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

Enabling researchers and data users to better understand how changes in the cryosphere impact our planet.

Data Updates

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Version 2 of IceBridge LVIS L1B Geolocated Return Energy Waveforms, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated to include data from 14 April 2009 to 10 May 2012. This data set contains return energy waveform data measured over Greenland, Alaska, and Antarctica by the NASA Land, Vegetation, and Ice Sensor (LVIS), an airborne lidar scanning laser altimeter. Temporal coverage now spans 14 April 2009 to 20 September 2017.

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 been expanded with the addition of over 100,000 images from the 2015 southern hemisphere campaign. This data set contains geotagged images taken over Greenland and Antarctica by the NASA Digital Mapping Camera paired with the Land, Vegetation, and Ice Sensor (LVIS), an airborne lidar scanning laser altimeter.

The ATLAS/ICESat-2 L3B Monthly Gridded Dynamic Ocean Topography (ATL19) and ATLAS/ICESat-2 L3B Mean Inland Surface Water Data (ATL22), Version 2 data sets will be retired from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) on 12 March 2024. After this date, access to the data will no longer be available.  Data set documentation will remain accessible for future reference.

The SnowEx23 Bonanza Creek Experimental Forest Terrestrial Lidar Scans, Version 1 and SnowEx23 Bonanza Creek Experimental Forest Terrestrial Lidar Scans Raw, Version 1 data sets are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). These data sets contain digital terrain models (DTMs) derived from terrestrial lidar scans (TLS) collected as part of the SnowEx 2023 campaign and the unprocessed poi

ICESat-2 Derived 30 m Along-Track Boreal Aboveground Biomass Density, Version 01 is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).  This data set provides a quality-filtered set of ATLAS/ICESat-2 L3A Land and Vegetation Height (ATL08), Version 5 observations of relative canopy heights and aboveground biomass density model results for circumpolar boreal forests.  The data were collected at 30 m along-track segment lengths during the 2019–2021 high

The SnowEx Colorado 3M Snow Depth Time Series and DEMs from High-Resolution Satellite Image Pairs, 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 a time series of snow depth maps and related intermediary snow-on and snow-off DEMs for Grand Mesa, Colorado derived from very-high-resolution (VHR) satellite stereo images and lidar point cloud data.

The Automated Greenland Glacier Termini Position Time Series, 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 shapefiles of termini traces from 294 Greenland glaciers, derived using a deep learning algorithm applied to satellite imagery.  Also available are supplementary data, including temporal coverage of termini traces, time series data of termini variations, and updated land, ocean, and ice masks deriv

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.

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 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.