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

Data transformation services through NASA Earthdata Harmony are now available for L2-L4 Soil Moisture Active Passive (SMAP) data sets archived at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). Earthdata Harmony allows users to subset and transform NASA ESDIS data available in Earthdata Cloud. Users can access Earthdata Harmony through the NASA Earthdata Search interface or programmatically via Harmony’s API or harmony-py Python library.

The SnowEx Mores Creek Summit (MCS) Airborne LiDAR Survey, Version 1 and SnowEx Mores Creek Summit (MCS) Airborne LiDAR Survey Raw, Version 1 data sets, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been updated. Data files from 13 Jan 2025 through  01 May 2025 have been added to both data sets.  Additionally, corrupted GeoTIFF files were replaced for 8 December 2022 and 9 February 2023.

Access to Passive Microwave 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 15 January 2026. The NASA Earthdata Cloud is now the primary data archive for Passive Microwave data.

The AMSR-E/AMSR2 Unified L3 Global Daily 25 km EASE-Grid Snow Water Equivalent, Version 1, the AMSR-E/AMSR2 Unified L3 Global 5-Day 25 km EASE-Grid Snow Water Equivalent, Version 1, and the AMSR-E/AMSR2 Unified L3 Global Monthly 25 km EASE-Grid Snow Water Equivalent, Version 1 data sets, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been updated.

Versions 7 of ATLAS/ICESat-2 L3A Sea Ice Height (ATL07), ATLAS/ICESat-2 L3A Sea Ice Freeboard (ATL10), and ATLAS/ICESat-2 L3A Ocean Surface Height (ATL12) are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

The ATLAS/ICESat-2 expedited latency “Quick Look” data sets for ATL07 and ATL10, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) have been experiencing a data outage since 30 September, 2025. Due to the lapse in federal government funding, there is a disruption to SSMIS (DMSP) data, which is an input to these data sets. There is no current estimate for when normal operations will resume. We apologize for any inconvenience.

The SnowEx23 Corner Reflector Location and Orientation, Version 1 data set available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been updated. Twenty new photos have been added to the Bonanza Creek Experimental Forest study area collection. 

Data set DOI:  https://doi.org/10.5067/KGQ0NHESWLKE

The Calibrated Enhanced-Resolution Passive Microwave Daily EASE-Grid 2.0 Brightness Temperature ESDR, Version 2 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated to include SSMIS data from 2005 to the present, and continues to be updated daily. This data product is gridded to three EASE-Grid 2.0 projections (North Azimuthal, South Azimuthal, and Cylindrical) and includes enhanced-resolution imagery, as well as coarse-resolution, averaged imagery.

The SnowEx23 Mar23 IOP CSU 1 GHz Ground Penetrating Radar, 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 the results of 1 GHz ground-penetrating radar surveys conducted as part of the NASA SnowEx23 field campaign in Alaska, USA. Parameters in this data set include: two-way travel time, snow density, calculated snow depth, and calculated snow water equivalent.

Access to the Calibrated Enhanced-Resolution Passive Microwave Daily EASE-Grid 2.0 Brightness Temperature ESDR (NSIDC-0630), Version 2 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 11 November 2025. The NASA Earthdata Cloud is now the primary data archive for NSIDC-0630 V2 data.

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 April 2025. This data set provides daily gridded brightness temperatures derived from passive microwave sensors and distributed in a polar stereographic projection.

The MEaSUREs Greenland Image Mosaics from Sentinel-1A and -1B, 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 have been added, and the temporal coverage now spans from 01 January 2015 to 25 April 2025. This data set is part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program.

The  SnowEx23 GIS References and Field Maps, 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 contains geolocation information for ground-based and airborne measurements collected in Alaska, USA as part of the NASA SnowEx 2023 campaign. Temporal coverage spans from 25 October 2021 to 30 November 2023.

Versions 7 of ATLAS/ICESat-2 L2A Normalized Relative Backscatter Profiles (ATL04), ATLAS/ICESat-2 L3A Land Ice Height (ATL06), ATLAS/ICESat-2 L3A Land and Vegetation Height (ATL08), ATLAS/ICESat-2 L3A Calibrated Backscatter Profiles and Atmospheric Layer Characteristics (ATL09), and ATLAS/ICESat-2 L3A Along Track Inland Surface W

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.

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.

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.

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.