Data Announcements

The SMAPVEX19-22 Millbrook Airborne Lidar and SMAPVEX19-22 Massachusetts Airborne Lidar, Version 1 data sets, are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). These lidar measurements were collected in April and August 2022 in the vicinity of Millbrook, NY, and Petersham, MA during the SMAPVEX19-22 campaign.

NOAA@ NSIDC is pleased to announce that MASAM2: Daily 4 km Arctic Sea Ice Concentration, Version 2 is now available. MASAM2 is a blend of the 4 km Multisensor Analyzed Sea Ice Extent – Northern Hemisphere (MASIE-NH) ice extent product and a 10 km AMSR2 sea ice concentration product. With Version 2, the data set provides ice concentration values that may range between 40 percent and 100 percent everywhere that the MASIE product has detected ice.

Version 3 of the ATLAS/ICESat-2 L3B Monthly Gridded Dynamic Ocean Topography (ATL19) data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been released.  This data set contains monthly gridded dynamic ocean topography, derived from the along-track ATLAS/ICESat-2 L3A Ocean Surface Height product (ATL12).  Temporal coverage currently spans 14 October 2018 to 01 April 2023 and is updated regularly.  Spatial coverage is global.  Changes with

NOAA@NSIDC is pleased to announce that the Arctic Sea Ice Concentration and Extent from Danish Meteorological Institute Sea Ice Charts, 1901-1956, Version 1 data set has been updated to Version 1.1. Version 1.1 adds quarter-degree gridded fields of sea ice concentration in NetCDF format to the existing shapefile and image representations of ice concentration from the Danish chart series.

The Northern Hemisphere EASE-Grid 2.0 Weekly Snow Cover and Sea Ice Extent, Version 4 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated through 1 January 2023. This data set contains snow cover and sea ice extent derived from SMMR and DMSP-F8, -F11, -F13, and -F17 SMM/I and SSMIS brightness temperature measurements. These data are provided on the 25 km Northern Hemisphere EASE-Grid 2.0.

The SMAP Radiometer Twice-Daily rSIR-Enhanced EASE-Grid 2.0 Brightness Temperatures, Version 2 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 from 1 May 2021 to 31 December 2022. This data set contains twice-daily, enhanced-resolution brightness temperature data derived from the SMAP radiometer. Data set DOI: https://doi.org/10.5067/YAMX52BXFL10

The 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 data sets, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been released.

Version 6 of the ATLAS/ICESat-2 L3B Slope-Corrected Land Ice Height Time Series (ATL11) data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), is now available.

The High Mountain Asia CMIP6 Monthly and Yearly Water Balance Projections, 2016-2099 for Parts of Afghanistan, Tajikistan, Kyrgyzstan, and Pakistan, Version 1 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

On 7 July 2023 the FOT (Flight Operation Team) transitioned fully to LOOps (Light-Out-Operations) following successful testing and Ops Readiness Review. Estimated data acquisitions are expected to remain above the mission data capture guideline of 95%. Beginning 7 July 2023 onward, all Terra, Aqua, and combined Terra+Aqua MODIS Version 6.1 data products will be directly impacted by these occurrences of non-recoverable data loss.

The MEaSUREs Polar EASE-Grid 2.0 Daily 6 km Land Freeze/Thaw Status from AMSR-E and AMSR2, Version 2 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated through 31 December 2021. The daily GeoTIFF files from 2002 to 2020 have been replaced. Although the data in these files has not been modified, the file metadata has been updated to comply with a new standard for all daily GeoTIFF files, starting with the 2021 temporal coverage extension.

NOAA@NSIDC is pleased to announce the release of the Arctic Ice Dynamics Joint Experiment (AIDJEX) Second Pilot Study, March - May 1972: Still Images, Version 1. This dataset contains 83 JPEG photos, mainly taken during a 1972 pilot study in preparation for the main AIDJEX experiment of 1975 to 1976. The dataset also includes a few aerial photographs of ice island T-3, which are not related to AIDJEX.  The pilot study included a main camp on drifting sea ice in the Beaufort Sea, north of Alaska, along with two satellite camps.

NSIDC is pleased to announce the release of the Marginal Ice Zone 2014 Field Campaign, Version 1 data set. The field campaign was a component of a U.S. Office of Naval Research (ONR) Departmental Research Initiative (DRI), and was led by the Applied Physics Laboratory at the University of Washington (APL-UW).

The Snow Melt Onset Over Arctic Sea Ice from SMMR and SSM/I-SSMIS Brightness Temperatures Version 5 data set, available through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated to include data through 2022.

Version 6 of the ATLAS/ICESat-2 L3A Sea Ice Height (ATL07) and ATLAS/ICESat-2 L3A Sea Ice Freeboard (ATL10) data sets, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been released.

All Terra- and Aqua-MODIS forward-processing was resumed on July 31, 2023, and the SNPP- and JPSS1-VIIRS forward-processing was resume on August 1, 2023. NSIDC is currently working to ingest the backlog of MODIS and VIIRS data, which may take several days. Users should expect a permanent data gap in the SNPP VIIRS data sets for the period ~2:03:33 UTC on Jul 26, 2023 through ~16:50 UTC July 27.

The MODIS Version 6 (Collection 6) snow cover and sea ice data sets, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) will be retired on 22 August 2023.  After this date, the NSIDC DAAC will cease distribution of all Terra MODIS and Aqua MODIS Version 6.0 (Collection 6.0) snow cover and sea ice data sets.  Documentation will remain available for future reference.  The NSIDC strongly encourages users to switch to the newer MODIS Version 6.1 (Collection 6.1) data.

On July 26, 2023, at approximately 01:56 UTC, the SNPP spacecraft and all onboard instruments (including VIIRS) entered safe mode, pausing data collection. The SNPP VIIRS instrument was returned to operational mode at approximately 16:50 UTC on July 27, 2023. There will be a gap in temporal coverage during the period the instrument was in safe mode, between approximately 01:56 UTC Jul 26, 2023 through 16:50 UTC July 27, 2023. The products generated during the period after recovery from spacecraft anomaly may be reprocessed using the new LUT if it is deemed necessary.  

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 2023. This data set provides daily gridded brightness temperatures derived from passive microwave sensors and distributed in a polar stereographic projection.

The MEaSUREs Greenland 6 and 12 day Ice Sheet Velocity Mosaics from SAR, Version 2 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated. The velocity mosaics data now cover the period from 1 January 2015 to 24 May 2023.