NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC)
Data Updates
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 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).
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
ATLAS/ICESat-2 ATL02 Linear Impulse Response, Version 1 is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This ancillary ICESat-2 data set contains the linear impulse response in units of time-of-flight, which was measured over the Salar de Uyuni using ATL02 photon data.
Access to the Glacial and Fast Ice Distributions in Southeast Greenland Fjords, Version 1 data set (NSIDC-0796) in the legacy, on-premises archive at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been retired. The NASA Earthdata Cloud is now the primary data archive for ICESat-2 data.
Access to ICESat-2 Derived Canopy Height Model, Version 1 data set (IS2CHM) in the legacy, on-premises archive at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been retired. The NASA Earthdata Cloud is now the primary data archive for ICESat-2 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, data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), in the NASA
The Quicklook Arctic Weekly EASE-Grid Sea Ice Age, Version 1, and Quicklook Arctic Weekly EASE-Grid Sea Ice Motion Vectors, Version 1 data sets, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been updated with data from 1 January 2025 through 2 December 2025.
The Polar Pathfinder Daily 25 km EASE-Grid Sea Ice Motion Vector Version 4 and EASE-Grid Sea Ice Age Version 4 data sets, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been updated through 2024. The Polar Pathfinder Daily 25 km EASE-Grid Sea Ice Motion Vector data set contains daily and weekly sea ice motion vectors, as well as browse images representing the weekly data.
The Snow Melt Onset Over Arctic Sea Ice from SMMR and SSM/I-SSMIS Brightness Temperatures, Version 5 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated to include data through 2025. Data files are now available in yearly NetCDF files, replacing the single multi-year NetCDF data file.
The ATLAS/ICESat-2 L3B Monthly Gridded Dynamic Ocean Topography, Version 4, and ATLAS/ICESat-2 L3B Monthly 3-Month Gridded Dynamic Ocean Topography, Version 2 data sets, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), require reprocessing.
High Mountain Asia Daily Reach-Scale River Discharge using Data Assimilation, 2004-2019, Version 1 is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set reports daily, reach-scale river discharge for 114,147 river reaches in the High Mountain Asia region from 1 January 2004 through 31 December 2019.
ATLAS/ICESat-2 L3B Gridded Antarctic and Arctic Land Ice Height, Version 5 (ATL14), and ATLAS/ICESat-2 L3B Gridded Antarctic and Arctic Land Ice Height Change, Version 5 (ATL15) are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).
Access to the Glacial and Fast Ice Distributions in Southeast Greenland Fjords, Version 1 data set (NSIDC-0796) 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 this data.
Access to ICESat-2 Derived Canopy Height Model, Version 1 data set (IS2CHM) 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 this data.
Version 6 of both ATLAS/ICESat-2 L1B Converted Telemetry Data and ATLAS/ICESat-2 L2A Global Geolocated Photon Data will be retired from the NSIDC DAAC on 2 February 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.
The SnowEx23 Soil Moisture Sensor Measurements, 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 soil sensor measurements collected as part of the SnowEx Alaska 2023 field campaign. Time series measurements occurred at two locations within the Bonanza Creek Experimental Forest, Alaska.
The IceBridge LVIS L1A Geotagged Images, Version 1, data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has had additional data added from the Antarctica 2009, 2010, 2011 and Greenland 2010, 2011, 2012, 2013 campaigns. This dataset contains geotagged images paired with the Land, Vegetation, and Ice Sensor (LVIS), an airborne lidar scanning laser altimeter.
The Near-Real-Time AMSR2 EASE-Grid Daily Global Ice Concentration and Snow Extent, Version 1 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), was missing data for the sea ice parameter from 1 October 2025 through 7 November 2025. The missing data have now been backfilled and are available for download.