New Data Products, Product Updates, and Other Data Announcements
2010 Data News
03
September 2010
Updated Advanced Microwave Scanning Radiometer - Earth Observing System
(AMSR-E) Level-3 data products were released by the AMSR-E Science Investigator-led
Processing System (SIPS) on 27 August 2010. These products were updated
to add a new product maturity code, R, for near-real-time data.
The SIPS included the new product maturity code to prepare for the upcoming
production and distribution of near-real-time AMSR-E data via the Land
Atmosphere Near-real-time Capability for EOS (LANCE) data system. As
no science algorithm changes were made, past data will not be reprocessed.
Updated products, and the latest algorithm versions, are as follows:
Land
AMSR-E/Aqua Daily L3 Surface Soil Moisture, Interpretive
Params, & QC EASE-Grids (AE_Land3)
Algorithm: Validated 7 - Stage 1
Ocean
AMSR-E/Aqua Daily L3 Global Ascending/Descending .25x.25
deg Ocean Grids (AE_DyOcn)
AMSR-E/Aqua Weekly L3 Global Ascending/Descending .25x.25 deg Ocean Grids
(AE_WkOcn)
AMSR-E/Aqua Monthly L3 Global Ascending/Descending .25x.25 deg Ocean
Grids (AE_MoOcn)
Algorithm: Validated 5 - Stage 2
Snow
AMSR-E/Aqua Daily L3 Global Snow Water Equivalent EASE-Grids
(AE_DySno)
AMSR-E/Aqua 5-Day L3 Global Snow Water Equivalent EASE-Grids (AE_5DSno)
AMSR-E/Aqua Monthly L3 Global Snow Water Equivalent EASE-Grids (AE_MoSno)
Algorithm: Validated 10 - Stage 1
In addition, Quality Assurance (QA) files, Production History (PH) files,
and browse imagery are now available for ordering. For more information
regarding AMSR-E data versions and ordering options, please refer to
the AMSR-E Data Web site.
New Delivered Algorithm Packages (DAPs) are also available for the updated
products. If you are interested in receiving a DAP or have additional
questions, please contact NSIDC User
Services.
03
September 2010
New versions of the Advanced Microwave Scanning Radiometer - Earth Observing
System (AMSR-E) Level-3 sea ice data products were released by the AMSR-E
Science Investigator-led Processing System (SIPS) on 27 August 2010.
These products were updated to Validated 13, Stage 1 to add a new product
maturity code, R, for near-real-time data. The new product maturity
code was included to accommodate the production of near-real-time AMSR-E
data by the SIPS through the Land Atmosphere Near-real-time Capability
for EOS (LANCE) in the near future.
The update to the AMSR-E 12.5 km sea ice product also corrects an issue
in the previous production code, V12, that introduced a new value in
the sea ice concentration difference field when data from the Bootstrap
Basic Algorithm (BBA) were missing. The value was -310; the standard
value when BBA data are missing is -200 to -300. Past data will not be
reprocessed, so users should be aware of this issue when working with
data prior to 27 August 2010.
In addition to updated products, the quality assurance (QA) files, production
history (PH) files, and browse imagery are now available for ordering.
Further details regarding AMSR-E data versions and ordering options are
available on the AMSR-E Data Web
site.
New Delivered Algorithm Packages (DAPs) are also available for the updated
products. If you are interested in receiving a DAP or have any other
questions, please contact NSIDC User
Services.
31
August 2010
Representatives from NSIDC will be attending the 2010 International
Symposium on the A-Train Satellite Constellation in New
Orleans, Louisiana USA from 25-28 October 2010. The symposium will include
a user workshop on 25 October, which will focus on instrument data products
and their use, followed by the three-day symposium to be held 26-28 October.
Registration is free, and the deadline to submit an abstract is 10 September
2010. For further details, please visit the NASA A-Train
Symposium Web page.
26 August 2010
NASA IceBridge preliminary ATM Icessn and ATM Qfit data for Greenland 2010 are now available from NSIDC. The Greenland 2010 data currently contain preliminary ATM Level-2 Icessn and ATM Level-1B Qfit data for the IceBridge CryoSat-2 underflight on 20 April 2010. The preliminary data will be replaced with the fully processed data in the near future. For documentation, and to access the data, see the catalog pages for IceBridge ATM L2 Icessn Elevation, Slope, and Roughness and IceBridge ATM L1B Qfit Elevation and Return Strength.
26 August 2010
NOAA@NISDC has published a new data set that is an inventory of a network of boreholes equipped for long-term permafrost temperature observations. The data set, IPA-IPY Thermal State of Permafrost (TSP) Snapshot Borehole Inventory, Version 1.0, consists of an inventory of boreholes established during the International Polar Year (IPY) 2007 - 2009 by the International Permafrost Association (IPA) under the Thermal State of Permafrost (TSP) Project #50. The TSP project goals included the acquisition of standardized temperature measurements (snapshots) from all permafrost regions on Earth, preparation of a global data set, and development of maps of contemporary permafrost temperatures. For more information and to access the inventory, see the IPA-IPY Thermal State of Permafrost (TSP) Snapshot Borehole Inventory, Version 1.0 Web page.
26 August 2010
In early September 2010, all registered NSIDC
Distributed Active Archive Center (DAAC) data users will receive
an email invitation from the Claes Fornell International (CFI) Group
on behalf of NASA to participate in a Web-based survey about the quality
and utility of NSIDC DAAC products and services. It takes approximately
ten minutes to complete this anonymous questionnaire, and optional comment
fields are provided to address your specific concerns.
The NSIDC DAAC is one of twelve NASA Earth Observing System Data and
Information System (EOSDIS) data centers to be evaluated by this survey.
Thank you in advance. Your feedback will
help us better serve our data user community.
If you would like to participate but are not a registered user of NSIDC
DAAC data products, please contact the CFI
Group.
06 August 2010
NOAA@NSIDC has published a new data set relevant to developing year-round transportation capabilities in the Arctic Ocean: Arctic Marine Transportation Program 1979-1986. The US Maritime Administration sponsored this multi-year program to define environmental conditions in the Bering, Chukchi, and Beaufort Seas; to obtain data to improve design criteria for ice-worthy ships and offshore structures; and to demonstrate the operational feasibility of commercial icebreaking ships along possible future Arctic marine routes. This data set consists of PDF documents of Arctic Marine Transportation Reports. For more information and to access the reports, see the Arctic Marine Transportation Program 1979-1986 Web page.
04 August 2010
NASA IceBridge NSERC L1B Geolocated Meteorologic and Surface Temperature Data for Antarctica 2009 are now available from NSIDC. For documentation, and to access the data, see the IceBridge NSERC L1B Geolocated Meteorologic and Surface Temperature Data catalog page.
03 August 2010
NASA IceBridge ATM POS/AV L1B Corrected ATM GPS Track and INS Data for Antarctica and Greenland 2009 are now available from NSIDC. For documentation, and to access the data, see the IceBridge ATM POS/AV L1B Corrected ATM GPS Track and INS Data catalog page.
28 July 2010
NASA IceBridge Snow Radar L1B Geolocated Radar Echo Strength Profiles data for Antarctica and Greenland 2009 are now available from NSIDC. For documentation, and to access the data, see the IceBridge Snow Radar L1B Geolocated Radar Echo Strength Profiles catalog page.
21 July 2010
NOAA@NSIDC has developed and will maintain a data inventory for the Science Ice Exercise (SCICEX) program — a US Navy Submarine Arctic Science Program that utilizes nuclear submarines to collect scientific data about the Arctic Ocean. To view the data inventory, see the SCICEX Data section of the NSIDC SCICEX Web site. The site acts as a collection point for past data acquired as part of the SCICEX program. The site also provides background information on the SCICEX program as well as links to SCICEX data, related publications and Web sites, and a link to the newly released SCICEX Phase II Science Plan Part I. NSIDC is actively looking for past SCICEX data. If you have data to contribute, please contact NSIDC SCICEX project manager, Ann Windnagel.
21 July 2010
NASA IceBridge DMS L0 Raw Imagery data for Antarctica 2009 are now available from NSIDC. For documentation, and to access data, see the IceBridge DMS L0 Raw Imagery catalog page.
20 July 2010
NASA IceBridge DMS L1B Geolocated and Orthorectified Images data for Antarctica 2009 are now available from NSIDC. For documentation, and to access data, see the IceBridge DMS L1B Geolocated and Orthorectified Images catalog page.
20 July 2010
NASA IceBridge MCoRDS L2 Picked Ice and Bed Surfaces and Ice Thickness data for Antarctica 2009 are now available from NSIDC. For documentation, and to access data, see the MCoRDS L2 Picked Ice and Bed Surfaces and Ice Thickness catalog page.
20
July 2010
The DMSP SSM/I Pathfinder Daily EASE-Grid
Brightness Temperatures data
set has been updated to include data from 01 July 2008 through 29 April
2009. This update includes algorithm changes in the DMSP F-13 input data
from Remote Sensing Systems (RSS), NSIDC's source for gridded brightness
temperature data. For intercomparison details and more information,
refer to the Data Source Version
Change section of the data set guide
document.
Processing updates for this data set beyond 29 April 2009, however,
have been temporarily suspended due to the failure of the DMSP
F-13 satellite. NSIDC is working with RSS to acquire data from the DMSP
F-17 satellite. Registered data users will be notified when we have received
and processed the F-17 data.
Please contact NSIDC User Services with any questions you may have.
08 July 2010
NASA IceBridge CAMBOT L1B Geolocated and Orthorectified Images for Greenland 2009 are now available from NSIDC. For documentation, and to access data, see the IceBridge CAMBOT L1B Geolocated and Orthorectified Images catalog page.
28 June 2010
NASA IceBridge PARIS L2 Ice Thickness data for Greenland 2009 are now available from NSIDC. For documentation, and to access data, see the IceBridge PARIS L2 Ice Thickness catalog page.
28 June 2010
NASA IceBridge Sander Air GRAV Data for Antarctica 2009 are now available from NSIDC. For documentation, and to access data, see the IceBridge Sander Air GRAV L1B Geolocated Anomalies catalog page.
25 June 2010
NASA IceBridge LVIS Level 2 data for Greenland 2009 are now available from NSIDC. For documentation, and to access data, see the IceBridge LVIS L2 Geolocated Ground Elevation and Return Energy Quartiles catalog page.
17 June 2010
NASA IceBridge ATM Qfit elevation data for Greenland 2009 are now available from NSIDC. For documentation, and to access data, see the IceBridge ATM L1B Qfit Elevation and Return Strength catalog page.
02 June 2010
NASA IceBridge Airborne Topographic Mapper Level 2 (ILATM2) ICESSN data for Greenland 2009 are now available from NSIDC. For documentation, and to access data, see the IceBridge ATM L2 ICESSN catalog page.
20
May 2010
AMSR-E Level-3 ocean products have been updated to Validated
4 (V04-Stage 1). The new V04 algorithm incorporates measures to further
reduce Radio Frequency Interference (RFI), and the products now include
an RFI angle grid as a parameter.
AMSR-E Level-3 ocean products include:
AMSR-E/Aqua Daily L3 Global Ascending/Descending .25x.25 deg Ocean Grids
AMSR-E/Aqua Weekly L3 Global Ascending/Descending .25x.25 deg Ocean Grids
AMSR-E/Aqua Monthly L3 Global Ascending/Descending .25x.25 deg Ocean Grids
NSIDC encourages data users to always work with the latest data (indicated
by the highest version number) available for a given date. The AMSR-E
Science Investigator-led Processing System (SIPS) is currently reprocessing
data from the start of the AMSR-E mission, 19 June 2002, through 28 April
2010. NSIDC will notify users when reprocessing is complete.
More information regarding the updated algorithm is provided on the
Data
Versions for V002 Web page. A new Delivered Algorithm Package (DAP)
is also available for these products by contacting NSIDC
User Services.
For information about AMSR-E products at NSIDC,
please see the AMSR-E/Aqua
Data Web
site.
13 May 2010
The NOAA@NSIDC team has just added 500 glacier photographs to the NSIDC Glacier Photograph Collection that were taken from space. These photographs were taken by astronauts stationed on the International Space Station and the Space Shuttle Endeavor between 1994 and the beginning of 2010. The photos were collected in collaboration with The Gateway to Astronaut Photography of Earth project. The goal is to make these photos more widely available and discoverable. To see the new photos, go to the Glacier Photograph Collection Search & Order Interface and search for International Space Station and Space Shuttle Endeavor in the Photographer Name list.
11 May 2010
The NOAA@NSIDC team has just implemented a new feature for the Glacier Photograph Collection Search & Order Interface. Now, when you pick up your high-resolution photo orders from the FTP site, a metadata file in ASCII text format (.txt) is provided with each photograph. Previously, the metadata had to be downloaded separately from the Glacier Photograph Collection Web site. This new process alleviates that step and streamlines the glacier photo order procedure. The metadata file includes such information as glacier name, location, photographer, and a data citation. To explore this new feature, see the Glacier Photograph Collection Search & Order Interface.
