Data Announcements

The Bootstrap Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS, Version 4 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated to include new data through 31 August 2025. This data set consists of daily and monthly sea ice concentrations derived from brightness temperature measurements. This dataset is available for the north and south polar regions, with temporal coverage extending back to 1 November 1978.

The MEaSUREs Greenland Ice Mapping Project (GIMP) Land Ice and Ocean Classification Mask, Version 1 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated. Temporal coverage has been expanded, with land ice and ocean masks added for the year 2020. The data set now provides land ice and ocean masks for the years 2000, 2015, and 2020.

VIIRS/JPSS1 Snow Cover Daily L3 Global 375m SIN Grid, Version 2 and VIIRS/NPP Snow Cover Daily L3 Global 375m SIN Grid, Version 2 data sets, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) are now available on the Application for Extracting and Exploring Analysis Ready Samples (AppEEARS). AppEEARS offers a simple and efficient way to access and transform geospatial data from a variety of federal data archives.

The Daily Global Land Parameters Derived from AMSR-E and AMSR2, Version 3 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, with the temporal range for this dataset now spanning 19 June 2002 to 31 December 2023.

The TRMM PR SIR-Enhanced EASE-Grid 2.0 Surface Radar Backscatter, Version 1 (NSIDC-0807), and ERS SIR-Enhanced EASE-Grid 2.0 Radar Backscatter, Version 1 (NSIDC-0808), are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

The MEaSUREs Antarctic Grounding Line from Differential Satellite Radar Interferometry, Version 2 (NSIDC-0498), and the MEaSUREs Grounding Zone of the Antarctic Ice Sheet, Version 1 (NSIDC-0778) data sets, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been updated to versions 2.1 and 1.1, respectively.

The MEaSUREs Greenland Ice Velocity: Selected Glacier Site Single-Pair Velocity Maps from Optical Images, 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 for the year 2024, extending the temporal coverage through 31 December 2024.

The SnowEx23 Airborne Orthoimagery, Version 1 (SNEX23_Photo) and SnowEx23 Mar23 IOP Computed Tomography Snow Microstructure, Version 1 (SNEX23_MAR23_CTSM) data sets are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). The SNEX23_Photo data set contains aerial photogrammetry images collected from both a boreal forest environment in the Fairbanks region of central Alaska and a coastal tundra environment i

The SnowEx23 Airborne Orthoimagery, Version 1 (SNEX23_Photo) and SnowEx23 Mar23 IOP Computed Tomography Snow Microstructure, Version 1 (SNEX23_MAR23_CTSM) data sets are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). The SNEX23_Photo data set contains aerial photogrammetry images collected from both a boreal forest environment in the Fairbanks region of central Alaska and a coastal tundra environment i

Version 6 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) will be retired from the NSIDC DAAC on 7 April 2026. Upon retirement, data will no longer be accessible, but all related documentation will remain available on the data set web page for future reference.

ICESat/ICESat-2 Traverse: Monthly GPS Surface Elevation Data at Summit Station, Greenland, 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 Global Positioning System (GPS) surface elevation (antenna) and position data gathered along a defined survey transect to the west of Summit Station, Greenland starting in August 2006.

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 January 2026. This data set provides daily gridded brightness temperatures derived from passive microwave sensors and distributed in a polar stereographic projection.

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 all Scanning Multichannel Microwave Radiometer (SMMR) data (1978-1987), all Special Sensor Microwave/Imager (SSM/I) data (1987-2009), and all Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) data (2002-2011).

The Reynolds Mountain East FMCW Radar Autopicked Snow Depths, Version 1 (RME_FMCW_SD) and SnowEx21 Boise River Basin Ground-penetrating Radar Two-way Travel Time, Version 1 (SNEX21_BR_GPR) data sets are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). The RME_FMCW_SD data set contains semi-automatically picked snow depths from FMCW radar transects in Reynold's Mountain East, in the Reynold's C

Version 2 of Visible Infrared Imaging Radiometer Suite (VIIRS) JPSS-2  data sets are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). These data sets include snow cover, sea ice cover, and sea ice temperature data collected by the Visible Infrared Imaging Radiometer Suite (VIIRS) sensor from the JPSS-2 (NOAA-21) satellite, launched on November 1, 2022. Temporal coverage extends from 10 February 2023 to present.

Weekly Snow Stake Array Measurements, Summit Station, Greenland, Version 1 is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set provides weekly snow stake height measurements at Summit Station, Greenland, near the ice divide. The array comprises 121 snow stakes and aids in understanding snowfall processes and contextualizes snow accumulation, which is a major component of the region’s surface mass balance.

The MEaSUREs Polar EASE-Grid 2.0 Daily 6 km Land Freeze/Thaw Status from AMSR-E and AMSR2, Version 2 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated. The temporal coverage for this data set now spans 2 June 2002 to 31 December 2023.

Version 4 of MEaSUREs BedMachine Antarctica is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains a bed topography and bathymetry map of Antarctica deduced by subtracting the ice thickness from the surface elevation taken from the Reference Elevation Model of Antarctica (REMA). This version of the dataset includes new bathymetry data and ice thickness estimate inputs. Additionally, a new glacier mask has been added.

The SnowEx23 Apr23 Snow Surface Reflectance and Albedo, Version 1 (SNEX23_Albedo) and SnowEx23 Oct22 IOP Snow Pits and Substrate Conditions at Freeze Up, Version 1 (SNEX23_Oct22_SP) data sets are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). The SNEX23_Albedo data set contains a comprehensive set of field-based measurements of snow surface reflectance and broadband snow albedo collected during the NA

The SMAPVEX19-22 Massachusetts Field Measured Forest Tree Inventory, Biophysical Data, Leaf Area Index, and Estimated Biomass, Version 1, and SMAPVEX19-22 Millbrook Field Measured Forest Tree Inventory, Biophysical Data, Leaf Area Index, and Estimated Biomass, Version 1, are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).