Data Announcements

ATLAS/ICESat-2 L3A Along Track Coastal and Nearshore Bathymetry, Version 2 is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains global along-track coastal and nearshore bathymetry, consisting of refraction-corrected seafloor and sea surface heights (orthometric and ellipsoidal heights and instantaneous depths), as well as associated uncertainties.

ICESat-2 Cal/Val 2022 L2 CHIR NIR Lidar Arctic Sea Ice Heights, Version 1 is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains Arctic summer sea ice heights acquired using the Leica Chiroptera 4X (CHIR) airborne lidar system. The near-infrared (NIR) lidar data were acquired during a July 2022 calibration/validation airborne campaign to evaluate the positional accuracies of NASA’s ICESat-2 ATLAS measurements.

The Near-Real-Time DMSP SSM/I-SSMIS Daily Polar Gridded Brightness Temperatures, Version 2, and Near-Real-Time DMSP SSMIS Daily Polar Gridded Sea Ice Concentrations, Version 2 data sets will be retired from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) on 18 June 2026. After this date, access to the data will no longer be available, but the data set documentation will remain available for future reference. 

The Nenana Ice Classic: Tanana River Ice Annual Breakup Dates, Version 2 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated with the latest ice breakup date and time for 2026.

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 have been added for the year 2025, extending the temporal coverage to 31 December 2025.

The SnowEx20 Airborne SWESARR Backscatter Intensity Raw, Version 1 (SNEX20_SWESARR_Raw) and SnowEx20 Grand Mesa IOP FMCW Radar Autopicked Snow Depths, Version 1 (SNEX20_FMCW_SD) data sets are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). The SNEX20_SWESARR_Raw data set contains raw airborne microwave observations from the Goddard Space Flight Center SWESARR instrument.

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 2026. This data set provides daily gridded brightness temperatures derived from passive microwave sensors and distributed in a polar stereographic projection.

ATLAS/ICESat-2 L3B Gridded Antarctic and Arctic Land Ice Height, Version 4 and ATLAS/ICESat-2 L3B Gridded Antarctic and Arctic Land Ice Height Change, Version 4 will be retired from the NSIDC DAAC on 22 June 2026. Upon retirement, data will no longer be accessible, but all related documentation will remain available on the data set’s web page for future reference. We recommend using the latest version of these data sets, found under the “more recent version” link on the web pages.

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 2025. 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 temporal coverage extending back to 1 November 1978.

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 2025. 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.

Forward processing of SMAP L1B Radiometer Half-Orbit Radio Frequency Interference and Calibration Data, Version 6, is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set is an intermediate Level 1B radiometer data product generated by NASA’s Soil Moisture Active Passive (SMAP) mission and serves as input to the production of SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 6.

MEaSUREs Precipitation Phase and Rate from Passive Microwave Observations and Earth System Models using Transfer Learning, Version 1 is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains estimates of precipitation phase (rain, snow, or clear) and total precipitation rate at approximately 5.1 km × 13.2 km resolution along the GPM Microwave Imager (GMI) S1 swath for the time period 7 April 2014 to 6 May 2025.

The SnowEx 2020 Reynolds Creek Experimental Watershed Snow Products, 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 SWE data collected from the Reynolds Creek Experimental Watershed, Idaho as part of the NASA SnowEx20 field campaign. Temporal coverage spans from 15 November 2018 to 23 February 2020.

The Moderate Resolution Imaging Spectroradiometer (MODIS), Version 61 (Collection 61) and Visible Infrared Imaging Radiometer Suite (VIIRS), Version 2 (Collection 2) data sets, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been updated to include browse imagery.  Back processing of any missing browse will be completed in the near future.

NSIDC is pleased to announce that we have added new regions to Snow Today that include Alaska and four Canadian provinces (Yukon, Northwest Territories, British Columbia, and Alberta). This comes as part of Snow Today’s ongoing data expansion effort.

The SMAP Radiometer Twice-Daily rSIR-Enhanced EASE-Grid 2.0 Brightness Temperatures, Version 3 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated through December 31, 2025. This data set contains twice-daily, enhanced-resolution brightness temperature data produced by image reconstruction of the standard SMAP product, SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures (SPL1BTB).

NOAA@NSIDC is pleased to announce that 162 new photographs have been added to the Glacier Photograph Collection. These images span 1896–2025 and include:

The MEaSUREs Multi-year Reference Velocity Maps of the Antarctic Ice Sheet, Version 1 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated. Temporal coverage has been extended, with a new map added covering 1 July 2020 – 30 June 2022.

The MEaSUREs Annual Antarctic Ice Velocity Maps, 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, extending the temporal coverage to June 30, 2025.

ATLAS/ICESat-2 L3B Slope-Corrected Land Ice Height Time Series (ATL11), Version 6, ATLAS/ICESat-2 L3B Daily and Monthly Gridded Sea Ice Freeboard (ATL20), Version 4 and ATLAS/ICESat-2 L3B Daily and Monthly Gridded Polar Sea Surface Height Anomaly (ATL21), Version 3 will be retired from the NSIDC DAAC on 11 May 2026.