27 April
2010
Both the AMSR-E/Aqua Daily EASE-Grid Brightness
Temperatures and AMSR-E/Aqua Daily Global
Quarter-Degree Gridded Brightness Temperatures data sets have been updated.
This quarterly update extends the time series of both data sets through 31
March 2010. This includes data in all three EASE-Grid projections (north,
south, and global) as well as global quarter-degree latitude-longitude gridded
data.
22 April 2010
NASA provides IceBridge mission updates via Twitter. The updates include timely messages on a variety of topics, such as flights, weather, mapping, and recently acquired images. See NASA IceBridge Twitter to sign up.
21 April 2010
IceBridge Data News is now available from the NSIDC Data News RSS. The NSIDC Data News RSS feed provides news on new NSIDC data products, product updates, and other data announcements. News about IceBridge data is now included in the news feed.
21 April 2010
The IceBridge Data Web site now includes the Instrument Data Summaries page and the Campaign Data Summaries page. The Instrument Data Summaries page lists Operation Ice Bridge instruments with data provider contact information. Links are provided to available data servers.
The Campaign Data Summaries page lists IceBridge data collected by campaign, including date, flight number, location and instruments. Also included are links to Operation Ice Bridge flight documents.
20 April 2010
The NOAA@NSIDC team stewards several data sets that originated with the defense and intelligence services. These data were featured in the TakePart.com article, "Global Warming: The Military's Other Enemy." NOAA@NSIDC Program Manager, Florence Fetterer, and NSIDC Scientist, Walt Meier, were interviewed for the article and noted the importance of these data to climate research.
15 April 2010
NOAA@NISDC's Web site has been redesigned. The new site has a cleaner look and easier navigation. The site features a scrolling image slider highlighting some of NOAA@NSIDC's most popular data products. Visit the site at http://nsidc.org/noaa/index.html.
02 April
2010
NSIDC is pleased to announce the release of Validated 12 (V12-Stage 1) AMSR-E
Level-3 sea ice products. The V12 algorithm corrects an error in the method
for applying the multi-year sea ice mask that had caused large areas of Arctic
to be erroneously masked in the Snow Depth on Sea Ice parameter. The multi-year
sea ice mask and the snow melt mask are now stored within the AMSR-E/Aqua
Daily L3 12.5 km Brightness Temperature, Sea Ice Concentration, & Snow
Depth Polar Grids (AE_SI12) product. The AE_SI12 product is the only sea ice
product with the Snow Depth on Sea Ice parameter, but all AMSR-E sea ice
products use the same production code and therefore will be processed with
the V12 algorithm.
AMSR-E Level-3 sea ice products include the following:
AMSR-E/Aqua Daily L3 6.25 km 89 GHz Brightness Temperature Polar Grids (AE_SI6)
AMSR-E/Aqua Daily L3 12.5 km Brightness Temperature,
Sea Ice Concentration, & Snow
Depth Polar Grids (AE_SI12)
AMSR-E/Aqua Daily L3 25 km Brightness Temperature & Sea
Ice Concentration Polar Grids (AE_SI25)
NSIDC encourages users to always work with the latest data/highest version
number available for a given date. The AMSR-E Science Investigator-led Processing
System (SIPS) has begun reprocessing data, and NSIDC will notify data users
when reprocessing is complete. Forward processing will begin once reprocessing
is complete.
25
March 2010
NSIDC is pleased to announce the release of a new data set, Co-Registered AMSR-E, QuikSCAT, and WMO Data. The data set contains the following spatially and temporally co-registered data:
- Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) brightness temperatures for all channels
- Quick Scatterometer (QuikSCAT) backscattering coefficients
- World Meteorological Organization (WMO) ground observations acquired from
more than two thousand stations
QuikSCAT and WMO data are available from 01 January 2002 through 19 March
2009, and AMSR-E data are included from 19 June 2002 through 19 March 2009.
For more information and data access, please refer to the Co-Registered
AMSR-E, QuikSCAT, and WMO Data product Web page.
24
March 2010
The DMSP SSM/I Daily Polar Gridded Brightness
Temperatures data set has been
updated through 29 April 2009. Processing updates for this product beyond 29
April 2009, however, have been temporarily suspended due to the failure of
the Defense Meteorological Satellite Program (DMSP) F-13 satellite. NSIDC is
working with the data source for this product, Remote Sensing Systems (RSS),
to acquire data from the DMSP F-17 satellite. We hope to have these data
processed by late Spring 2010.
Please contact NSIDC User Services
with any questions you may have.
18 March 2010
The Daily Global Land Surface Parameters Derived
from AMSR-E data set is now
available. This data set contains geophysical parameters
generated from the AMSR-E instrument on the NASA Aqua satellite, including:
- Air temperature minima and maxima at approximately 2 meters in height
- Fractional
cover of open water on land
- Vegetation canopy microwave transmittance
- Surface soil moisture at less than or equal to 2 centimeters soil depth
- Integrated water vapor content of the intervening atmosphere for the total
column
Data extend from 19 June 2002 through 31 December
2008 and were derived over land for non-precipitating, non-snow,
and non-ice land surface conditions. The primary input data were daily AMSR-E
dual polarized multi-frequency, ascending and descending overpass brightness
temperature data.
For more information and data access, please refer to the Daily
Global Land Surface Parameters Derived from AMSR-E product Web page.
15 March 2010
A new daily snow depth analysis data set is now available from NSIDC. The
data set, provided by Ross Brown and Bruce Brasnett of Environment Canada,
contains a Northern Hemisphere subset of the global, daily snow depth analysis
produced by the Canadian Meteorological Centre since 1998. The daily snow depth
analyses are based on the optimal interpolation of real-time snow depth information
from surface synoptic observations, meteorological aviation reports, and special
aviation reports. Also included are monthly mean snow depth and derived
monthly mean snow water equivalent estimated using a monthly mean snow density
look-up table. The data set covers the period from April 1998 through the end
of 2009, and will be updated annually while the operational analysis is maintained.
For more information, please see the Canadian
Meteorological Centre (CMC) Daily Snow Depth Analysis Data product Web
page.
19 February 2010
The Antarctic Glaciological Data Center (AGDC) at NSIDC is pleased to announce the release of a new data set, Microstructural Location and Composition of Impurities in Polar Ice Cores.The data set consists of measurements of impurities and ions in three polar ice cores: the Vostok 5G ice core and the Byrd ice core from Antarctica, and the Greenland Ice Sheet Project 2 (GISP2) D core.
For more information on Antarctic data from AGDC, see the AGDC Data Catalog Web page at http://nsidc.org/agdc/data.html.
15 February 2010
The Antarctic Glaciological Data Center (AGDC) at NSIDC is pleased to announce the release of a new data set, WAIS Divide Ice Core Images, Antarctica. The data set contains digital images of ice core sections from the WDC06A ice core in Antarctica.
For more information on Antarctic data from AGDC, see the AGDC Data Catalog Web page at http://nsidc.org/agdc/data.html.
15 February 2010
A new Web page has been developed and launched highlighting the efforts of NOAA@NSIDC on the Science Ice Exercise (SCICEX) program. SCICEX is a project in which Navy nuclear submarines were utilized to acquire scientific data about the Arctic Ocean. This jump page is intended to provide a central place to find out information on SCICEX and how and where to acquire the data. For details, see the The Science Ice Exercise (SCICEX) Web page on the NOAA@NSIDC Web site.
04 February 2010
NSIDC is pleased to announce that all NSIDC DAAC data holdings can now be discovered through the Warehouse Inventory Search Tool (WIST). Previously, only DAAC ECS data were included in this tool.
21 January
2010
Both the AMSR-E/Aqua Daily EASE-Grid
Brightness Temperatures and AMSR-E/Aqua
Daily Global Quarter-Degree Gridded Brightness Temperatures data
sets have been updated. This quarterly update extends the time series
of both data sets through 31 December 2009. This includes data in all
three EASE-Grid projections (north, south, and global) as well as global
quarter-degree latitude-longitude gridded data.
21 January 2010
NSIDC is pleased to announce our new Beta Advanced Data Search Tool. Powered by the NSIDC Searchlight engine, this tool delivers data downloads immediately, with you in control of on-the-fly reformatting, reprojection, and subsetting of the data. In this way, we are delivering only what you want, and how you want it. The sooner you can obtain what you want, in a format you can quickly understand and use, the more time you will have to devote to your scientific investigations.
While the Searchlight engine provides extensive functionality for searching, browsing, retrieving, and manipulating NSIDC data holdings, it was built with more than just data search in mind. It represents a suite of fundamental architectural changes that allow NSIDC to develop even more capabilities to help researchers work with cryospheric data.
At this time, only a selection of NSIDC data holdings are available through this tool. A list of the current data holdings is available from the main Web page of the Beta Advanced Data Search Tool, under the heading Data Sets. However, we are working to make all NSIDC data holdings available via this tool in the future.
21 January 2010
In collaboration with the University of Colorado at Boulder School of Education, NSDIC has created and released a new Google Earth movie called A Climate Change Tour of Cold Places. With a focus on snow and ice, this tour explains how snow and ice play critical roles in the changing climate. The tour is geared towards a K-12 audience with down-to-earth examples and terms that are simple to understand. Students get a closer look at what ice and snow tell us about how climate is changing especially in regions near the Earth's North and South poles. It includes interviews with NSIDC scientists, a discussion of glaciers, and an ice shelf break-up animation. The KML file is available on the NSIDC Virtual Globes Web page.
13 January 2010
NOAA@NSIDC presented several demos and a poster at the Fall 2009 AGU. NOAA@NSIDC’s presence at the meeting included demonstrations of the new Glacier Photograph Collection Search & Order Interface and of a new Tour of the Cryosphere in Google Earth for K-12 outreach. A poster (C41A-0448) titled Operational Products Archived at the National Snow and Ice Data Center highlights how the team at NSIDC works with NOAA and other operational producers of sea ice and snow analyses to widen the community of users and to make products easier for scientists to use. The poster is available from the NSIDC Presentations and Posters Web page. The Glacier Photograph collection is described in an article in the NSIDC Monthly Highlights, Glacier Photographs at NSIDC, with links to the collection interface.
13 January 2010
Short-term Cooling on a Warming Planet, the featured article for December 31, 2009 in NOAA’s Climate Watch Magazine, was authored by NSIDC’s Michon Scott. Michon interviewed David Easterling, a climate scientist at NOAA’s National Climatic Data Center, and Michael Schlesinger, a professor in the Department of Atmospheric Sciences at the University of Illinois at Urbana-Champaign, about declining temperatures since 1998.
2009 Data News
10
December 2009
Processing of the following data sets is temporarily suspended due to
the recent loss of the Defense Meteorological Satellite Program (DMSP)
F-13 satellite:
DMSP SSM/I Daily Polar Gridded Brightness
Temperatures
DMSP SSM/I Daily and Monthly Polar Gridded
Bootstrap Sea Ice Concentrations
Sea Ice Concentrations from Nimbus-7
SMMR and DMSP SSM/I Passive Microwave Data
Bootstrap Sea Ice Concentrations from
Nimbus-7 SMMR and DMSP SSM/I
DMSP SSM/I Pathfinder Daily EASE-Grid
Brightness Temperatures
NSIDC is working with our data source, Remote Sensing Systems (RSS),
to acquire data for these products from the DMSP F-17 satellite. We hope
to have the data processed and available by late Spring 2010.
In the meantime, F-17 data are available for the following near-real-time
data sets:
Near-Real-Time DMSP SSM/I-SSMIS Daily
Polar Gridded Brightness Temperatures
Near-Real-Time DMSP SSM/I-SSMIS Daily
Polar Gridded Sea Ice Concentrations
Near-Real-Time DMSP SSM/I-SSMIS Pathfinder
Daily EASE-Grid Brightness Temperatures
07 December
2009
The Antarctic Glaciological Data Center (AGDC) at NSIDC is pleased to announce the release of a new data set, Methane Isotopes from the WAIS Divide Ice Core (NSIDC-0435). This data set includes depth, gas age, and the isotopic composition of methane (∂13C and ∂D of CH4) from the West Antarctic Ice Sheet (WAIS) Divide ice core, WDC05A, in Antarctica.
For more information on Antarctic data from AGDC, see the AGDC Data Catalog Web page at http://nsidc.org/agdc/data.html.
