Data Announcements
News and tips for data users
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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 2024. This data set provides daily gridded brightness temperatures derived from passive microwave sensors and distributed in a polar stereographic projection.
High Mountain Asia 12 km Modeled Estimates of Aerosol Transport, Chemistry, and Deposition Reanalysis, 2003-2019, Version 1 is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).
The Near Real-time SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, 105 and Near Real-time SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture, 107 data sets, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been experiencing a data outage since 18 June 2024 at approximately 10 am MT.
The following files from the High Mountain Asia Daily 5 km Downscaled SPEAR Precipitation and Air Temperature Projections, Version 1 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been replaced:
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 31 March 2024, and the 6 and 12 day velocity mosaics now spans until 19 March 2024.
The GLIMS Glacier Viewer now includes both versions 6.0 and 7.0 of the Randolph Glacier Inventory (RGI) outlines as layers.
The SnowEx23 Snow Water Equivalent, 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 snow depth, snow water equivalent, and bulk snow density data collected during the NASA SnowEx 2023 field campaign. Samples were collected using an Adirondack snow sampler from two study sites: Upper Kuparuk and Toolik, an arctic tundra environment in Northern Alaska, and Farmers Loop Creamers Field, a boreal
The SnowEx21 Time Series Snow Pits, 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 pit measurements obtained from sites distributed over four states (CO, ID, MT, UT) during the 2021 field campaign . Available measured parameters are: snow depth, snow temperature, snow density, stratigraphy, grain size, manual wetness, liquid water content , and snow water equivalent.
Beginning on May 11, 2024, MODIS/Terra began experiencing geolocation errors. This affected the geolocation accuracy of the Terra data between May 11 and 12 (DOY 132-133), 2024. Terra L2s and dailies for these two days, as well as the 8 and 16-days products from DOY 129 will be reprocessed in the coming days.
Beginning late on May 25, 2024, SNPP VIIRS began experiencing geolocation errors, in excess of 1 km. These errors persisted through May 26 and May 27, 2024, at which point forward production of all SNPP VIIRS data sets was halted until further notice. Users are discouraged from using any SNPP VIIRS data produced on or after May 25, 2024. For more details, please visit: https://ladsweb.modaps.eosdis.nasa.gov/alerts-and-issues/140010.
NSCAT Daily SIR-Enhanced EASE-Grid 2.0 Radar Backscatter, Version 1 and SASS Daily SIR-Enhanced EASE-Grid 2.0 Radar Backscatter, Version 1 are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). These data sets are newly processed radar backscatter products from the NASA Scatterometer (NSCAT) and Seasat-A Scatterometer (SASS) instruments with the Scatterometer Image Reconstruction (SIR) or Drop-in-the-Bucket gridding (GRD) applied.
The Visible Infrared Imaging Radiometer Suite (VIIRS) Version 1 (Collection 1) s
The Visible Infrared Imaging Radiometer Suite (VIIRS) Version 1 (Collection 1) snow and sea ice data sets will cease forward processing on June 17, 2024. Although Version 1 data will remain available for download for several months, NSIDC strongly encourages users to transition to VIIRS Version 2 (Collection 2) prior to the 17th.
The IceBridge ARES L1B Geolocated Radar Echo Strength Profiles, Version 1, and IceBridge UAF L1B HF Geolocated Radar Echo Strength Profiles, Version 1 data sets, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been updated. Previously unavailable files have been added as a result of processing efforts by the Data Authors.
The GLIMS Glacier Database, Version 1 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated. This update includes new outlines for several glaciers in Alaska, Washington, Greenland, and New Zealand. Additionally, a number of glaciers in Washington and Wyoming are now classified as extinct.
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), have been updated so entire data sets for Version 6 are now referenced to ITRF2014.
The SMAP Level 4 data sets, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), were reprocessed from 1 Nov 2023 through the present after an issue was discovered with the IMERG-Late precipitation input after the GPM orbit boost on 7-8 November 2023. The reprocessed data files have the SVID (science version ID) Vv7031 (the L4 SM products) and Vv7041 (the L4 carbon product) and now use the NOAA Climate Prediction Center "Unified" (CPCU) precipitation inputs instead of IMERG-Late precipitation inputs.
The MODIS/Terra Global Annual 0.01Deg CMG Snow Cover Climatology (NSIDC-0791), Version 1 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated from a Basic to a Standard Level of Service, which means more documentation and support options are now available. Please see our Level of Service article article for more information.
The Near Real-Time MODIS/Terra L3 Global Daily 500m SIN Grid Snow Cover, Grain Size, and Dust Radiative Forcing, 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 represents an updated version of the MODIS Snow Covered Area and Grain-size (MODSCAG) and MODIS Dust Radiative Forcing in Snow (MODDRF) data sets previously produced by the NASA Jet Propulsion Laboratory (JPL). Parameters include snow fracti
ICESat-2 Derived Sea Ice Melt Pond Characteristics from the Density-Dimension Algorithm, Version 3, is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data provides locations and depths of melt ponds in the Multi-Year Arctic Sea Ice Region (MYASIR), calculated from ATLAS/ICESat-2 L2A Global Geolocated Photon Data (ATL03), Version 5 using an autoadaptive algorithm. The temporal range is 4 June 2020 to 28 August 2020.