NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC)

The ATLAS/ICESat-2 L3B Annual Land Ice Height, Version 1 (ATL11) 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). This data contains surface height estimates both for crossovers and for along-track reference points between crossovers.

The MEaSUREs Northern Hemisphere Polar EASE-Grid 2.0 Daily 6 km Land Freeze/Thaw Status from AMSRE and AMSR2, Version 1 data set, accessible from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated. The daily binary files from 01 January 2017 to 31 December 2017 have been replaced with updated versions due to the discovery of bad PER FT values in the original files.

The LVIS L1A Geotagged Images, 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 geotagged images collected from 21 May 2019 through 08 August 2019 over the United States, Western Canada, and Central America. The images were taken by two NASA Digital Mapping Cameras which were mounted alongside the Land, Vegetation, and Ice Sensor (LVIS), an airborne lidar scanning laser altimeter.

The ATLAS/ICESat-2 L3B Daily and Monthly Gridded Sea Ice Freeboard, Version 1 (ATL20) 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). This data contains daily and monthly gridded estimates of sea ice freeboard height, derived from along-track freeboard height estimates in the ATLAS/ICESat-2 L3A Sea Ice Freeboard product (ATL10).

The MODIS/Aqua CGF Snow Cover Daily L3 Global 500m SIN Grid, Version 6.1 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 cloud-free snow cover derived from the MODIS/Aqua Snow Cover Daily L3 Global 500m SIN Grid data set (MYD10A1). Data are provided on 10° x 10° tiles projected to the 500 m sinusoidal grid.

Data set DOI: https://doi.org/10.5067/MODIS/MYD10A1F.061

The AfriSAR LVIS L1A Geotagged Images, 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 geotagged images collected over Gabon, Africa from 20 February 2016 through 8 March 2016. The images were taken by the NASA Digital Mapping Camera paired with the Land, Vegetation, and Ice Sensor (LVIS), an airborne lidar scanning laser altimeter.

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 revised. Version 3 of this data set was inadvertently released with version 2 data files for the period 01 January 2016 to 31 December 2018. These files were replaced with the correct version on 12 October 2020.

The IceBridge ATM L2 Icessn Elevation, Slope, and Roughness, Version 2 data set has been updated to include data from the 2019 Arctic summer campaign, from 04 September 2019 through 14 September 2019, at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).This data set contains resampled and smoothed elevation measurements of Arctic and Antarctic sea ice, and Greenland, Antarctic Peninsula, and West Antarctic region land ice surface acquired using the NASA Airborne Topographic Mapper (ATM)

The IceBridge ATM L1B Near-Infrared Waveforms, Version 1 data set has been updated to include data from the 2019 Arctic summer campaign, from 04 September 2019 through 14 September 2019, at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains geolocated waveforms of Greenland, Arctic, and Antarctic sea ice measured by the Airborne Topographic Mapper (ATM) near-infrared (NIR) lidar.

The IceBridge ATM L1B Elevation and Return Strength with Waveforms, Version 1 data set has been updated to include data from the 2019 Arctic summer campaign, from 04 September 2019 through 14 September 2019, at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

The IceBridge ATM L1B Elevation and Return Strength, Version 2 data set has been updated to include data from the 2019 Arctic summer campaign, from 04 September 2019 through 14 September 2019, at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains spot elevation measurements of Arctic and Antarctic sea ice, and Greenland, Antarctic Peninsula, and West Antarctic region ice surface acquired by the NASA Airborne Topographic Mapper (ATM) instrumentation.

The IceBridge Narrow Swath ATM L1B Elevation and Return Strength with Waveforms, Version 1 data set has been updated to include data from the 2019 Arctic summer campaign, from 04 September 2019 through 14 September 2019, at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains spot elevation measurements with corresponding waveforms of Greenland, Arctic, and Antarctic sea ice.

The IceBridge Narrow Swath ATM L1B Elevation and Return Strength, Version 2 data set has been updated to include data from the 2019 Arctic summer campaign, from 04 September 2019 through 14 September 2019, at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains spot elevation measurements of Greenland, Arctic, and Antarctic sea ice acquired using the NASA Airborne Topographic Mapper (ATM) narrow-swath instrumentation.

The DMSP SSM/I-SSMIS Pathfinder Daily EASE-Grid 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 through 31 August 2020. This data set contains gridded data from the Special Sensor Microwave/Imager (SSM/I) and the Special Sensor Microwave Imager/Sounder (SSMIS) in three equal-area projections: Northern Hemisphere, Southern Hemisphere, and full global.

The DMSP SSM/I-SSMIS Daily Polar Gridded Brightness Temperatures, Version 5 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated through 31 August 2020. This data set contains daily gridded brightness temperatures derived from passive microwave sensors and distributed in a polar stereographic projection.

The MEaSUREs BedMachine Antarctica, Version 2 data set, accessible from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated to a new version. Additional ice thickness data have been used to constrain the bed topography under grounded ice, and new multi beam ocean bathymetry data and gravity inversions have been integrated for the Amundsen sea embayment. An error in geoid height was also corrected for the IBCSO bathymetry.

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 2019. 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 geolocation for one flight from the IceBridge DMS L1B Geolocated and Orthorectified Images, Version 1 data set's 2018 Arctic campaign archived at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been refined. The reprocessing applies only to the last 1092 frames from 07 April 2018. The existing 1092 files were replaced by the reprocessed files on 23 September 2020.

Data set DOI: https://doi.org/10.5067/OZ6VNOPMPRJ0

The SnowEx20 Senator Beck Basin Transect Ground Surface Temperature, Version 1, is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set contains hourly ground surface temperature measurements collected between 20 October 2019 and 18 July 2020. Data were collected at 7 points along two plant monitoring transects in the Upper Basin of the Senator Beck Study Basin. Temperatures were measured using iButton temperature sensors.

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 to a new version and new data access options are also available. New data have been added so the data set now spans 1 March 1985 - 31 December 2019.