30 November 2009
On 16 November 2009, ROCS hosted a meeting of the managers of Campus Cultural Collections to discuss an emergency action plan for the special materials held in the NSIDC archives. Special guests for this meeting were representatives from Huntington T. Block, a company that provides insurance coverage for fine arts and other collections held at CU. The meeting was devoted to issues including where to find large freezers in an emergency, establishing an official emergency campus network, and formalizing the group within CU. Large freezers, an important part of disaster recovery involving water, either from a leak, a flood, or from fire prevention, are important for saving paper-based materials because it is very important to freeze the wet items within 48 hours. The freezers were located and found to be very close to NSIDC, so in case of an emergency, the materials can be moved quickly. The meeting was very successful in creating a plan of action in case of an emergency.
16
November 2009
On Wednesday, 18 November 2009 from 9:00 a.m. to noon (USA Mountain
Time), data access via File Transfer Protocol (FTP) will be unavailable
due to NSIDC FTP server maintenance. We apologize for any inconvenience
10
November 2009
The AMSR-E Science Investigator-led Processing System (SIPS) team re-initialized
the multi-year sea ice mask on 05 October 2009 for Version 11 (V11) of
the AMSR-E/Aqua Daily L3 12.5 km Brightness
Temperatures, Sea Ice Concentration, & Snow Depth Polar Grids (AE_SI12)
product. Re-initializing the multi-year sea ice mask will ensure that
the “Snow Depth on Sea Ice” parameter in the Northern Hemisphere
is correct for the 2009/2010 winter sea ice season. The error in the Northern
Hemisphere “Snow Depth on Sea Ice” parameter has not been
corrected in data for previous sea ice seasons; therefore, users should
exercise caution when working with the Northern Hemisphere "Snow
Depth on Sea Ice" parameter in data using the V11 algorithm prior
to 05 October 2009. Algorithm V12 will be implemented in the near future
and AE_SI12 data for the entire AMSR-E mission will be reprocessed, correcting
the "Snow Depth on Sea Ice" parameter. Registered users will
be notified when V12 is installed and reprocessing begins.
If you have questions, please contact NSIDC
User Services.
29 October 2009
Every month, NSIDC features a data set or important program at NSIDC. For October, the Glacier Photograph Collection is featured. To read the full article, see the NISDC Monthly Highlights Web page.
29 October 2009
Florence Fetterer, NOAA@NSIDC program manager, and Ann Windnagel, NOAA@NSIDC team member, attended the Science Ice Exercise (SCICEX) Science Advisory Committee meeting on October 5th and 6th in Washington, DC. SCICEX is a project that utilizes Navy nuclear-powered submarines to obtain scientific measurements of the Arctic Sea such as ice draft profiles; physical, chemical, and biological water properties; and bathymetry. Fetterer and Windnagel attended the meeting to give presentations about data management at NSIDC describing how the services NSIDC provides would benefit the SCICEX program. The goal is to acquire funding to archive and distribute SCICEX data at NSIDC.
19 October
2009
NSIDC has recently updated the following sea ice concentration data
sets:
Sea Ice Concentrations from Nimbus-7
SMMR and SSM/I DMSP Passive Microwave Data - Preliminary
Near-Real-Time DMSP SSM/I Daily Polar Gridded Sea Ice Concentrations
In the past, sea ice concentrations for near-real-time and preliminary
sea ice data did not include concentrations below 15 percent. However,
to be more consistent with the final sea ice concentration data NSIDC receives
from the Goddard Space Flight Center, and to provide users with all possible
data values, we have reprocessed the data to include concentrations below 15 percent.
Data users should not see any changes in the sea ice data they currently
have with concentrations above 15 percent.
For access to updated data, please refer to the data set Web page
links listed above.
15 October
2009
Both the AMSR-E/Aqua Daily EASE-Grid
Brightness Temperatures and AMSR-E/Aqua
Daily Global Quarter-Degree Gridded Brightness Temperatures data
sets have been updated. This quarterly update extends the time series
of both data sets through 30 September 2009. This includes data in all
three EASE-Grid projections (north, south, and global) as well as global
quarter-degree latitude-longitude gridded data.
12 October 2009
NOAA@NSIDC has released the Canadian Ice Service Arctic Regional Sea Ice Charts in SIGRID-3 Format data set. The Canadian Ice Service (CIS) produces digital Arctic regional sea ice charts for marine navigation, climate research, and input to the Global Digital Sea Ice Data Bank (GDSIDB) on a daily basis. The ice charts are created through the manual analysis of in situ, satellite, and aerial reconnaissance data. This data set begins in 2006 and is updated approximately once a week. The regions this data set covers are the Northern and Southern Canadian Waters. The charts are distributed as vector shapefiles in SIGRID-3 format. The SIGRID-3 vector file format is a World Meteorological Organization (WMO) ice chart archive format developed by the operational ice services and NSIDC. The International Ice Charting Working Group (IICWG) and the GDSIDB promote archiving and distributing ice charts for the use of researchers. For more information or to access the data, see the Canadian Ice Service Arctic Regional Sea Ice Charts in SIGRID-3 Format Summary page.
12 October
2009
The NSIDC Antarctic Glaciological Data Center (AGDC) has published a new data set, US ITASE Stable Isotope Data, Antarctica (NSIDC-0425). The data set includes stable isotope data from snow pits, firn, and ice cores collected by the the US component of the International Trans-Antarctic Scientific Expedition ( ITASE), between 1999 and 2007. Currently, data from 1999 and 2000 are available. Data from 20001 to 2007 will be added as they become available.
For more information on Antarctic data from AGDC, see the AGDC Data Catalog Web page at http://nsidc.org/agdc/data.html.
12 October
2009
NSIDC has adjusted the algorithm used in the Near-Real-Time
SSM/I-SSMIS EASE-Grid Daily Global Ice Concentration and Snow Extent
(NISE) Version
4 product. A sea ice concentration threshold of 15 percent had been introduced
in NISE Version 4, so that pixels with a sea ice concentration of 14
percent or less were assigned a value of 255, or ocean. After further
analysis, we have determined that removing this threshold will provide
greater consistency with NISE Version 2 data. All NISE Version 4 data
have been reprocessed using this modified algorithm.
For access to updated data and documentation, please refer to the NISE product catalog page.
23 September
2009
During September and early October 2009, NSIDC Distributed
Active Archive Center (DAAC) data users will receive an e-mail
invitation from CFI Group on behalf of NASA to participate in a Web-based
survey about the quality and utility of NSIDC DAAC products and services.
It takes approximately ten minutes to complete this anonymous questionnaire.
Your feedback affects our future performance and helps us identify
user and science needs. The NSIDC DAAC is one of twelve NASA Earth
Observing System Data and Information System (EOSDIS) data centers
evaluated by this survey.
If you have not received an email and would like to participate, please
contact the CFI group.
11 September
2009
NSIDC would like to report an error currently in two near-real-time
data products: the Near-Real-Time DMSP
SSM/I Daily Polar Gridded Brightness Temperatures and the Near-Real-Time
DMSP SSM/I-SSMIS Pathfinder Daily EASE-Grid Brightness Temperatures.
A calibration problem in the F17 37H GHz channel is causing a bias
of 3 to 4 Kelvin lower than should be reported for the 37H GHz channel.
This bias is occurring in the data from 01 April 2009 through 15 August
2009. Channels other than the 37H GHz, and data outside of this time
range, are not impacted. These data products will be updated as soon
as we receive the corrected data from our data source.
09 September
2009
The Antarctic Glaciological Data Center (AGDC) at NSIDC is pleased to announce the release of a new data set, Digital Imaging for Siple Dome Ice Core Analysis, Antarctica. The data set contains high-resolution images of sections from the Siple Dome A ice core, in TIFF and JPG formats.
02 September
2009
As of 01 September 2009, the processing stream for the Near-Real-Time
DMSP SSM/I-SSMIS Pathfinder Daily EASE-Grid Brightness Temperatures data
set has been switched from the SSM/I sensor on board the Defense Meteorological
Satellite Program (DMSP) F13 satellite to the SSMIS sensor on the DMSP-F17
satellite. This change was necessary due to the F13 satellite nearing
the end of its mission. For more documentation and data access, refer
to the Near-Real-Time
DMSP SSM/I-SSMIS Pathfinder Daily EASE-Grid Brightness Temperatures Web
page.
28 August
2009
As of 28 August 2009, the processing stream for the Near-Real-Time Ice
and Snow Extent (NISE) product has been switched from the SSM/I sensor
on board the Defense Meteorological Satellite Program (DMSP) F13 satellite
to the SSMIS sensor on the DMSP-F17 satellite. This change was necessary
due to the F13 satellite nearing the end of its mission. For more
information and data access, refer to the Near-Real-Time
SSM/I-SSMIS EASE-Grid Daily Global Ice Concentration and Snow Extent Web
page.
05
August 2009
The Antarctic Glaciological Data Center (AGDC) at NSIDC is pleased to announce the release of new data sets. For a complete listing of AGDC data, see the AGDC Data Catalog. The newly released AGDC data sets include the following:
Late Holocene Climate Variability, Dry Valleys, Antarctica (NSIDC-0399)
Nitrogen and Oxygen Gas Isotopes in the Siple Dome and Byrd Ice Cores, Antarctica (NSIDC-0407)
Gases in Firn Air and Shallow Ice at the WAIS Drilling Site, Antarctica (NSIDC-0412)
03
August 2009
The AMSR-E sea ice team has notified NSIDC of an error with the "Snow
Depth on Sea Ice" parameter in the AMSR-E/Aqua Daily L3 12.5 km
Brightness Temperatures, Sea Ice Concentration, & Snow Depth Polar
Grids (AE_SI12). The method of applying the dynamic multi-year ice mask
used for the "Snow Depth on Sea Ice" parameter is causing large
areas of the Arctic to be erroneously masked. This error does not affect
the "Snow Depth on Sea Ice" parameter in the Antarctic. The
sea ice team is working with the AMSR-E Science Investigator-led Processing
System (SIPS) at the Global Hydrology Resource Center to determine a
solution. The solution will be implemented in the V12 algorithm, and
the SIPS will reprocess data from the entire AMSR-E mission. Since the
sea ice concentration parameters are not affected, NSIDC will continue
to distribute the AE_SI12 product with the V11 algorithm until reprocessing
with the V12 algorithm is complete. Users should not work with the Northern
Hemisphere "Snow Depth on Sea Ice" parameter in data using
the V11 algorithm. Registered users will be notified when the V12 algorithm
is implemented and reprocessing begins. We apologize for any inconvenience
this may cause.
If you have questions, please contact NSIDC
User Services.
27
July 2009
Reprocessing is now complete for the following AMSR-E Level 3 products:
Land Product:
AMSR-E/Aqua Daily L3 Surface Soil Moisture, Interpretive
Parms, & QC EASE-Grids (AE_Land3)
Algorithm: Validated 06
Sea Ice Products:
AMSR-E/Aqua Daily L3 6.25 km 89 GHz Brightness Temperature Polar Grids
(AE_SI6)
AMSR-E/Aqua Daily L3 12.5 km Brightness Temperatures, Sea Ice Concentration, & Snow
Depth Polar Grids (AE_SI12)
AMSR-E/Aqua Daily L3 25 km Brightness Temperatures & Sea Ice Concentration
Polar Grids (AE_SI25)
Algorithm: Validated 11
Snow Products:
AMSR-E/Aqua Daily L3 Global Snow Water Equivalent EASE-Grids (AE_DySno)
AMSR-E/Aqua 5-Day L3 Global Snow Water Equivalent EASE-Grids (AE_5DSno)
AMSR-E/Aqua Monthly L3 Global Snow Water Equivalent EASE-Grids (AE_MoSno)
Algorithm: Validated 09
All data from 19 June 2002, the beginning of the AMSR-E mission, through
the present now use the most up-to-date algorithm. For more information
regarding the algorithm history of AMSR-E products, refer to the Data
Versions for V002 Web page. For data access and documentation, visit
the Data Summaries Web page.
27
July 2009
NSIDC is pleased to announce that reprocessing is complete for AMSR-E/Aqua
L2A Global Swath Spatially-Resampled Brightness Temperatures (AE_L2A)
and AMSR-E/Aqua Daily L2B Surface Soil Moisture,
Interpretive Parms, & QC
EASE-Grids (AE_Land) data products. AE_L2A data using the Validated
10 - Stage 3 algorithm, and AE_Land data using the Validated 09 - Stage
1 algorithm, are now available from 19 June 2002 (the beginning of the
AMSR-E mission) through the present. More information regarding the algorithm
history of AMSR-E products is available on the Data
Versions for V002 Web page.
21 July 2009
The Glacier Photograph Collection has a new Search & Order Web interface. A complete redesign of the old interface has been implemented as well changes to the overall appearance of the Web site. The new Search & Order interface provides a more streamlined and efficient way for users to query the Glacier Photograph Collection database. Users can search for glaciers by spatial coverage and temporal range as well as by glacier name or by photographer. Users also now have the option of running multiple searches before placing an order. To access the new interface, see the Glacier Photograph Collection Web site.
