Data Announcements

The SnowEx20-21 Cameron Pass Derived Snowpack Relative Permittivities and Densities from 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). This data set contains the results of ground-penetrating radar surveys conducted at Cameron Pass, Colorado during the SnowEx20 campaign.

The SnowEx23 Airborne Lidar-Derived 0.25M Snow Depth and Canopy Height, Version 1 and SnowEx23 Airborne 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 provide digital terrain models, snow depth, and canopy height, acquired by a scanning lidar system and derived from Point Cloud Digital Terrain Models from two regions of A

The ATLAS/ICESat-2 L2A Global Geolocated Photon Data (ATL03), Version 6 data set, the ATLAS/ICESat-2 L2A Normalized Relative Backscatter Profiles (ATL04), Version 6 data set and the higher level products derived from ATL03 and ATL04, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), will be updated so the entire data set is referenced to ITRF2014.

NOAA@NSIDC is pleased to announce that the Climate Data Record of Passive Microwave Sea Ice Concentration, Version 4 data set, accessible through the National Snow and Ice Data Center (NSIDC), has been updated to include the time period of 01 October 2023 through 31 December 2023. This data set provides a consistent daily and monthly time series of sea ice concentrations beginning 25 October 1978 for both the north and south polar regions on a 25 km x 25 km grid.

Visible Infrared Imaging Radiometer Suite (VIIRS) Version 1 (Collection 1) snow and sea ice data sets will cease forward processing on June 17, 2024. The Version 1 data will remain available for download, but users are encouraged to transition to VIIRS Version 2. VIIRS Version 2 includes new snow, sea ice, and ice surface temperature data sets from both the NASA/NOAA Suomi National Polar-orbiting Partnership (Suomi NPP) satellite and the National Oceanic and Atmospheric Administration-20 (NOAA-20) satellite. 

The SnowEx23 Laser Snow Microstructure Specific Surface Area Snow-off Data, 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 vertical profiles of snow reflectance and specific surface area (SSA) from the Fairbanks region of central Alaska and the North Slope region of the northern Alaska coastal plain, collected as part of the NASA SnowEx 2023 field campaign.  Temporal coverage spans from 17 O

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 30 September 2023. This data set consists of daily and monthly sea ice concentrations derived from brightness temperature measurements. This data set is available for the north and south polar regions, with a temporal coverage extending back to 1 November 1978.

The ATLAS/ICESat-2 L3B Weekly Gridded Atmosphere (ATL16) and ATLAS/ICESat-2 L3B Monthly Gridded Atmosphere (ATL17), Version 4 data sets will be retired from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) on 4 April 2024. After this date, access to the data will no longer be available.  Data set documentation will remain accessible for future reference.

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 26 December 2023, and the 6 and 12 day velocity mosaics now spans until 14 December 2023.

High Mountain Asia Daily 5km Landslide Hazard Indicator, Version 1 is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set projects the daily hazard of rainfall-triggered landslides in the High Mountain Asia region from 2015 through 2100, at 5 km resolution. Projections are provided for two Shared Socioeconomic Pathways (SSPs)—SSP2-4.5 and SSP5‑8.5—based on temperature and precipitation projections from a 30-member ensemble climate model.

After some consideration, NOAA@NSIDC has decided to remove the beta release of the NOAA/NSIDC Climate Data Record of Passive Microwave 12.5 km Sea Ice Concentration, Version 5 data set from the public archive. This decision is due to inaccuracies and discontinuities in the older portion of the time series. We believe it is in the best interest of the user community that we resolve these issues first and then release a fully validated product. The Version 4 product will continue to be produced and is now listed as the most recent version.

The ASO L4 Lidar Snow Depth 3m UTM Grid, Version 1, ASO L4 Lidar Snow Depth 50m UTM Grid, Version 1, and ASO L4 Lidar Snow Water Equivalent 50m UTM Grid, Version 1 data sets, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been updated. Incorrectly geolocated Quality flag (QF) files for Grand Mesa, CO from February 2017 have been

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 Jan 2024. This data set provides daily gridded brightness temperatures derived from passive microwave sensors and distributed in a polar stereographic projection.

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.

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 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

NOAA@NSIDC is pleased to announce that the beta release of the NOAA/NSIDC Climate Data Record of Passive Microwave 12.5 km Sea Ice Concentration, Version 5 data set is now available at the National Snow and Ice Data Center (NSIDC). The sea ice concentration (SIC) climate data record (CDR) V5 data set provides a daily and monthly time series of sea ice concentrations beginning 25 October 1978 and continuing to the present for both the north and south polar regions. The data is provided on a 12.5 km x 12.5 km polar stereographic grid.

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.