Data Announcements

12 September 2019

NOAA@NSIDC is pleased to announce that the NOAA Polar Orbiting Satellite (POES) Global Visible and Infrared Band Data from ESSA (1966 – 1972) and NOAA (1972 – 1978) Satellites, Version 1 data set, is now available at the National Snow and Ice Data Center (NSIDC). This data set consists of daily visible-band (VIS) imagery and infrared-band (IR) imagery from the Environmental Sciences Service Administration (ESSA) satellites, the Improved TIROS Operational System 1 (ITOS 1) satellite, and the National Oceanic and Atmospheric Administration (NOAA) satellites covering December 1966 through March 1978 (IR data begin in December 1972). The data set was created by scanning the analog imagery from these satellites held in the NOAA National Centers for Environmental Information (NCEI) physical archives in Asheville, NC. Images on 35 mm film, glossy prints, or paper halftone prints were scanned, processed, and reformatted. The data... more

8 August 2019

NOAA@NSIDC is pleased to announce that the NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 3 data set is now available through 2018. This data set provides a Climate Data Record (CDR) of sea ice concentration from passive microwave data. It provides a consistent, daily and monthly time series of sea ice concentrations from 09 July 1987 through 31 December 2018 for both the north and south polar regions on a 25 km x 25 km grid. Note that the 2018 data for near-real-time version of this data set called Near-Real-Time NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 1 has been removed since the final processed version supersedes the NRT version. If you have the 2018 NRT data, we suggest that you download and replace it with the 2018 final processed version of this data set.

NOAA/NSIDC Climate Data Record of Passive... more

11 July 2019

NOAA@NSIDC is pleased to announce that the Sea Ice Index has been updated from near-real-time data to final data for the time period 01 January 2018 through 31 December 2018.

Initially, when the Sea Ice Index is first processed, it uses a near-real-time (NRT) sea ice concentration product as it input. This NRT product can contain missing data and has less quality control procedures applied to it than the final sea ice concentration input product provided by NASA Goddard. However, the final input product often lags behind the present by approximately a year. Using the NRT product allows the Sea Ice Index to provide sea ice extent and concentration data for the previous day. When the final NASA Goddard sea ice concentration product becomes available, NOAA@NSIDC reprocesses the data for that time period so that the more tightly quality controlled and gap filled input data are used for the Sea Ice Index computations. To access the newest data, please visit the... more

8 July 2019

The Snow Data Assimilation System (SNODAS), Version 1 data set, accessible through the NOAA program at the National Snow and Ice Data Center (NOAA@NSIDC), was updated to correct for an extra “./“ in some of the data file paths. Users accessing this data set through a script may need to update their scripts to account for this correction.

In addition, the filename extensions for the uncompressed header files (.hdr) have been renamed to text (.txt) format. The decision to rename the file extensions was made to reduce users confusing these with standard .hdr files read by software packages like ENVI or ArcGIS. To access the data, visit the SNODAS landing page.

Data set DOI: https://doi.org/10.7265/N5TB14TC

10 June 2019

NOAA@NSIDC and the University of Colorado (CU) Boulder Libraries are pleased to announce that the Glacier Photograph Collection (GPC) has recently been updated with over 8,000 new historical images, collected from 1883 through 2012. The GPC holds digital images of glaciers from around the world, most of which were digitized by scanning prints or glass negatives, but many that also originated in digital form. Some of the images date back to the mid-19th century and provide an historical reference for glacier extent. This update increases the size of the online, digital collection by 35%, bringing the total to approximately 25,000 glacier images.

The new GPC images were created by scanning selections from a large analog collection of photographic prints that had not been scanned in earlier work. The analog collection, previously held by NSIDC, now resides in CU Boulder Libraries’ archive. Research was conducted to find and assign... more

19 February 2019

NOAA@NSIDC is pleased to announce that the Arctic Submarine Lab (ASL) has corrected and reprocessed the sea ice draft data for the 2011 USS Connecticut and USS New Hampshire SCICEX campaigns and the 2014 USS New Mexico SCICEX campaigns. When the data were first released in 2015, the upward looking sonar data received from the submarine were the peak returns instead of the first returns of the signal. This can cause the sea ice draft data to be biased towards thinner ice. ASL has been able to retrieve the first return signals and feels confident that these data are now an accurate portrayal of the sea ice draft data. Note that the 2014 USS Hampton campaigns are still under review and will be released as time allows. The data can be accessed from the SCICEX Data Inventory and Access web page under the Sea Ice Draft Data tab. Documentation on the processing of these data can be found in the document... more

11 October 2018

NOAA@NSIDC has updated their September and March Sea Ice Index sea ice animations in Google Earth with 2018 near-real-time data and replaced the 2016 and 2017 near-real-time images with final data. To access the Google Earth files, see the NSIDC Data on Google Earth page.

4 October 2018

NOAA@NSIDC is pleased to announce that the NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration data product has been processed through 31 December 2017. The input data to the Goddard Bootstrap (BT) variables have been versioned up from v3.0 to v3.1 for 2017 data onward. This change does not affect the sea ice concentration CDR data variables. The specific changes are as follows:

Beginning with January 2017 data, the Sea Ice Concentration CDR uses version 3.1 of the Bootstrap Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS data set (NSIDC-0079) as input to the following NetCDF variables: goddard_bt_seaice_conc, goddard_bt_seaice_conc_monthly, goddard_merged_seaice_conc, and goddard_merged_seaice_conc_monthly. All data prior to January 2017 use version 3.0 of the NSIDC-0079 data set.

Version 3.1 of the NSIDC-0079 ice concentrations computes sea ice concentration with an open water... more

28 August 2018

The Submarine Arctic Science Program (SCICEX) is pleased to announce the re-release of sea ice draft data from the 2011 USS Connecticut and USS New Hampshire SCICEX campaign. These data were previously released in 2014 but were found to contain errors. The data have been reprocessed and are now available to users. In addition, the 2014 sea ice draft data from the USS New Mexico cruise have also been released. The 2014 sea ice draft data from the USS Hampton cruise are still pending and will be released when processing is complete. These data were acquired with upward looking sonar on US Navy submarines traveling under the Arctic Ocean in March and April of 2011 and 2014, respectively.

The SCICEX program is also pleased to announce the release of bathymetry data for the 2016 campaign from the USS Hampton cruise. The data from the USS Hartford 2016 cruise are pending and will be released when processing is complete. These data were acquired with downward looking sonar on US... more

17 July 2018

NOAA@NSIDC is pleased to announce that the Sea Ice Index has been updated from near-real-time data to final data for the time period 01 January 2016 through 31 December 2017. Initially, when the Sea Ice Index is first processed, it uses a near-real-time (NRT) sea ice concentration product as it input. This NRT product can contain missing data and has less quality control procedures applied to it than the final sea ice concentration input product provided by NASA Goddard. However, the final input product often lags behind the present by approximately a year. Using the NRT product allows the Sea Ice Index to provide sea ice extent and concentration data for the previous day. When the final NASA Goddard sea ice concentration product becomes available, NOAA@NSIDC reprocesses the data for that time period so that the more tightly quality controlled and gap filled input data are used for the Sea Ice Index computations. To access the newest data, please visit the... more