16
July 2009
The AMSR-E/Aqua Daily EASE-Grid Brightness Temperatures and AMSR-E/Aqua
Daily Global Quarter-Degree Gridded Brightness Temperatures data sets
have been updated. This update extends the time series of both data sets
through 30 June 2009. These data sets remain in Version 3.
15 July
2009
Data are now available through 31 December 2008 for the Sea
Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I Passive Microwave data
set. These data will remain online until NSIDC receives the Final data from
the Goddard Space Flight Center (GSFC).
For information regarding this data set, or to access data via FTP, please
visit the link provided above.
10 July
2009
The DMSP SSM/I Daily Polar
Gridded Brightness Temperatures data set has been
updated through 31 December 2008. With this update, a new version of the
source data was used in the gridded brightness temperature processing. Due
to this, all files beginning 01 July 2008 are now Version 3. Data remain
Version 2 prior to 01 July 2008. For more information regarding the differences
between the Version 2 and Version 3 files, refer to the Detailed Data Description
section in the data set documentation. Data set documentation and FTP data
are accessible via the product catalog page.
08 July 2009
On 17 July 2009, the MODIS/Terra Snow Cover Daily L3 Global 500m Grid (MOD10A1) Version 4 (V004) snow data product will be removed from NSIDC's archive. NSIDC will retain a small amount of MODIS V004 data from this data set for use in comparisons with other data versions. This is referred to as the Golden Month. The Golden Month covers the time period 29 August 2002 (day of year 241) through 7 October 2002 (day of year 280).
For access to the V004 Golden Month data, contact NSIDC User Services.
16 June 2009
NOAA@NSIDC is pleased to announce the release of a new data set: Recurring Spring Leads and Landfast Ice in the Beaufort and Chukchi Seas, 1993-2004. This data set contains information on recurring spring leads and landfast ice extent in the Beaufort and Chukchi Seas from 1993 to 2004. The data set uses data acquired from the NOAA Advanced Very High Resolution Radiometer (AVHRR) and the Radarsat-1 Synthetic Aperture Radar (SAR). The data is provided in a number of formats including ArcGIS geodatabases and shapefiles. For more information about this data set and to obtain the data, see the Recurring Spring Leads and Landfast Ice in the Beaufort and Chukchi Seas, 1993-2004 summary page.
10 June
2009
Information and statistics on 157 glaciers from the Huasco Catchment in Chile have been added to the World Glacier Inventory. The information was provided by The Center for Advanced Studies in Arid Zones (CEAZA) in Chile. To search for these glaciers, select CEAZA from the Data Contributor pull-down menu from the World Glacier Inventory Search Web page. More information about this update is available in the Quality Assessment and History of Updates section of the World Glacier Inventory guide document.
08 June
2009
NSIDC is pleased to announce the release of Validated 11 (V11-Stage
1) AMSR-E Level-3 sea ice products as of 29 May 2009. The algorithm for
V11 corrected an error introduced in the V10 algorithm which caused the
snow depth on sea ice parameter to be overestimated by a factor of approximately
two. Although AMSR-E/Aqua Daily L3 12.5 km Brightness Temperature, Sea
Ice Concentration, & Snow Depth Polar Grids (AE_SI12) is the only
product with the affected parameter, all AMSR-E sea ice products use
the same production code and will therefore be processed with the V11
algorithm.
AMSR-E Level-3 sea ice products include the following:
AMSR-E/Aqua Daily L3 6.25 km 89 GHz Brightness Temperature Polar Grids
(AE_SI6)
AMSR-E/Aqua Daily L3 12.5 km Brightness Temperature, Sea Ice Concentration, & Snow
Depth Polar Grids (AE_SI12)
AMSR-E/Aqua Daily L3 25 km Brightness Temperature & Sea Ice Concentration
Polar Grids (AE_SI25)
05
June 2009
NSIDC has officially switched its processing stream for near-real-time
passive microwave brightness temperatures from the SSM/I sensor on board
the Defense Meteorological Satellite Program (DMSP) F13 satellite to
the SSMIS sensor on the DMSP-F17 satellite. This change in the processing
stream was necessary due to a failing recorder on F13. At this time,
the following products have been processed back to 10 May 2009 using
F17 data:
Near-Real-Time DMSP SSM/I Daily Polar Gridded Brightness Temperatures
Near-Real-Time DMSP SSM/I Daily Polar Gridded Sea Ice Concentrations
Sea Ice Index
For more information regarding the processing of these products,
refer to the data set documentation via the links above.
02 June 2009
As of 1 June 2009, the following Version 4 MODIS snow and sea ice data products have been removed from NSIDC's archive:
Version 4 Snow Products:
MOD10L2: MODIS/Terra Snow Cover 5-Min L2 Swath 500m
MYD10L2: MODIS/Aqua Snow Cover 5-Min L2 Swath 500m
MOD10A2: MODIS/Terra Snow Cover 8-day L3 Global 500m Grid
MYD10A2: MODIS/Aqua Snow Cover 8-Day L3 Global 500m Grid
Version 4 Sea Ice Product:
MYD29: MODIS/Aqua Sea Ice Extent 5-Min L2 Swath 1km
NSIDC will retain a small amount of MODIS Version 4 data from each data set for use in comparisons with other data versions. This is referred to as a golden month. The golden month covers the time period 29 August 2002 (day of year 241) through 7 October 2002 (day of year 280).
For access to the Version 4 golden month data, contact NSIDC User Services. Version 5 of the above data products will remain available.
20 May 2009
NSIDC has a new URL (ftp://sidads.colorado.edu/pub/metadata/) to access our Web Accessible Metadata Folder, which contains on-line XML files representing
our metadata holdings.
The XML files, available in both DIF and FGDC formats, are updated on a daily basis. These metadata files are provided to allow other organizations to regularly harvest our metadata collection for inclusion in data discovery and access portals. If you currently obtain metadata via our Web Accessible Metadata Folder, please confirm that you are using the new URL (ftp://sidads.colorado.edu/pub/metadata/).
20 May 2009
Beginning 10 June 2009, Version 1 AMSR-E data will no longer be available from NSIDC. Version 1 data will remain available for ordering until 10 June 2009 through the Warehouse Inventory Search Tool (WIST), Data Pool, or the Search 'n Order Web Interface (SNOWI). NSIDC currently distributes both Version 1 and Version 2 AMSR-E products. AMSR-E Version 2 products use the most up-to-date algorithms.
15 May 2009
Due to insuficient data received, the MODIS/Terra Snow Cover Monthly L3 Global 0.05Deg CMG, Version 5 (MOD10CM) data product is missing the following granules:
June 2001
March 2002
December 2003.
13 May
2009
Reprocessing has begun for the following AMSR-E Level-3 Land, Sea Ice, and Snow data products:
Land Product
AMSR-E/Aqua Daily L3 Surface Soil Moisture, Interpretive Parameters, & QC EASE-Grids (AE_Land3)
Algorithm: Validated 06
Sea Ice Products
AMSR-E/Aqua Daily L3 6.25 km 89 GHz Brightness Temperature Polar Grids (AE_SI6)
AMSR-E/Aqua Daily L3 12.5 km Brightness Temperatures, Sea Ice Concentration, & Snow Depth Polar Grids (AE_SI12)
AMSR-E/Aqua Daily L3 25 km Brightness Temperatures & Sea Ice Concentration Polar Grids (AE_SI25)
Algorithm: Validated 10
Snow Products
AMSR-E/Aqua Daily L3 Global Snow Water Equivalent EASE-Grids (AE_DySno)
AMSR-E/Aqua 5-Day L3 Global Snow Water Equivalent EASE-Grids (AE_5DSno)
AMSR-E/Aqua Monthly L3 Global Snow Water Equivalent EASE-Grids (AE_MoSno)
Algorithm:
Validated 09
Data from 19 June 2002, the date the AMSR-E mission began, through the present
will be reprocessed. Another announcement will be posted when reprocessing
is complete.
13 May
2009
Users of the NSIDC Antarctic Cryosphere Access Portal (A-CAP) can now save maps and download the source data for each of the layers displayed in the map. See the A-CAP News Web page for more information.
01 May
2009
The processing environment for the Graphical Interface
for Subsetting, Mapping, and Ordering (GISMO) tool has recently been upgraded. Though we do not anticipate
any difficulties, we recommend that users look over GISMO data order results
carefully. Please report any issues you experience to NSIDC
User Services.
24
April 2009
AMSR/ADEOS-II L2A Global Swath Spatially-Resampled
Brightness Temperatures (AA_L2A) Version 1 data are now available from
NSIDC. The data are available from 28 January until 24 October 2003, when
the satellite was lost, and are restricted to NASA approved users. For information
on becoming a NASA-approved user, please go to the Order
Data Web page, and refer to the information under the column heading:
First Time Users of AMSR/ADEOS-II Data.
23
April 2009
Both the AMSR-E/Aqua Daily EASE-Grid
Brightness Temperatures and AMSR-E/Aqua
Daily Global Quarter-Degree Gridded Brightness Temperatures data
sets have been updated. This update extends the time series of both
data sets to 31 March 2009. The data in this update are still considered
Version 3.
17
April 2009
Due to system maintenance from Monday, 20 April 2009 through Thursday,
23 April 2009, NSIDC will not receive MODIS data from our data provider.
Once the maintenance period has passed, NSIDC will ingest and
archive the missing MODIS data to ensure continual temporal coverage.
14 April 2009
Data are now available through June 2008 for the DMSP
SSM/I Daily and Monthly Polar Gridded Sea Ice Concentrations data
set. The Special Sensor Microwave Imager (SSM/I) derived ice concentrations
are daily total and monthly-averaged ice fractions for both hemispheres
with a temporal coverage record now spanning from June 1987 to June
2008.
08 April 2009
NSIDC is pleased to announce that AMSR-E Soil Moisture Validation data
have been updated to include all data sets for the Soil Moisture Experiment
2003 (SMEX03) campaign. The SMEX03 campaign was conducted in Oklahoma,
Georgia, and Alabama, USA, between 23 June and 18 July 2003, and in Brazil
during the first two weeks of December 2003. For data access and documentation,
visit the SMEX03
Data Sets Web page.
If you have questions, please contact NSIDC
User Services.
06 April 2009
Two recent improvements in tiepoints used in the AMSR-E standard sea ice concentration algorithm may result in a relative change in sea ice area and extent for users working with multiple versions of the data. The effect on the output depends on season and hemisphere, but users may notice a decline in area and extent across the Arctic and an increase in the Antarctic in data with the most recent algorithm. The algorithm changes are reflected in the change from versions B06 to T08 and T08 to V10.
AMSR-E Level-3 sea ice products using the standard sea ice concentration algorithm include the following:
- AMSR-E/Aqua Daily L3 12.5 km Brightness Temperature, Sea Ice Concentration, & Snow Depth Polar Grids (AE_SI12)
- AMSR-E/Aqua Daily L3 25 km Brightness Temperature & Sea Ice Concentration Polar Grids (AE_SI25)
NSIDC encourages users to always work with the latest data (highest version number) available for a given date. Data from 19 June 2002 (start of the AMSR-E mission) to 26 January 2009 will be reprocessed to V10. We will send an announcement when reprocessing begins. More information on versions of AMSR-E data is available at the AMSR-E Versions Web page.
If you have questions, please contact NSIDC User Services.
20 March 2009
The Sea Ice Index has a new look: The redesigned Sea Ice Index Web site makes it easy to see monthly and daily sea ice conditions at a glance, as well as longer term trends in ice extent and concentration from satellite passive microwave data. Images can be displayed on NASA's Blue Marble view of the Earth. The site features tools for browsing and animating data images as well as downloading extent numbers.
12 March 2009
The NSIDC Antarctic Cryosphere Access Portal (A-CAP) now contains Antarctic ice flow velocity data from the VELMAP collection. For more information, see the A-CAP News announcement, Antarctic Ice Velocity Data Now Available through A-CAP.
25 February 2009
Beginning 11 March 2009, NSIDC will no longer offer distribution on hard media (CD-ROM, DVD,
DLT) for AMSR-E, MODIS, GLAS, or NISE data sets. Data will only be available via FTP Pull or FTP
Push.
For future orders, if you have trouble accessing data via FTP, please contact NSIDC's User Services Office for data access options.
18 February 2009
On 16 February 2009, NSIDC noticed significant problems with the Near-Real-Time (NRT) sea ice product. Upon investigation, the problem was found to be due to an issue with the DMSP F15 SSM/I 22 GHz frequency brightness temperature fields used as inputs into the sea ice algorithm. The problem began around 1 January 2009 and gradually worsened until it became noticeable in the sea ice product. NSIDC is working to correct the issue and provide reliable NRT sea ice data. In the meantime, F15 data since 1 January 2009 should not be used. The data sets affected by this problem are the following: The Sea Ice Index, Near-Real-Time DMSP SSM/I Daily Polar Gridded Brightness Temperatures, and Near-Real-Time DMSP SSM/I Daily Polar Gridded Sea Ice Concentrations.
