Data Announcements

News and tips for data users
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Previous versions of multiple ATLAS/ICESat-2 along-track data sets will be retired from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) on 26 February 2024. After this date, access to the data will no longer be available.  Data set documentation will remain accessible for future reference. We recommend using the latest versions of these data sets, which have been available since August 2023.
The Daily Lake Ice Phenology Time Series Derived from AMSR-E and AMSR2, Version 1 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated. New data has been added from 01 Jan 2016 to 31 December 2022. This dataset provides 5 km ice phenology retrievals that describe the daily lake ice conditions (ice-on/ice-off) over the Northern Hemisphere.
The Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data, Version 2 data set, available from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated through  30 September 2023. This data set is generated from brightness temperature data and is designed to provide a consistent time series of sea ice concentrations spanning the coverage of several passive microwave instruments.
NOAA@NSIDC is pleased to announce that the Climate Data Record of Passive Microwave Sea Ice Concentration, Version 4 data set, accessible through the National Snow and Ice Data Center (NSIDC), has been updated to include the time period of 01 July 2023 through 30 September 2023. This data set provides a consistent daily and monthly time series of sea ice concentrations beginning 25 October 1978 for both the north and south polar regions on a 25 km x 25 km grid.
Version 5 of multiple ATLAS/ICESat-2 along-track data sets will be retired from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) on 12 February 2024.
The MEaSUREs Greenland Quarterly Ice Sheet Velocity Mosaics from SAR and Landsat, Version 5 and MEaSUREs Greenland Monthly Ice Sheet Velocity Mosaics from SAR and Landsat, Version 5 data sets, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been updated. New data has been added, and both datasets now span from 01 December 2014 to 31 August 2023.
The MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR, Version 4 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated. New data from 21 January 2022 to 20 September 2023 have been added. 
The MEaSUREs Greenland Image Mosaics from Sentinel-1A and -1B, Version 4 and MEaSUREs Greenland 6 and 12 day Ice Sheet Velocity Mosaics from SAR, Version 2 data sets, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been updated. The temporal coverage for the image mosaics has been extended until 27 October 2023, and the 6 and 12 day velocity mosaics now spans until 15 October 2023.
Version 3 of ICESat-2 L4 Monthly Gridded Sea Ice Thickness data is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set reports monthly, gridded winter sea ice thickness across the Arctic Ocean.
MEaSUREs Greenland Annual Ice Sheet Velocity Mosaics from SAR and Landsat, Version 5 data set is now available through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program, contains annual ice velocity mosaics for the Greenland Ice Sheet posted at a 200 m resolution.
The Near Real-time SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 105 and Near Real-time SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture, Version 107 data sets, ac
The High Mountain Asia Daily 5 km Downscaled SPEAR Precipitation and Air Temperature Projections, Version 1 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This dataset consists of daily, 5 km resolution projections of precipitation and mean near-surface air temperature for the High Mountain Asia (HMA) region.
New versions of the following SMAP Level-1, Level-2, and Level-3 Data Sets are available from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). Noteworthy changes to the L1 data include a new land/water mask and algorithm modifications to reduce radio frequency interference. The L2 and L3 products are updated on the basis of this new source data. More detailed descriptions of the changes are available in the data set documentation. Note that coverage is currently available from 04 Dec 2023 onward.
The LVIS Classic L1B Geolocated Return Energy Waveforms, LVIS Classic L2 Geolocated Surface Elevation and Canopy Height Product, and LVIS L1A Geotagged Images Version 1 data sets, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been updated to include data from the 2023 Gabon campaign.
The Bootstrap Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS, Version 4 data set is now available from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). With Version 4, the data are now provided in NetCDF format, and temporal coverage is extended to March 31, 2023. Links to scripts that convert the NetCDF back to the original binary format are available in the data set documentation. The Version 3 data in binary format will remain available until May 2024.
The High Mountain Asia Daily 0.05 x 0.05 deg Noah-MP Land Surface Model Reanalysis, Version 1 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set provides a water budget reanalysis for the High Mountain Asia (HMA) region from 2003 to 2020.
The Near Real-time SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 105 and Near Real-time SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture, Version 107 data sets, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been experiencing a data outage since 2023-11-26.
The Pre-IceBridge LVIS L0 Raw Ranges, Version 1 data set, will be retired from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) on 30 November 2023. After this date, access to the data will no longer be available, but the data set documentation will remain available for future reference.   Access to the documentation is provided on the data set web page at the NSIDC DAAC: https://nsidc.org/data/blvis0/versions/1
Version 5 of multiple ATLAS/ICESat-2 along-track data sets will be retired from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) on 19 December 2023.
The DMSP SSM/I-SSMIS Daily Polar Gridded Brightness Temperatures, Version 6 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated through 5 October 2023. This data set provides daily gridded brightness temperatures derived from passive microwave sensors and distributed in a polar stereographic projection.