Data Announcements

L1B SMAP Reflectometry, Version 1 is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This product represents the first full polarimetric Global Navigation Satellite System Reflectometry (GNSS-R) dataset, derived from the Soil Moisture Active Passive (SMAP) mission radar. The main parameters are the normalized Stokes parameters, total power normalized bistatic radar cross-section, and reflectivity.

The Daily 4 km Gridded SWE and Snow Depth from Assimilated In-Situ and Modeled Data over the Conterminous US, Version 1 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated. The temporal coverage has been extended to 30 September 2023 by adding the latest water year.Data set DOI: https://doi.org/10.5067/0GGPB220EX6A

The distribution of ATLAS/ICESat-2 expedited latency “Quick Look” data sets for ATL07 and ATL10, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), is delayed beyond the nominal 3-day latency. The delay is caused by a delay of input data for the Near-Real-Time NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 2 dataset which serves as input to ATL07 and ATL10. NSIDC and the data providers are investigating the issue and actively working on resuming timely delivery.

The ICESat-2 L4 Monthly Gridded Sea Ice Thickness, Version 3 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated. The temporal coverage has been extended by adding the monthly files from September 2023 through April 2024.Data set DOI: https://doi.org/10.5067/ZCSU8Y5U1BQW

The Near Real-Time MODIS/Terra L3 Global Daily 500m SIN Grid Snow Cover, Grain Size, and Dust Radiative Forcing, Version 1 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated. The temporal coverage has been extended to include files from 1 April 2024 through 30 June 2024. Data set DOI:  https://doi.org/10.5067/HNVFRD5ICZN1

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  31 March 2024. 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.

The MEaSUREs Greenland Annual Ice Sheet Velocity Mosaics from SAR and Landsat, Version 5, the MEaSUREs Greenland Quarterly Ice Sheet Velocity Mosaics from SAR and Landsat, Version 5, and the 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.

The SnowEx17 GPR and Lidar-Derived Snowpack Relative Permittivities and Densities, 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 1 GHz ground-penetrating radar surveys (GPR) conducted in Grand Mesa, Colorado, USA.  Data include two-way travel time, lidar-measured snow depth, calculated snow water equivalent, calculated snow density, and calculated relative permittivity.

The Glacial and Fast Ice Distributions in Southeast Greenland Fjords, Version 1 dataset is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set provides spatial distributions of fast ice and glacial ice in eight fjords spanning the Southeast Greenland coast: Nansen, Kangerlusruaq, Ikertivaq, Skjoldungen, Tingmiarmiut, Napasorsvaq, Anoritup, and Kangerlluluk. Included in the dataset are all the fjord data along the Southeast Greenland coast.

The SnowEx23 CRREL Ground Penetrating Radar, Version 1 and SnowEx23 CRREL Ground Penetrating Radar 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 the results of 1 GHz ground-penetrating radar surveys conducted in Alaska, USA and the corresponding raw data.

The SnowEx20 Grand Mesa IOP Lidar and GPR-Derived Snow Water Equivalent and Snow Density, 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.

The SnowEx23 University of Wyoming Ground Penetrating Radar, 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 for more information.

MEaSUREs ITS_LIVE Antarctic Annual 240 m Ice Sheet Extent Masks, 1997-2021, Version 1 is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This ITS_LIVE data set, part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, consists of 240 m Antarctic Ice Sheet extent masks at roughly annual resolution from 1997 through 2021.

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 2023, extending the temporal coverage through 29 December 2023.

MEaSUREs ITS_LIVE Greenland Monthly 120 m Ice Sheet Extent Masks, 1972-2022, Version 1 is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains a monthly, 120 m resolution ice mask for the Greenland Ice Sheet from 1972 to 2022. The presence of ice was determined from 237,556 manually and AI-derived terminus positions acquired by satellite optical and radar observations.

MEaSUREs ITS_LIVE Antarctic Quarterly 1920 m Ice Shelf Height Change and Basal Melt Rates, 1992-2017, Version 1 is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains quarterly, 1920 m resolution estimates of Antarctic ice shelf surface height change, basal melt rate, thickness, surface mass balance, firn air content, and associated errors, from 17 March 1992 through 16 December 2017.

High Mountain Asia 1 km MODIS-AIRS Gap-Filled Ground Temperatures and Permafrost Probability Maps, 2003-2016, Version 1 is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set consists of 1 km resolution monthly land surface temperatures (MLSTs); mean annual ground temperatures (MAGTs); and estimates of permafrost extent (PE) in the High Mountain Asia region from 1 Jan 2003 – 31 Dec 2016.

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 30 May 2024, and the 6 and 12 day velocity mosaics now spans until 24 April 2024.

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

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 January 2024 through 31 March 2024. 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.