18 February 2009
ICESAt/GLAS Release-29 data for the Laser 2B campaign (17 February 2004 to 21 March 2004) are now available for the following products: GLA01 to GLA05 and GLA07 to GLA11. This covers the atmospheric and engineering products only. The elevation/altimetry data products (GLA06 and GLA12 to GLA15) for Laser 2B are not available at this time. Please see the Release-29 Early Campaigns Altimetry Data Problem description for more information. See the ICESat/GLAS
Data Releases Web site for more information and a more complete description of this new release, or contact NSIDC User Services if you have any questions.
2 February 2009
NSIDC data is included in the newest version of Google Earth, launched today. The new Ocean in Google Earth feature contains NSIDC sea ice extent data and photographs showing glaciers shrinking through time. These and other NSIDC data products are also available to Google Earth users online via NSIDC's Virtual Globes Web page.
For more information about Google Earth, contact Google Press. For more information about the NSIDC data included in Google Earth, please contact NSIDC User Services. To contact members of the NSIDC press, please contact Stephanie Renfrow or +1 303.492.1497.
30 January 2009
ICESat/GLAS Release-29 data for the Laser 2A campaign (25 September 2003 to 18 November 2003) are now available for the following products: GLA01 to GLA05 and GLA07 to GLA11. This covers the atmospheric and engineering products only. The elevation/altimetry data products (GLA06 and GLA12 to GLA15) are not available at this time. Please see the Release-29 Early Campaigns Altimetry Data Problem description for more information. See the ICESat/GLAS
Data Releases Web site for more information and a more complete description of this new release, or contact NSIDC User Services if you have any questions.
29 January 2009
NSIDC has released thirteen single- and few-point data sets for access through the AGDC Antarctic Cryosphere Access Portal (A-CAP). These data sets include measurements from snow pits and ice cores across Antarctica. For more information, see the A-CAP news announcement, Single and Few-Point Data Sets Now Available.
26 January 2009
NSIDC is happy to announce our support for the UArctic Atlas, which was released on 23 January 2009. The UArctic Atlas provides a visual and geographic overview of the Arctic region, including its physical environment and socio-cultural life. The Atlas is organized into five general categories such as Natural Resources; Climate, Environment, and Ecosystems; and Peoples, Cultures, and Societies. Within each catagory, you will find various map layers which can be viewed either in a map viewer, in your browser, or opened in Google Earth.
This project was developed by the University of the Arctic, with map layer data provided by a number of partner organizations including NSIDC. One example of the type of data provided by NSIDC is the Circum-Arctic Map of Permafrost and Ground-Ice Conditions data set published by our Frozen Ground Data Center. The Atlas links users to the guide document for a particular data set as well as the associated Google Earth compatible files located on our Virtual Globes Web site.
23 January 2009
Production of MODIS Terra and Aqua snow and sea ice products have resumed, and both Terra and Aqua products are almost caught up.
15 January 2009
Due to a hardware failure on 29 December 2008, production of MODIS Terra and Aqua snow and sea ice products have been suspended indefinitely. On 08 January 2009, production of Terra snow and sea ice products resumed and is nearly caught up. Production of Aqua snow and sea ice products have not resumed. The problem is being worked, and we hope for production to resume in the near future.
12 January 2009
Additional data sets are now available from the Antarctic Cryosphere Access Portal (A-CAP). The data sets include elevation and ice thickness in Western Marie Bird Land, and laser altimetry of the Thwaites Glacier Catchment in Western Antarctica. Also, additional ice core locations have been added to the A-CAP Antarctic ice core overlay. For more information, see the A-CAP News Web page.
2008 Data News [top]
29 December 2008
The AIDJEX Documentary Film, available on DVD, describes a pilot study conducted in 1972 in preparation for the Arctic Ice Dynamics Joint Experiment's (AIDJEX) main experiment from 1975 to 1976. The study includes a main camp on drifting sea ice in the Beaufort Sea north of Alaska along with two satellite camps forming a station triangle with a 100 km side length. Please contact NSIDC User Services to obtain a copy of this DVD.
23 December 2008
Four additional data sets are now available via the Antarctic Cryosphere Access Portal (A-CAP). The newly available data sets include ice thickness, surface velocity of Taylor Glacier, and basemaps for accumulation and Surface Mass Balance (SMB). Read more about the new data sets on the A-CAP News Web page.
22 December 2008
ICESat/GLAS Release-29 data for the Laser 1A (20 February 2003 to 21 March 2003) and 1B (21 March 2003 to 29 March 2003) campaigns are now available for the following products: GLA01 to GLA05 and GLA07 to GLA09. This covers the atmospheric and engineering products only. The elevation/altimetry data products (GLA06 and GLA12 to GLA15) are not available at this time. Please see the Release-29 Laser 1A and 1B Altimetry Problem description for more information. See the ICESat/GLAS
Data Releases Web site for more information and a more complete description of this new release, or contact NSIDC User Services if you have any questions.
15 December 2008
Beginning on 01 December 2008, AMSR-E Level-2 and Level-3 Land products and Level-3 Snow products are Stage 1 validated. Stage 1 refers to the estimation of product accuracy by using a small number of independent measurements obtained from selected locations, time periods, and ground-truth/field program efforts. The Level-2 Land product and Level-3 Snow products transitioned from Transitional 08 (T08) to Validated 09 (V09). The Level-3 Land product transitioned from T05 to V06. No changes were made to the algorithms.
The products involved in this validation include the following:
AMSR-E/Aqua L2B Surface Soil Moisture, Ancillary Parms, & QC EASE-Grids(AE_Land)
AMSR-E/Aqua Daily L3 Surface Soil Moisture, Interpretive Parameters, & QC EASE-Grids (AE_Land3)
AMSR-E/Aqua L3 Global Snow Water Equivalent EASE-Grids (AE_DySno)
AMSR-E/Aqua 5-Day L3 Global Snow Water Equivalent EASE-Grids (AE_5DSno)
AMSR-E/Aqua Monthly L3 Global Snow Water Equivalent EASE-Grids (AE_MoSno)
4 December 2008
The data set, Subglacial topography: airborne geophysical survey of the Amundsen Sea Embayment, Antarctica (NSIDC-0292), is now available through the NSIDC Antarctic Cryosphere Access Portal (A-CAP). For more information, see the A-CAP announcement Web page.
1 December 2008
The online NSIDC Glacier Photograph Collection has doubled in size since January 2008, with more than 10,000 high-resolution photographs of glaciers worldwide available for free. For more information, see the full NSIDC press announcement Web page.
18 November 2008
NSIDC has released new ICESat/GLAS data. Release-29 data for the Laser 3J time period (17 February 2008 to 21 March 2008) are available for the following products: GLA01 - GLA09 and GLA12 - GLA15. Release-29 incorporates significant and extensive changes to the atmosphere processing, additions and corrections to the waveform and elevation processing, and the incorporation of new tide models. See the ICESat/GLAS
Data Releases Web site for more information and a more complete description of this new release, or contact NSIDC User Services if you have any questions.
14 November 2008
NSIDC would like to inform you that due to intermittent satellite maneuvers throughout the lifetime of Terra and Aqua, some geolocation information in MODIS data is incorrect. Data with erroneous geolocation information are being reprocessed to eliminate data that do not meet specifications. Reprocessing of all affected data is expected to be complete in Spring of 2009.
For information regarding the dates and times of the maneuvers with the affected data, visit the MODIS Land Quality Assessment Web site.
13 November
2008
NSIDC has recently updated the Northern Hemisphere
TOVS Pathfinder Path-P Daily and Monthly Polar Gridded Atmospheric Parameters data set. The data now span
July 1979 to December 2005. Additional changes to the Northern and Southern
TOVS data include a new file naming convention, a new FTP directory structure,
and tar-on-the-fly capabilities described in the readme.txt file on the
FTP site. Data set documentation and FTP access are available from the data set Web page. If you have any questions, please contact NSIDC
User Services.
14 October 2008
NSIDC is pleased to announce that the DMSP SSM/I Daily Polar Gridded Brightness Temperatures data set has been updated through June 2008. Data set documentation and FTP data access are available from the data set documentation. If you have any questions, please contact NSIDC User Services.
14 October 2008
Release-29 data for the Laser 3I time period (02 October 2007 to 05 November 2007) are available for the following products: GLA01 - GLA09 and GLA12 - GLA15. Release-29 incorporates significant and extensive changes to the atmosphere processing, additions and corrections to the waveform and elevation processing, and the incorporation of new tide models. See the ICESat/GLAS Data Releases Web site for more information and a more complete description of this new release, or contact NSIDC User Services if you have any questions.
8 October 2008
Reprocessing is complete for all AMSR-E/Aqua Level-3 products. Data from 19 June 2002 (the start of the AMSR-E mission) to present are now Version 2, the validated or transitional version of the algorithm. The Level 3 products include:
Land
AMSR-E/Aqua Daily L3 Surface Soil Moisture, Interpretive Parameters, & QC EASE-Grids (AE_LAND3)
Algorithm: Transitional 05
Rain
AMSR-E/Aqua Monthly L3 5x5 deg Rainfall Accumulations (AE_RnGd)
Algorithm: Validated 06 - Stage 2
Ocean
AMSR-E/Aqua Daily L3 Global Ascending/Descending .25x.25 deg Ocean Grids (AE_DyOcn)
AMSR-E/Aqua Weekly L3 Global Ascending/Descending .25x.25 deg Ocean Grids (AE_WkOcn)
AMSR-E/Aqua Monthly L3 Global Ascending/Descending .25x.25 deg Ocean Grids (AE_MoOcn)
Algorithm: Validated 03 - Stage 2
Sea Ice
AMSR-E/Aqua Daily L3 6.25 km 89 GHz Brightness Temperature Polar Grids (AE_SI6)
AMSR-E/Aqua Daily L3 12.5 km Brightness Temperature, Sea Ice Concentration, & Snow Depth Polar Grids (AE_SI12)
AMSR-E/Aqua Daily L3 25 km Brightness Temperature & Sea Ice Concentration Polar Grids (AE_SI25)
Algorithm: Transitional 08
Snow
AMSR-E/Aqua Daily L3 Global Snow Water Equivalent EASE-Grids (AE_DySno)
AMSR-E/Aqua 5-Day L3 Global Snow Water Equivalent EASE-Grids (AE_5DSno)
AMSR-E/Aqua Monthly L3 Global Snow Water Equivalent EASE-Grids (AE_MoSno)
Algorithm: Transitional 08
7 October 2008
Reprocessing is complete for all AMSR-E/Aqua Level-2B products. Data from 19 June 2002 (the start of the AMSR-E mission) to present are now Version 2, the validated or transitional version of the algorithm. The Level-2B products include:
Ocean
L2B Global Swath Ocean Products (AE_Ocean)
Algorithm: Validated 05 - Stage 3
Rain
L2B Global Swath Rain Rate (AE_Rain)
Algorithm: Validated 09 - Stage 2
Land
L2B Surface Soil Moisture, Ancillary Parameters, & QC EASE-Grids (AE_Land)
Algorithm: Transitional 06
29 September 2008
NSIDC is pleased to announce a recent update to the Bootstrap Sea Ice
Concentrations from Nimbus-7 SMMR and DMSP SSM/I data set. The daily
and monthly data have been updated and now span 26 October 1978 through
31 December 2007 for the northern and southern hemispheres.
For additional information on this data set or to access the data,
please see the data set documentation.
16 September 2008
NSIDC is pleased to announce that sea ice concentrations from AMSR-E/Aqua Daily L3 12.5 km Brightness Temperatures, Sea Ice Concentration, & Snow Depth Polar Grids (AE_SI12) were created as .kml files for use in Earth browsers, such as Google Earth. These files include the latest 30-day, 60-day, and 90-day animations of the daily sea ice concentrations and sea ice extent in the Arctic. The animations are updated daily and are available at the NSIDC Virtual Globes: Technical Experiments Web site.
If you have any questions, please contact NSIDC User Services.
15 August 2008
Reprocessing started for all AMSR-E Level 3 sea ice products with data from 19 June 2002, the start of the AMSR-E mission, and will continue through 5 July 2008. Forward processing began on 6 July 08. Reprocessing is expected to take several months to complete.
The following sea ice products are affected:
The algorithms for all Level 3 sea ice products are at the Transitional 08 (T08) level and incremented from Version 1 to Version 2. Sea ice temperature was removed from the AE_SI25 algorithm due to inherent ambiguities between changes in the physical temperature of the ice and changes in the ice emissivity; thus, the AE_SI25 product name also changed to AMSR-E/Aqua Daily L3 25 km Brightness Temperature & Sea Ice Concentration Polar Grids.
