Data Announcements

The Daily Global Land Parameters Derived from AMSRE and AMSR2, Version 3 data set, accessible from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), is now available. The data have been reprocessed using the same algorithm as previous versions except it includes some refinements and performance enhancements, and a new VPD land parameter is now included. New data have also been added, so the record now spans 19 June 2002 to 31 December 2020.

NOAA@NSIDC is pleased to announce that photos of glaciers in the Kenai Fjords National Park have been added to the Glacier Photograph Collection. These 281 photos are a special collection of photos that are part of an ongoing repeat photography project documenting coastal glacier change in Kenai Fjords National Park in south-central Alaska. The oldest photos in the collection were taken in the summer of 1909 when USGS surveyors, U.S. Grant and D.F. Higgins, completed a detailed survey of the tidewater glaciers along the southeastern coast of the Kenai Peninsula.

The ATLAS/ICESat-2 L3B Daily and Monthly Gridded Polar Sea Surface Height Anomaly, 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 daily and monthly gridded polar sea surface height (SSH) anomaly, derived from the along-track ATLAS/ICESat-2 L3A Sea Ice Height product (ATL10, V4). The ATL10 product identifies leads in sea ice and establishes a reference sea surface used to estimate SSH in 10 km along-track segments.

The High Mountain Asia 1km 6-hourly Downscaled Meteorological Data 2003 to 2018, 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 0.01 degree (nominally 1km) 6-hourly downscaled European Centre for Medium-Range Weather Forecasts (ECMWF) atmospheric forcings and Climate Hazards Group InfraRed Precipitation with Station data (CHIRPS) precipitation from 2003 to 2018 across the High Mountain Asia region.

The MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR, Version 4 data set, accessible from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) is now available. Images created from data acquired on or after 1 January 2015 have been reprocessed using a corrected DEM. The GeoTIFFS are available in the latest cloud optimized format. New data have also been added so the data set now spans 12 June 2008 to 12 December 2020.

The ATLAS/ICESat-2 L3A Along Track Inland Surface Water Data, Version 4 (ATL13) data set from the Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) mission is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

The following 2 data sets are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC): SnowEx20 Grand Mesa IOP CSU 1GHz GPR, Version 1 SnowEx20 Grand Mesa IOP CSU 1GHz GPR Raw, Version 1

The IceBridge BedMachine Greenland, Version 4 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 comprehensive level of service. This data set contains a bed topography/bathymetry map of Greenland based on mass conservation, multi-beam data, and other techniques. It also includes surface elevation and ice thickness data, as well as an ice/ocean/land mask. Data set DOI: https://doi.org/10.5067/VLJ5YXKCNGXO

The MEaSUREs Greenland Image Mosaics from Sentinel-1A and -1B, Version 4 data set, accessible from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) is now available. The data have been reprocessed using a corrected DEM and the data set now spans 1 January 2015 to 27 February 2021. This data set is part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program.

The MEaSUREs Greenland Annual/Quarterly/Monthly Ice Sheet Velocity Mosaics from SAR and Landsat, Version 3 data sets, accessible from the National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) are now available. These annual, quarterly and monthly data sets have been reprocessed using a corrected DEM and the GeoTIFFs are now cloud optimized. New data have been added so the data sets now span 01 December 2014 - 30 November 2020.

NOAA@NSIDC is pleased to announce that the NOAA@NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 4 data set, accessible through the National Snow and Ice Data Center (NSIDC), is now available. The main changes in this new version are:

NOAA@NSIDC is pleased to announce that the Near-Real-Time NOAA@NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration, Version 2 data set, accessible through the National Snow and Ice Data Center (NSIDC) is now available. The main changes in this new version are:

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 31 December 2020. 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 SnowEx20 Airborne SWESARR Brightness Temperature, 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 airborne microwave brightness temperature observations that were made between 10 to 12 February 2020, during the SnowEx20 campaign at Grand Mesa, Colorado.

The AMSR-E/AMSR2 Unified L3 Global Daily/5-Day/Monthly 25km EASE-Grid Snow Water Equivalent, Version 1 data sets, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been updated. The data have been reprocessed to correct for the artificial, uniform boundary extending across North America for the snow water equivalent (SWE) values. The filenames for these reprocessed data contain ‘B02’ instead of ‘B01’.

The Nenana Ice Classic: Tanana River Ice Annual Breakup Dates, Version 2 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated. The ice breakup date for 2021 has been added, so the data set now spans 1 April 1917 to 30 April 2021. This data set provides the date and time when the Tanana River ice, in the town of Nenana, AK, breaks up each spring.

The following 5 data sets are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC):

NOAA@NSIDC is pleased to announce that the Multisensor Analyzed Sea Ice Extent (MASIE) data set is now available in NetCDF4 format. Both the 1 km and 4 km resolution data are available in this new format with surface type classifications for sea ice, land, coastline, lake, ocean, and missing. The NetCDF files are for the full Northern Hemisphere-wide MASIE product; the regional data are not included. Ancillary 4 km and 1 km latitude and longitude NetCDF files are also provided to accompany the NetCDF data files.

The Lagrangian Snow Distributions for Sea-Ice Applications, 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 daily estimates of snow depth and density for snow-on-sea-ice in the Arctic Ocean, generated using a Lagrangian snow-evolution model. It spans 01 August 1980 to 31 July 2018 and the spatial resolution is 25 km.

NOAA@NSIDC is pleased to announce that the Sea Ice Index has been updated from near-real-time data to final data for the time period 01 January 2020 through 31 December 2020. Initially, when the Sea Ice Index is first processed, it uses a near-real-time (NRT) sea ice concentration product as its input. This NRT product can contain missing data and has less quality control procedures applied to it than the final sea ice concentration input product provided by NASA Goddard. However, the final input product often lags behind the present by approximately a year.