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
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.