For a complete list of sea ice algorithm changes, as well ordering options and documentation, see the AMSR-E Data Versions Web page.
11 August 2008
Release-28 data for the Laser 2C time period (18 May 2004 to 21 June 2004) are available for the following products: GLA01 to GLA09 and GLA12 to GLA15. This is the first public release of Laser 2C data. Release-28 provides numerous enhancements, such as improved corrections for saturation effects, improved flags to aid users in data selection, and better descriptions of the altimetry products. See ICESat/GLAS Data Releases for more information, or contact User Services if you have any questions or for a more complete description.
05 August 2008
Due to an error in an ancillary data file, the following Version 2 AMSR-E Level 3 snow products were removed from NSIDC's archives:
- AMSR-E/Aqua Daily L3 Global Snow Water Equivalent EASE-Grids (AE_DySno)
- AMSR-E/Aqua 5-Day L3 Global Snow Water Equivalent EASE-Grids (AE_5DySno)
- AMSR-E/Aqua Monthly L3 Global Snow Water Equivalent EASE-Grids (AE_MoSno)
The bad ancillary data file creates an incorrect Snow Water Equivalent (SWE) flag. Any AMSR-E Level 3 snowfall data using the Transitional 08 Algorithm (T08) received from NSIDC prior to 23 July 2008 should not be used. The filename has the variable T08 in it.
Beginning 28 July 2008, new Version 2 AMSR-E Level 3 snow products were generated for 21 July 2008 and will continue with forward processing. Reprocessing will beginning with 19 June 2002, the start of the AMSR-E mission, and continue through 20 July 2008. The algorithm will remain at the T08 level.
For more information, contact NSIDC User Services.
04 August 2008
As of 06 July 2008, Version 2 of AMSR-E Level 3 land, rain, ocean, snow, and sea ice products are now available at NSIDC, and are considered Transitional (T) or Validated (V). The following is a listing of the Level 3 products.
Land Product (Algorithm: T05)
Rain Product (Algorithm: V06 - Stage 2)
Ocean Products (Algorithm: V03 - Stage 2)
Sea Ice Products (Algorithm: T07)
Snow Products (Algorithm: T08)
Delivered Algorithm Packages (DAPs) are also available for these products. If you are interested in receiving the DAP, or for more information, contact NSIDC User Services.
31 July 2008
NSIDC has created and released the MODIS Interactive Subsetting Tool (MIST) for public use. NSIDC created MIST in order to provide users with a 7 km by 7 km subset time series of certain Version 5 (V005) MODIS products over the Greenland Climate Network (GC-Net) and the International Arctic Systems for Observing the Atmosphere (IASOA) stations. MIST also provides limited online analysis capabilities that include generating time series and scatter plots. Data are provided in a text Comma Separated Value (CSV) file format, courtesy of the Oak Ridge National Laboratory Distributive Active Archive Center (ORNL DAAC). For more information, contact NSIDC User Services.
24 July 2008
Release-28 data for the Laser 3J time period (17 February 2008 to 21 March 2008) are available for the following products: GLA01 to GLA09 and GLA12 to GLA15. This is the first public release of Laser 3J data. Release-28 provides numerous enhancements, such as improved corrections for saturation effects, improved flags to aid users in data selection, and better descriptions of the altimetry products. See ICESat/GLAS
Data Releases for more information, or contact User Services if you have any questions or for a more complete description.
20 June 2008
NSIDC has recently updated the Sea Ice Trends and Climatologies from SMMR and SSM/I data products. These value-added products are now only derived from the Goddard Space Flight Center (GSFC) sea ice data sets: the NASA Team Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I Passive Microwave data set and the Bootstrap Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I data set. The NASA Team sea ice data now span 1979 – 2007, and the Bootstrap sea ice data now span 1979 – 2006.
For additional information on the sea ice trends and climatologies, please see the Sea Ice Trends and Climatologies from SMMR and SSM/I product Web site.
If you have any questions, please contact NSIDC User Services.
09 June 2008
Data are now available through December 2007 for the Sea Ice Concentrations from
Nimbus-7 SMMR and DMSP SSM/I Passive Microwave data set.
02 June 2008
Reprocessed Release-28 data are now available for the Laser 1A time period (20 February 2003 to 21 March 2003) for the products GLA05-GLA09 and GLA12-GLA15. Previously these data were released as 228 in the new file naming convention, but they have now been processed to the highest level of processing at 428. For further information on the differences between the 228 and 428 designations, please see the YXX Release Numbers document.
Release-28 provides numerous enhancements, such as improved corrections for saturation effects, improved flags to aid users in data selection, and better descriptions of the altimetry products. See ICESat/GLAS
Data Releases for more information, or contact User Services if you have any questions or for a more complete description.
22 April 2008
The Discovery, Access, and Delivery of Data for IPY (DADDI) search and access system is now available to all IPY data users. This interface provides access to Arctic data from the four DADDI partners: NSIDC, the Socioeconomic Data and Applications Center (SEDAC), The Oak Ridge National Laboratory Distributed Active Archive Center for Biogeochemical Dynamics (ORNL DAAC), and the Canadian Cryospheric Information Network (CCIN). In addition, all IPY data registered in the IPY Metadata Portal at the Global Change Master Directory (GCMD) are also searchable. The DADDI search system does not replace the GCMD but augments it by providing a different search and presentation interface, including filters and faceted search options. Direct links to data are included in the DADDI search output where sufficient information is provided from the data source.
Access to the DADDI search system is available through the IPY Data and Information Service (IPYDIS) and the DADDI Web page.
14 April 2008
To users of the EOS Data Gateway (EDG): Please note that the Warehouse
Inventory Search Tool (WIST)
will be replacing the EDG. At the end of April 2008, we are requesting
that registered users migrate your user accounts
and begin using WIST. We will send registered users an email with
further information on WIST and the migration
process. We also encourage guest users to begin using WIST
at the end of April. For more information, contact User
Services.
31 March 2008
Release-28 data for the Laser 3I time period (02 October 2007 to 05 November 2007) are available for the following products: GLA01 - GLA09 and GLA12 - GLA15. This is the first public release of Laser 3I data. Release-28 provides numerous enhancements, such as improved corrections for saturation effects, improved flags to aid users in data selection, and better descriptions of the altimetry products. See ICESat/GLAS
Data Releases for more information, or contact User Services if you have any questions or for a more complete description.
04 March 2008
NSIDC has released the Greenland Ice Sheet Melt Characteristics Derived from Passive Microwave Data data set which is a binary indicator of the state of melt of each pixel on the Greenland ice sheet for each day of observation. The Greenland ice sheet melt extent data, acquired as part of NASA's Program for Arctic Regional Climate Assessment (PARCA) program, is a daily estimate of the spatial extent of wet snow on the Greenland ice sheet since 1979. It is derived from SSM/I and SMMR passive microwave satellite brightness temperature characteristics using the cross-polarized gradient ratio (XPGR) of Abdalati and Steffen (1997). The data are provided in a variety of formats including raw data in ASCII format, data in binary format gridded on a Greenland subset of the Northern Hemisphere polar stereographic projection, and annual and complete time series climatologies in binary and GeoTIFF format all at a resolution of 25 km. All data are available via FTP.
22 February 2008
NSIDC has released the Global EASE-Grid 8-day Blended SSM/I and MODIS Snow Cover data set suitable for continental- to hemispheric-scale seasonal fluctuations of snow covered area (SCA) and snow water equivalent (SWE). This data set comprises global, 8-day SWE data from 2000 through 2007, enhanced with snow-covered area derived from MODIS visible wavelength bands.
The new data set blends visible and microwave data at higher temporal resolution (8-day) than NSIDC has offered before; and it is our first snow cover product to be released in netCDF format, specifically at the request of modelers.
Produced in the 25-kilometer Equal-Area Scaleable Earth Grid (EASE-Grid), the new product is unique in blending information from both passive microwave and visible sensors on a global scale for the period when both types of sensor data are available.
16 January 2008
The AVHRR Polar Pathfinder Twice-Daily
5 km EASE-grid Composites data set has been updated. This update
extends the time series to 30 June 2005. The data in this update is
still considered Version 3. This update includes:
- A change in filename to now include the platform, for example, a14_s005_1996001_1400_albd.v3
where: a14 = NOAA-14.
- Data beginning on day 2001060 are collected by AVHRR on NOAA-16.
- A dual Channel 3 is now included for better cloud detection. Channel
3A collects data during the day at 1.6 microns, and Channel 3B collects
data during the night at 3.7 microns.
- Due to a problem with the NOAA-16 scan motor, all the channel data
is shifted sporadically between 2001 and 2005, causing the channels
to contain data from another channel; thus, the derived parameters
also contain errors during this time-period. See Table
12 in the Error Sources section of the data set documentation for
specific dates.
2007 Data News [top]
29 December 2007
Erroneous MODIS Version 005 Snow Cover Data
The MODIS/Terra and MODIS/Aqua Snow Cover Daily L3 Global 0.05Deg CMG
data products (MOD10C1.v005 and MYD10C1.v005) and the Snow Cover 8-Day
L3 Global 0.05Deg CMG data products (MOD10C2.v005 and MYD10C2.v005) were
processed with corrupted tile indices as a result of incorrect static
input files. Static input files determine and map each tile pixel to
the corresponding 0.05-degree pixel in the CMG lat-lon grid.
Reprocessing of the erroneous data for 2003 and 2004 is complete. NSIDC
expects to receive 2007 reprocessed data by 07 December 2007. For more
detailed information about the errors, please visit the MODIS
Land Science Data Discipline Team Web site.
Affected Dates for
Terra Product |
| Year |
Julian Day |
Through |
Year |
Julian Day |
| 2003 |
065 |
through |
2003 |
137 |
| 2004 |
192 |
through |
2004 |
263 |
| 2007 |
001 |
through |
2007 |
307 |
Affected Dates for
Aqua Product |
| Year |
Julian Day |
Through |
Year |
Julian Day |
| 2003 |
065 |
through |
2003 |
137 |
| 2004 |
192 |
through |
2007 |
260 |
| 2007 |
001 |
through |
2007 |
307 |
17 December 2007
World Glacier
Inventory: More than 34,000 glaciers in China have been
added to the World Glacier Inventory. For more information, please
see the Quality
Assessment and History of Updates section of the data set documentation.
To access the new data from this update, proceed to the World
Glacier Inventory search page and select "CAREERI, Lanzhou,
China. Che/Wu" from the Data Contributor pull-down menu.
11 December 2007
Loss of AMSR-E Aqua GBAD Data
On 2 December 2007, an anomaly developed on the Aqua spacecraft which
prevented the production of Ground Based Attitude Determination (GBAD)
data. Due to the loss of GBAD data, AMSR-E data production was stopped.
Data production resumed on 7 December 2007; however, products are slightly
delayed. Production is expected to return to normal by 12 December. All
data for 2 December through 6 December is expected to be recovered and
will be available from NSIDC.
27 November 2007
NSIDC is exhibiting at the 2007 American Geophysical Union (AGU) Fall
Meeting in San Francisco from December 11 - 14. Please stop by and visit
NSIDC staff at Booth No. 139.
12 November 2007
NOAA@NSIDC has published Sea Ice
Charts of the Russian Arctic in Gridded Format, 1933-2006.
These data, from the Arctic and Antarctic Research Institute in St.
Petersburg, Russia, are an important new data source for those studying
the role of sea ice in climate change.
30 October 2007
NSIDC Metadata Now Accessible: Collection-level metadata are now available
on NSIDC's Web site for all data products. You can view this metadata
in three different ways: from the catalog page, from a utility, or from
an FTP site. The catalog page for each data set now includes a View Metadata
Record link below the data set summary, which accesses a dynamically-generated
Web page with metadata that conform to the Global Change Master Directory
(GCMD) Directory Interchange Format (DIF) standard (see
example). Additional metadata output options on this Web
page include DIF in plain text, DIF in Extensible Markup Language (XML),
and U.S. Federal Geographic Data Committee (FGDC) Content Standard for
Digital Geospatial Metadata (CSDGM) in Hypertext Markup Language (HTML),
plain text, and XML. Also, included on this Web page is an interactive
Google Map that displays the spatial coverage for the data set.
The second way to view metadata is by using the same utility that created
the dynamically-generated Web page to construct your own Web page with
your own format and style. For more information on how to do this, please
see the get_metadata.pl Web
page. In addition, metadata for all of our holdings are also available
in XML files for both DIF and FGDC standards at the following FTP site: ftp://sidads.colorado.edu/pub/incoming/metadata/.
