Data Announcements

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.

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 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.

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.

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. 

The SnowEx23 Colorado State University Ground Penetrating Radar Raw, 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 raw results of 1 GHz ground-penetrating radar surveys conducted as part of the NASA SnowEx23 field campaign in Alaska, USA. Temporal range spans from 7 March 2023 to 16 March 2023. 

ICESat-2 Pre-Launch Simulated Multiple Altimeter Beam Experimental Lidar Advanced Topographic Laser Altimeter System (MATLAS) Data, Version 2 is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains simulations of the expected performance of the ICESat-2 ATLAS instrument produced from Multiple Altimeter Beam Experimental Lidar (MABEL) data. The data files each contain approximately 1 minute of HDF5-derived MABEL data from areas in North America and Greenland.

The SnowEx23 Mar23 Community IOP Snow Depth 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 snow depth measurements from five study sites in Alaska, USA collected during the March 2023 intensive observation period (IOP) as part of the NASA SnowEx 2023 field campaign. Temporal range spans from 7 March 2023 to 16 March 2023. 

SNPP VIIRS data processing is currently on hold after the satellite failed to return to Earth Pointing mode after a Command and Data Processor Reset effort. The Calibration and Validation team has decided to hold all SNPP VIIRS processing until data collection resumes and the Calibration and Validation team can validate the data quality.

Versions 4 of both ATLAS/ICESat-2 L3B Gridded Antarctic and Arctic Land Ice Height (ATL14) and ATLAS/ICESat-2 L3B Gridded Antarctic and Arctic Land Ice Height Change (ATL15) are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). ATL14 is a high-resolution (100 m) digital elevation model (DEM) that provides spatially continuous gridded data of ice sheet surface height.

The SnowEx23 Mar22 IOP Snow Depth 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 snow depth measurements from two regions of Alaska, USA collected during the March 2022 intensive observation period (IOP) as part of the NASA SnowEx 2023 field campaign.Temporal range spans from 8 March 2022 to 23 March 2022.

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 December 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 2 of the Calibrated Enhanced-Resolution Passive Microwave Daily EASE-Grid 2.0 Brightness Temperature ESDR data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This new version includes improvements in cross-sensor calibration and quality checking, modern file formats, better quality control, improved projection grids, and local time-of-day (LTOD) processing.

High Mountain Asia 4-km Dynamically Downscaled Meteorological Data, 2000-2015, Version 1 is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains simulated meteorological data for the Indus Basin from 2000 through 2015, at three horizontal resolutions (36 km, 12 km, and 4 km) and nine pressure levels spanning 1000 hPa – 200 hPa.

The SnowEx20 Grand Mesa IOP Lidar and GPR-Derived Snow Water Equivalent and Snow Density, Version 1 and SnowEx20 Grand Mesa IOP QSI Lidar Snow Depth Data, 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 rasterized snow depth maps derived from lidar point cloud data collected from Grand Mesa, Colorado during the SnowEx20 campaign.

The Near Real-time SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 105 and Near Real-time SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture, Version 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 12:41 MT July 10th.

All SNPP VIIRS forward processing has been temporarily suspended due to a GPS anomaly issue that began on July 9, 2024. An attempt to restore nominal conditions is expected within the next week. Once the issue is resolved, data may still be held for additional testing and quality assurance before it is released to the public. For more details, users may also refer to the VIIRS alerts posted here: https://ladsweb.modaps.eosdis.nasa.gov/alerts-and-issues/ 

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 31 December 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.

Version 2 of SnowEx20 Time Series Snow Pit Measurements is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). The data set is a time-series of snow pit measurements obtained during the 2020 campaign at locations throughout California, Colorado, Idaho, New Mexico, and Utah, USA. Version 2 updates include: SWE algorithm correction, updated snow pit coordinates, and correction of transcription errors.