NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC)

Isolated portions of ICESat-2 Release 7 data are affected by gaps in instrument pointing estimates and degraded orbit/pointing solutions around spacecraft maneuvers. These issues can cause large errors in photon geolocation and heights. Please refer to the “Rel007 Pointing Data Gaps” sheet in the ICESat-2 Technical References Table, Version 4 for a list of impacted dates/times, and use caution when using these data. These issues are being addressed and updated data products will replace the degraded files.

Access to the Near-Real-Time AMSR2 EASE-Grid Daily Global Ice Concentration and Snow Extent, Version 1 data set in the legacy, on-premises archive at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) will be retired on 28 October 2025. The NASA Earthdata Cloud is now the primary data archive for the data.

High Mountain Asia Supraglacial Lake Extents on Debris Covered Glaciers, 1988-2023, Version 1 is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set identifies the extent of supraglacial lakes (SGLs) from 1988 through 2023 on 769 of the largest debris-covered glaciers in the High Mountain Asia region.

The AMSR2 Daily Polar Gridded Sea Ice Concentrations and AMSR2 Daily Polar Gridded Brightness Temperatures data sets, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been updated to Version 2. This update includes a format change from binary to NetCDF, resolves the previous pole hole mask issue, and adds the 37H channel.

The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) will add 4 IceBridge data sets to NASA Earthdata Cloud on 14 August 2025, completing the migration of all IceBridge collections to the cloud platform. Earthdata Cloud is NASA’s archive of Earth observations, hosted in Amazon Web Services (AWS). While these data sets will continue to be available via their current URLs and workflows, these legacy access methods will be retired soon.

The AMSR-E/AMSR2 Unified L2B Half-Orbit 25 km EASE-Grid Surface Soil Moisture, Version 1 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated. This update includes the addition of the AMSR-E derived data, with temporal coverage of the data set now spanning June 2002 - present (with a gap in data from October 2011 - July 2012, between the end of the AMSR-E mission and the beginning of AMSR2).

ICESat-2 and CryoSat-2 L4 Monthly Arctic Snow Depth and Sea Ice Thickness, Version 1 is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains monthly estimates of Arctic sea ice, snow depth, and ice thickness using combined ICESat-2 and CryoSat-2 freeboard measurements.

Data set DOI: https://doi.org/10.5067/04YYIKXW0GJS

IceBridge UAF L2 HF Bed Elevation and Ice Thickness, Version 1 and IceBridge ARES L2 Bed Elevation and Ice Thickness, Version 1 are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). These data sets contain glacier surface elevation, bed elevation, and ice thickness measurements for Alaska and Northwestern Canada.

Access to ICESat/GLAS data sets in the legacy, on-premises archive at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) will be retired on 11 September 2025. The NASA Earthdata Cloud is now the primary data archive for ICESat/GLAS data. If you currently access data through the legacy, on-premises archive, including through the HTTPS File System or Earthdata Search Stage for Delivery (ECHO Orders), please update your data access workflows and scripts to use the Earthdata Cloud archive.

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 11 August 2025.

Access to IceBridge data sets and data sets related to ICESat-2, ICESat/GLAS and IceBridge in the legacy, on-premises archive at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) will be retired on 11 September 2025. The NASA Earthdata Cloud is now the primary data archive for these data.

The Near Real-time SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 105, and the Near Real-time SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture, Version 107, are now available in the NASA Earthdata Cloud from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). Earthdata Cloud, NASA’s archive of Earth observations, is hosted in Amazon Web Services (AWS).

The Near-Real-Time AMSR2 EASE-Grid Daily Global Ice Concentration and Snow Extent, Version 1, (NISE_A2) is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). NISE_A2 is intended to be the replacement data set for Near-Real-Time SSM/I-SSMIS EASE-Grid Daily Global Ice Concentration and Snow Extent, Version 5 (NISE). This data set contains the same fields as the NISE product, with AMSR2 input data replacing SSMIS.

The SnowEx23 Mar23 IOP Snow Depth Profiles, Version 1 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). The data set contains snow depth profiles measured as part of the NASA SnowEx 2023 March 2023 Intensive Observation Period. Ground-based snow depth profile measurements were taken in the vicinity of 170 snow pits distributed across five study areas in Northern Alaska. Temporal coverage spans from 07 March to 16 March 2023.

Access to SMAP data sets in the legacy, on-premises archive at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) will be retired on 28 October 2025. The NASA Earthdata Cloud is now the primary data archive for SMAP data. If you currently access data through the legacy, on-premises archive, including through the HTTPS File System, Earthdata Search Stage for Delivery (ECHO Orders), or Customize (ESI) in Earthdata Search or the EGI API, please update your data access workflows and scripts to use the Earthdata Cloud archive.

The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) learned that the U.S. Department of Defense (DoD) will continue processing and delivery of data from the Special Sensor Microwave Imager/Sounder (SSMIS) instrument through the retirement of the DMSP mission, which is expected in September 2026. For further details, see the Earthdata: Status Update on DMSP Data Products.

Versions 7 of ATLAS/ICESat-2 L1B Converted Telemetry Data (ATL02) and ATLAS/ICESat-2 L2A Global Geolocated Photon Data (ATL03) are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). ATL03 contains height above the WGS 84 ellipsoid, latitude, longitude, and time for each photon downlinked by the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board ICESat-2.

Version 4 data sets of AMSR-E/Aqua Daily L3 6.25 km 89 GHz Brightness Temperature Polar Grids, AMSR-E/Aqua Daily L3 12.5 km Brightness Temperature, Sea Ice Concentration, & Snow Depth Polar Grids, and AMSR-E/Aqua Daily L3 25 km Brightness Temperature & Sea Ice Concentration Polar Grids are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

The Near Real-Time MODIS/Terra L3 Global Daily 500m SIN Grid Snow Cover, Grain Size, and Dust Radiative Forcing, Version 1 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated. Spatial coverage has been expanded to include 6 new tiles over the Andes mountains in Chile, South America.

The VIIRS/NPP Snow Cover Daily L3 Global 375m CMG, Version 2 and VIIRS/JPSS1 Snow Cover Daily L3 Global 375m CMG, Version 2 data sets are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). These data sets provide a daily global view of cloud-gap-filled  snow cover at 375 m resolution.