Updated on a daily basis, these FTP folders are provided to allow other
organizations to regularly harvest our metadata collection for inclusion
in data discovery and access portals.
18 October 2007
ICESat/GLAS: Release-28
data for the Laser 3C time period (20 May 2005 to 23 June 2005) are available
for the following products: GLA01 - GLA09 and GLA12 - GLA15. This is
the first public release of Laser 3C data*, and it is another release
of GLAS data with the satellite's attitude in "airplane" mode.
Please contact User Services for a more complete description. *Release-28
provides numerous enhancements, such as improved corrections for saturation
effects, improved flags to aid users in data selection, and better descriptions
of the altimetry products. See ICESat/GLAS
Data Releases for more information.
27 September 2007
Today's update to the Glacier
Photograph Collection includes 50 photographs taken
between 1890 and 1996. Represented in this batch are Colorado glacier
photographs taken by Junius Henderson, Oscar A. Randolph, Rudolph
Johnson, and Russell Allen. The glaciers are Andrews, Arapaho, Fair,
Isabel, Mills, Saint Vrain and Taylor. Other photos include a series
of Franz Josef Glacier (1951-1964), and Harry Fielding Reid images
of John Muir's cabin taken in 1890.
25 September 2007
ICESat/GLAS: Release-28
data for the Laser 3F time period (24 May 2006 to 26 June 2006) are available
for the following products: GLA01 - GLA09 and GLA12 - GLA15. This is
the first public release of Laser 3F data*, and it is also the first
release of GLAS data with the satellite's attitude in "airplane" mode.
Depending on the time of year, the satellite's attitude is changed from
airplane to sailboat to accommodate sun angle changes and for power and
thermal stability. *Release-28 provides numerous enhancements, such as
improved corrections for saturation effects, improved flags to aid users
in data selection, and better descriptions of the altimetry products.
20 September 2007
The complete times series of Version 4 data for the MODIS/Terra Snow
Cover 8-day L3 Global 500m Grid (MOD10A2) product
and the MODIS/Terra Snow Cover 8-day L3 Global 0.05Deg CMG (MOD10C2) product
are now available from the Data
Pool and will remain available indefinitely. The time series extends
from Feb 2000 through Dec 2006.
20 September 2007
The complete times series of Version 2 data for the Near-Real-Time SSM/I EASE-Grid Daily Global Ice Concentration and Snow Extent product
is now available from the Data
Pool and will remain available indefinitely. The time series extends
from 04 May 1995 through present.
04 September 2007
ICESat/GLAS: Release-28
data for the Laser 3H time period (12 March 2007 to 14 April 2007) are
available for the following products: GLA01 - GLA09 and GLA12 - GLA15.
This is the first public release of Laser 3H data. This release provides
numerous enhancements, such as improved corrections for saturation effects,
improved flags to aid users in data selection, and better descriptions
of the altimetry products.
September 2007
NOAA@NSIDC is pleased to announce updates to the Glacier
Photograph Collection. More than 1,200 photographs of
Greenland glaciers have been digitized from slides and are available
online for viewing and downloading. The Greenland photograph collection
was donated to the World Data Center for Glaciology, Boulder in the
mid 1980s by Captain Ron Kollmeyer of the U.S. Coast Guard. Captain
Kollmeyer was the lead for the Greenland Glacier Survey. The photographs
of western Greenland glaciers were taken between 1969 and 1980, from
ground observation stations and from U.S. Coast Guard helicopters
at an altitude between 100 and 1,000 feet. To access the new data
from this update, proceed to http://nsidc.org/data/glacier_photo/photo_query.html and
select "Country" from the available search options. On the next screen
choose "Greenland (DK)" from the Country pull-down menu.
07 August 2007
AMSR/ADEOS-II
L1A Raw Observation Counts (AMSR-L1A), Version 2: This
data set is now available from NSIDC. The data are available for
28 January until 24 October 2003, when the satellite was lost, and
are restricted to NASA approved users. For information on becoming
a NASA approved user, please go to the Order
Data Web page, and refer to the information under the column
heading: First Time Users of AMSR/ADEOS-II Data.
August 2007
The World Glacier Inventory has
recently been updated. Over 1,600 glaciers from the former Soviet Union
were added and errors with 368 glacier IDs were identified and corrected.
For more information, please see the "Quality Assessment and History
of Updates" section in the data set "Documentation" for further details
about these updates. To access the new data from this update, proceed
to the World Glacier Inventory
search page, and select "Institute of Geography, Russian Academy
of Science. Chernova" from the Data Contributor pull-down menu.
26 July 2007
Trapped Gas Composition and
Chronology of the Vostok Ice Core: This AGDC data set
includes a time scale for the Vostok ice core, retrieved from Vostok
Station on the East Antarctic Plateau. Investigators analyzed the
molecular oxygen to nitrogen (O2/N2) ratios
and the delta oxygen-18 (δ18O) record for approximately
the past 115,000 to 400,000 years in the Vostok ice core.
10 July 2007
Carbon-13 Isotopic Composition
of Atmospheric Methane in Firn Air, Siple Dome, Antarctica: This
AGDC data set includes records of the delta carbon-13 (d13C) of methane
(CH4) in firn air from the South Pole and trapped in bubbles in a
short ice core from Siple Dome, Antarctica. Using two firn air samples,
investigators reconstructed records of the isotopic composition of
paleoatmospheric methane covering the last 2 centuries, from 1820
to 2001.
10 July 2007
Radar Investigations of Antarctic
Ice Stream Margins, Siple Dome, 1998: This AGDC data
set consists of surface-based radar measurements, including geometry
of the bed, surface, and internal layers, and bed reflectivity measurements
at two sites along ice stream margins at Siple Dome, Antarctica.
30 June 2007
March through August Ice Edge Positions
in the Nordic Seas, 1750-2002: This new NOAA data set
contains ice edge positions from ship logbooks, diaries, and other
sources, in addition to more recent satellite data products. Data
are available as ASCII text, browse images, and as shapefiles (GIS
format). This long record sheds light on ice edge variability through
regional shifts in climate.
21 June 2007
GLAS/ICESat
Laser Altimetry Digital Elevation Models (DEMs) of Antarctica and
Greenland: These two new digital elevation models (DEMs)
of Antarctica and Greenland were derived from GLAS/ICESat laser altimetry
profile data and provide new surface elevation grids of the ice sheets
and coastal areas, with greater latitudinal extent and fewer slope-related
effects than radar altimetry. These DEM data sets were generated
from the first seven operational periods (from February 2003 through
June 2005) of the GLAS instrument. They are provided on polar stereographic
grids at 500 m grid spacing for Antarctica and 1 km grid
spacing for Greenland.
8 June 2007
Cosmogenic Radionuclides in
the Siple Dome A Ice Core: This AGDC data set includes
a record of cosmogenic radionuclide concentrations in the Siple Dome
A ice core collected as part of the West Antarctic ice core program.
The investigators measured profiles of both 10Be and 36Cl
in the entire ice core, which spans the time period from the present
to about 100,000 years before present.
22 May 2007
Paleoenvironment, Geomorphic Processes,
and Carbon Stocks of Drained Thaw-lake Basins in the Arctic Coastal
Plain, Alaska, USA, 2002-2005: This ARCSS data set is
from a study of the origin and associated geomorphological, ecological,
and pedological processes of thaw-lake basins of the Arctic Coastal
Plain, Alaska. Investigators used radiometric dating, microfossil
analysis, and soil development to determine whether carbon accumulation
rates respond to regional changes in climate, or if they are influenced
by local rates of plant succession.
18 May 2007
High-Resolution Rectified Aerial
Photography for Collaborative Research of Environmental Change at
Barrow, Alaska, USA: This ARCSS data set includes aerial
photography of Barrow, Alaska, which has been geocorrected to a 2002
QuickBird satellite image or Interferometric Synthetic Aperture Radar
(IFSAR) imagery. Photography included in the set is from eight specific
dates, which span from 1948 to 1997: 4 August 1948, 29 July 1949,
12-14 August 1955, 12-24 August 1962, 14 July 1964, 15 July 1979,
31 August 1984, and 16 July 1997.
9 May 2007
ICESat/GLAS: Release-28
data for the Laser 1 time period (20 February 2003 to 21 March 2003)
are available for the following products: GLA01 - GLA09 and GLA12 - GLA15.
This release provides numerous enhancements, such as improved corrections
for saturation effects, improved flags to aid users in data selection,
and better descriptions of the altimetry products.
7 May 2007
NSIDC Atlas of the Cryosphere: The NSIDC
Atlas of the Cryosphere is a dynamic mapping Web site that allows
the visitor to explore the Earth's frozen regions. Viewed from a polar
perspective, the available scenes includes snow cover, sea ice extent
and concentration, glaciers, permafrost, and other critical components
of the Earth's cryosphere. The user can zoom in to a specific region
on the Earth as well as overlay country borders, major cities, and
other geographic information.
24 April 2007
ICESat/GLAS: Release-28
data for the Laser 3G time period (25 October 2006 to 27 November 2006)
are available for the following products: GLA01 - GLA09 and GLA12 - GLA15.
This release provides numerous enhancements, such as improved corrections
for saturation effects, improved flags to aid users in data selection,
and better descriptions of the altimetry products.
22 April 2007
Good Days on the Trail, 1938-1942 was
shown as part of the University of Colorado International Film Series.
The film, with color footage of CU students on alpine hikes, provides
a glimpse into the mountaineering lifestyle of an earlier time, along
with shots of Arapaho Glacier and other Front Range glaciers. Scientists
from NSIDC and the CU Institute of Arctic and Alpine Research narrated.
The film is being preserved and digitized with support from the NOAA
National Geophysical Data Center and the Climate Database Modernization
Program.
30 March 2007
ICESat/GLAS: Release-28
data for the Laser 2A time period (25 September 2003 to 18 November 2003)
are available for the following products: GLA01 - GLA09 and GLA12 - GLA15.
This release provides numerous enhancements, such as improved corrections
for saturation effects, improved flags to aid users in data selection,
and better descriptions of the altimetry products.
19 March 2007
Vertical Strain at Siple Dome,
Antarctica, 1999-2002: This AGDC data set consists of
a table of long-term average strain rates measured between 1999 and
2002 at Siple Dome, Antarctica as a part of the West Antarctic Ice
Sheet Cores (WAISCORES) project for deep ice coring in West Antarctica.
19 March 2007
Model Output Assessing Net Carbon
Exchange Across the Arctic Tundra-Boreal Forest Transition in Alaska,
1981-2000: This ARCSS data set includes simulated temporal
and spatial patterns of net carbon exchange in Alaskan ecosystems
that span the transition from Arctic tundra to boreal forest. Investigators
modeled net carbon storage along with vegetation and soil carbon
and nitrogen pools in tundra, shrub tundra, and tree line evergreen
conifer forest ecosystems using the Terrestrial Ecosystem Model (TEM)
5.0.
16 February 2007
Oxygen and Deuterium Isotope Measurements
from Siberia, 2002-2004: This ARCSS data set contains
measurements from a stable isotope analysis of rain, snow, the Kolyma
River, and a local stream near Cherskii, Siberia. As part of the
Russian-American Initiative on Shelf-land Environments (RAISE) program,
this research was designed to quantify the impacts of disturbance
on the seasonal cycle of atmospheric carbon dioxide and the discharge
of carbon and nitrogen into the Arctic Ocean in forest and shrubby
tundra regions.
26 January 2007
Mooring and Drifting Buoy Data:
Beaufort Gyre Freshwater Experiment, 2003: This brokered
product, supported by the ADCC, contains temperature time series,
salinity, current, sea ice draft, and bottom pressure measurements.
Investigators established an observational program to measure the
freshwater content (in sea ice and in the ocean) of freshwater fluxes
in the Beaufort Gyre using moorings and drifting buoys during the
summer of 2003.
17 January 2007
ICESat/GLAS: Release-28
data for the Laser 3A time period (03 October 2004 to 08 November 2004)
are available for the following products: GLA01 - GLA09 and GLA12 - GLA15.
This is the first public release of Laser 3A data for some altimetry
products. This release provides numerous enhancements, such as improved
corrections for saturation effects, improved flags to aid users in data
selection, and better descriptions of the altimetry products.
16 January 2007
MODIS/Terra: The complete
time series of MODIS/Terra Snow Cover Daily L3 Global 0.05Deg CMG V004
(MOD10C1 V004) data is now available through the online Data
Pool and will remain there indefinitely.
16 January 2007
MODIS/Aqua Version 5 Snow and
Sea Ice Products: NSIDC is pleased to announce the release
of Version 5 (V005) reprocessed MODIS/Aqua snow products, which contain
several improvements over the previous versions. For example, monthly
snow products are available in a Climate Modeling Grid (CMG) format,
fractional snow cover was added to MYD10_L2 and MYD10A1 products,
browse images are available for all products, Sea Ice by Ice Surface
Temperature (IST) and combined sea ice fields were removed, and all
products use HDF compression making the file size much smaller.
