NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC)
Data Updates
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), is now available. The data set has been reprocessed using SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 5 as input. This input is different enough from version 1 that users should not mix gridded version 1 and 2 data.
The Two-dimensional Velocities of Ice Mélange from Jakbobshavn Isbræ, Greenland, 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 velocity components and resolved speeds for the proglacial ice mélange at Jakobshavn Glacier, Greenland. An ice mélange is defined as a tightly packed collection of icebergs and sea ice which abut the terminus of a glacier.
The IceBridge CAMBOT L1B Geolocated Images, Version 2 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated with improved georeferencing for nine sea ice flights. This data set contains high-resolution imagery taken with the Continuous Airborne Mapping By Optical Translator (CAMBOT) system over Antarctica and Greenland.
The MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from Optical Images, Version 3 data set, accessible from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated. New data have been added so the data set now spans 1 March 1985 - 31 December 2020. This data set is part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program. It consists of mean monthly velocity maps for selected glacier outlet areas.
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.
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):
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.
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):
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.
The High Mountain Asia Multitemporal Landslide Inventories, 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 landslide point locations along three important highways in Nepal: the Arniko, Karnali, and Pasang Lhamu highway. Data were derived from RapidEye satellite imagery and have a temporal coverage of 01 December 2009 to 31 December 2018.