2006 Data News[top]
28 December 2006
MODIS/Terra Version 5 Snow
Products: NSIDC is pleased to announce the release of
Version 5 (V005) reprocessed MODIS/Terra snow products, which contain
several improvements over the previous versions. For example, monthly
snow products are available in a Climate Modeling Grid (CMG) format,
fractional snow cover was added to MOD10_L2 and MOD10A1 products,
browse images are available for all products, and all products use
HDF compression making the file size much smaller.
27 December 2006
ICESat/GLAS: Release-28
data for the Laser 3B time period (17 February to 24 March 2005) are
available for the following products: GLA01 - GLA09 and GLA12 - GLA15.
This release provides numerous enhancements, such as improved corrections
for saturation effects, improved flags to aid users in data selection,
and better descriptions of the altimetry products.
20 December 2006
Coring Data from Drained Thaw-Lake
Basins of the Arctic Coastal Plain, Alaska: This ARCSS
data set includes measurements and observations from drained thaw-lake
basin (DTLB) cores retrieved from Barrow and Atqasuk, Alaska in April
and August of 2001 through 2003.
8 December 2006
MODIS/Terra Version 5 Sea
Ice Products: NSIDC is pleased to announce the release
of Version 5 (V005) reprocessed MODIS/Terra sea ice products, which
contain several improvements over the previous versions. For example,
Sea Ice by Ice Surface Temperature (IST) and combined sea ice fields
were removed, browse images are now available, and all V005 products
use HDF compression making the file size much smaller.
8 December 2006
AMSR-E/Aqua Daily EASE-Grid
Brightness Temperatures: NSIDC produces AMSR-E gridded
brightness temperature data by interpolating AMSR-E data to the output
grids from swath space using an inverse-distance squared method.
Data for the Northern Hemisphere and Southern Hemisphere EASE-Grid
projections, at 25 km resolution, are now available. Data begin 19
June 2002, and processing is ongoing.
7 December 2006
SHEBA Upper Ocean CTD and Thermal
Microstructure, Western Arctic Ocean: This ARCSS data
set includes conductivity, temperature, and depth (CTD) measurements
along with turbulent thermal variance, turbulent kinetic energy,
and vertical temperature gradient data collected from 12 October
1997 to 30 September 1998 in the Western Arctic Ocean.
14 November 2006
ICESat/GLAS: Release-28
data for the Laser 2B time period (17 February to 21 March 2004) are
available for all 15 GLAS products (GLA10 and GLA11 coverage to 4 March
2004). This release provides numerous enhancements, such as improved
corrections for saturation effects, improved flags to aid users in data
selection, and better descriptions of the altimetry products.
8 November 2006
National Ice Center Sea Ice Charts
and Climatologies in Gridded Format: The U.S. National
Ice Center (NIC) is an interagency NOAA, Navy, and Coast Guard operational
sea ice analysis and forecasting center. Since 1972, NIC has produced
weekly or biweekly Arctic and Antarctic sea ice charts. These analyses
are produced using available in situ, remotely sensed, and model
data sources. They are generated primarily for mission planning and
safety of navigation. Overall, the record of sea ice concentration
from the NIC series is believed to be more accurate than that from
passive microwave sensors, especially from the mid-1990s on. This
data set is an Arctic sea ice concentration climatology derived from
the chart series. The climatology consists of median, maximum, minimum,
first quartile, and 3rd quartile concentrations as well as frequency
of occurrence of ice at any concentration for 33 year, 10 year, and
5 year periods.
7 November 2006
Atmospheric Nitrate Isotopic
Analysis at Amundsen-Scott South Pole Station, A Twenty-Five Year
Record:This AGDC data set contains snow pit measurements
of oxygen isotopes in nitrate and ion concentrations, along with
supplementary surface measurements of oxygen isotopes in nitrate
and in nitrate aerosols from the Amundsen-Scott South Pole Station,
Antarctica.
1 November 2006
Resource Allocation and Allometry
of Plant Growth at Selected Sites in the Arctic: 2003-2005 Growing
Seasons: This ARCSS data set consists of measurements
from Arctic field sites during the summer months from 5 July 2003
to 5 August 2005 as part of the Land-Atmosphere-Ice Interactions
(LAII) International Tundra Experiment (ITEX). Investigators designed
this research, which compares an extensive range of vegetation types
that exists in widely-separated sites, to help identify the relative
vulnerability of different vegetation types, plant functional types,
and species to climate change and other forms of disturbances.
31 October 2006
Subglacial Topography: Airborne
Geophysical Survey of the Amundsen Sea Embayment, Antarctica: This
AGDC data set includes 5 km gridded data from the Airborne Geophysical
Survey of the Amundsen Sea Embayment, Antarctica (AGASEA) conducted
during the 2004-2005 austral summer. Investigators derived maps of
the ice sheet surface and subglacial topography, which covers the
entire catchments of both the Thwaites Glacier and the Pine Islands
Glacier, from airborne survey systems mounted on a Twin Otter aircraft.
30 October 2006
ICESat/GLAS: Release-28
data for the Laser 3D time period (21 October 2005 to 24 November 2005)
are available for the following products: GLA01 - GLA09 and GLA12 - GLA15.
This release provides numerous enhancements, such as improved corrections
for saturation effects, improved flags to aid users in data selection,
and better descriptions of the altimetry products.
25 October 2006
Sea Ice Concentrations from
Nimbus-7 SMMR and DMSP SSM/I Passive Microwave Data:
An update for this product is now available. Changes include new “preliminary” data
for users who need more current data, new file naming, a new FTP
directory structure, and updated documentation.
25 October 2006
Near-Real-Time DMSP SSM/I Daily
Polar Gridded Sea Ice Concentrations: An update for
this product is now available. Changes include new binary data format,
new file naming, a new FTP directory structure, and updated documentation.
18 October 2006
AWS Data: Characteristics of
Snow Megadunes and Their Potential Effect on Ice Core Interpretation: This
AGDC data set contains automated weather station (AWS) data from
two sites on the East Antarctic Plateau where investigators conducted
field research on the Antarctic megadunes. The stations collected
snow/firn temperature, air temperature, air pressure, and wind data
from 16 January 2004 to 17 November 2004.
16 October 2006
ICESat/GLAS: Release-28
data for the Laser 3E time period (22 February 2006 to 27 March 2006)
are available for the following products: GLA01 - GLA09 and GLA12 - GLA15.
This release provides numerous enhancements, such as improved corrections
for saturation effects, improved flags to aid users in data selection,
and better descriptions of the altimetry products. See ICESat/GLAS
Data Releases for more information, including details about a change
in file names with this release.
29 September 2006
Monthly Mean Precipitation Sums
at Russian Arctic Stations, 1966-1990: This NOAA data
product includes measurements from 216 Russian Arctic stations to
fill gaps in the historical precipitation record that are needed
for applications including reanalysis validation and study of changing
climate.
28 September 2006
Time Series of Seasonally Frozen
Ground Depth in the Russian Arctic, 1930-1990: This
ARCSS data set consists of seasonally frozen ground depth measurements
based on soil temperatures in the Russian Arctic. Investigators constructed
a record that extends from 1930 to 1990 using data from 211 ground-based
stations.
28 September 2006
Estimating Sea Ice Floe Velocities
to Characterize Whaling Seasons Using Satellite Imagery of the Chukchi
and Beaufort Seas, Spring 2000 and 2001: This ARCSS
data set contains SAR images from the RADARSAT and the ERS - 2 satellites
along with broadband visible and infrared images from the AVHRR satellite.
Data cover two spring whaling seasons in the Chukchi and Beaufort
Seas from March to June in 2000 and 2001.
15 September 2006
Submarine Upward Looking Sonar Ice
Draft Profile Data and Statistics: Sixteen cruises were
added to this NOAA@NSIDC data set, markedly increasing the spatial
and temporal coverage of these data that are used for sea ice thickness
estimates.
22 August 2006
Firn Air Chemistry
Observations from Siple Dome, 1996, and the South Pole, 2001: This
AGDC data set includes gas ratios in polar firn air. Investigators
sampled air from bubbles in the firn-ice transition region to observe
and model the processes of gravitational settling, thermal fractionation,
and preferential exclusion within the Antarctic snowpack.
31 July 2006
DMSP SSM/I Daily Polar Gridded
Brightness Temperatures: NSIDC is now distributing Version
2 of this data set. Changes include reprocessing to correct an error
in 1987-1999 data, full distribution via FTP, conversion from HDF
to binary, and a new file naming convention. See
the online documentation for more information.
21 July 2006
North Pole Environmental
Observatory PMEL/CRREL 2000-2003 Ice Temperature and Mass Balance
Buoy Data: This ADCC data set contains ice temperature
and mass balance data from drifting ice buoys near the North Pole
in the Central Basin of the Arctic Ocean. Buoys were deployed each
April by the Pacific Marine Environmental Laboratory (PMEL) and the
Cold Regions Research and Engineering Laboratory (CRREL).
13 June 2006
GPR and GPS
Data: Characteristics of Snow Megadunes and their Potential Effects
on Ice Core Interpretation: This AGDC data set contains
ground penetrating radar (GPR) data showing surface morphology and
internal layering structure along with global positioning system
(GPS) data collected within an area of 60 km2 on the East
Antarctic Plateau.
24 May 2006
ICESat/GLAS: Release-26
data for the Laser 2A time period (25 September to 18 November 2003)
are available for the following products: GLA01 - GLA15. See ICESat/GLAS
Data Releases for more information.
4 May 2006
ICESat/GLAS: Release-26
data for the Laser 2B time period (17 February to 21 March 2004) are
available for the following products: GLA01 - GLA015. See ICESat/GLAS
Data Releases for more information.
10 March 2006
Repeat
Photography of Glaciers: This collection matches photos
of glaciers taken as early as the 1890s with recent photos taken
at the same physical location. The photos tell a captivating visual
story of the changes glaciers have experienced through time.
17 March 2006
ICESat/GLAS: Release-26
data are available for the following products: GLA01 - GLA09 and GLA12
- GLA015. This release covers the Laser 3D time period (21 October to
24 November 2005). Significant changes to the altimetry products include
a range correction for saturation and several changes to the alternate
fit waveforms. Several new MET parameters were added to the atmospheric
products. See ICESat/GLAS
Data Releases for more information.
14 February 2006
Northern Hemisphere Seasonal and
Intermittent Frozen Ground Areas 1901-2000: This FGDC
data set contains monthly values of the total exposed land area of
seasonally frozen ground and annual values for intermittently frozen
ground in the Northern Hemisphere. Seasonally frozen ground is defined
as the near-surface soil that experiences freeze for more than 15
days per year, while intermittently frozen ground experiences fewer
than 15 days of freeze per year.
13 February 2006
Cloud-Radiation Feedback: Boundary
Layer Cloud Microphysical Properties and Processes: This
ADCC data set contains Surface Heat Budget of the Arctic (SHEBA)
cloud microphysical data collected onboard the National Center for
Atmospheric Research (NCAR) C-130 aircraft.
13 February 2006
Compilation of Antarctic Radar
Data, Siple Coast, 2000-2002: This AGDC data set contains
ground-based, ice-penetrating radar profiles across satellite-detected
lineations and terrains that were taken in the lower reaches of Ross
Ice Stream C, also known as the Kamb Ice Stream (KIS); on Roosevelt
Island; on the Siple Dome; and on the Shabtaie Ice Ridge.
13 February 2006
SMEX02 Land Surface Information:
Soils Database: This Advanced Microwave Scanning Radiometer
- Earth Observing System (AMSR-E) data set includes ESRI shapefiles
containing geographic information such as railroads, roads, and stream
locations; drainage features; political boundaries; and soil classifications
for 10 Iowa counties.
7 February 2006
Arctic EASE-Grid Freeze and Thaw
Depths, 1901 - 2002: This FGDC data set contains mean,
median, minimum and maximum freeze and thaw depths for each year
from 1901 to 2002 on the 25 km EASE-Grid for areas north of 50°.
Freeze and thaw depths are estimated using a variant of the Stefan
solution that uses an edaphic factor and freezing or thawing indices
as inputs.
6 January 2006
Timing and Statistics of Autumn
and Spring Annual Snow Cover for the Northern Hemisphere: This
NOAA data set includes the timing of snow cover onset in the fall,
the timing of last observed snow cover in the spring and the snow-free
duration from 1972 to 2000.
6 January 2006
The Dehn Collection of Arctic Sea
Ice Charts, (1953-1986): This NOAA data set includes
almost 4,000 charts that have been scanned and are now available
online. A search and order interface allows users to submit orders
for high-resolution TIFF images. |
NSIDC Data News
