The MEaSUREs Northern Hemisphere Polar EASE-Grid 2.0 Daily 6 km Land Freeze/Thaw Status from AMSR-E 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 issue appears to be isolated to files from March to December, but the whole year has been replaced as a precaution. If you downloaded any binary files for 2017, we recommend downloading the updated files.

This data set is part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program. It consists of a Northern Hemisphere daily landscape Freeze/Thaw status at 6 km resolution.

Data set DOI: https://doi.org/10.5067/WM9R9LQ2SA85

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.

This data set is part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program. It contains a bed topography/bathymetry map of Antarctica based on mass conservation, streamline diffusion, and other methods.

Data set DOI: https://doi.org/10.5067/E1QL9HFQ7A8M

The MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR, 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. This data set is part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program. It provides velocity estimates determined from Interferometric Synthetic Aperture Radar (InSAR) data for major glacier outlet areas in Greenland. The maps are produced from image pairs measured by the German Aerospace Center’s (DLR) twin satellites TerraSAR-X / TanDEM-X (TSX / TDX).

Images created from data acquired on or after 1 January 2015 were processed using a newer DEM, the MEaSUREs Greenland Ice Mapping Project (GIMP) Digital Elevation Model from GeoEye and WorldView Imagery (GIMP DEM V2). For images created using data prior to 1 January 2015, the same DEM as in version 2 was used, the MEaSUREs GIMP Digital Elevation Model (GIMP DEM V1). A field has been added to the .meta file to indicate which DEM was used in the processing. New data have also been added so the data set now spans 12 June 2008 to 3 January 2020.

Data set DOI: https://doi.org/10.5067/YXMJRME5OUNC

New data access options are available for the MEaSUREs Greenland Ice Mapping Project (GIMP) Digital Elevation Model from GeoEye and WorldView Imagery, Version 1 data set, accessible from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). The data access location for this data set has changed. Users accessing this data set through a script will need to update accordingly. The new data access URL is: https://n5eil01u.ecs.nsidc.org/MEASURES/NSIDC-0715.001/.

This data set is part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program. It consists of an enhanced resolution digital elevation model (DEM) for the Greenland Ice Sheet. The DEM is derived from sub-meter resolution, panchromatic stereoscopic imagery collected by the GeoEye-1, WorldView 1, WorldView 2 and WorldView 3 satellites operated by DigitalGlobe Inc.

Data set DOI: https://doi.org/10.5067/H0KUYVF53Q8M

New data access options are available for the MEaSUREs Greenland Ice Mapping Project (GIMP) Land Ice and Ocean Classification Mask, Version 1 data set, accessible from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). The data access location for this data set has changed. Users accessing this data set through a script will need to update accordingly. The new data access URL is https://n5eil01u.ecs.nsidc.org/MEASURES/NSIDC-0714.001/.

This data set is part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program. It provides a complete land ice and ocean classification mask for the Greenland ice sheet, that was mapped using a combination of USGS Landsat 7 ETM+ panchromatic band imagery, and the Canadian Space Agency’s (CSA) RADARSAT-1 Synthetic Amplitude Radar (SAR) amplitude images.

Data set DOI: https://doi.org/10.5067/B8X58MQBFUPA

New data access options are available for the MEaSUREs Phase-Based Antarctica Ice Velocity Map, Version 1 data set, accessible from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). The direct download location for this MEaSUREs (Making Earth System Data Records for Use in Research Environments) data set has changed.

This data set combines interferometric phases from multiple satellite interferometric synthetic-aperture radar systems to derive the first comprehensive phase-based map of Antarctic ice velocity. Phase-derived velocity mostly covers the years between 2007 and 2018, while tracking-derived velocity (for regions along the coasts) is mostly found in the years from 2013 to 2017. Additional data acquired between 1996 and 2018 were used as needed to maximize coverage.

Data set DOI: https://doi.org/10.5067/PZ3NJ5RXRH10

The MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR, Version 2 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set, part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, provides velocity estimates determined from Interferometric Synthetic Aperture Radar (InSAR) data for major glacier outlet areas in Greenland beginning 12 June 2008. The InSAR Selected Glacier Site Velocity Maps are produced from the German Aerospace Center’s (DLR) TerraSAR-X/TanDEM-X (TSX/TDX) image pairs.

Version 2 of this data set includes a full reprocessing of an accumulation of minor updates, but output should be generally consistent with previous versions. This update also includes an extension of the data set through September 2019, the addition of consistent NoData values, corrected browse images, the inclusion of a velocity magnitude geoTIFF, and cloud optimized geoTIFF files.

Data set DOI: https://doi.org/10.5067/JQHJUOYCF2TE

The MEaSUREs BedMachine Antarctica, 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, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program, contains a bed topography/bathymetry map of Antarctica based on mass conservation, streamline diffusion, and other methods. The data set also includes ice thickness, surface elevation, an ice/ocean/land mask, ice thickness estimation errors, and a map showing where each method was utilized. 

Data set DOI: https://doi.org/10.5067/C2GFER6PTOS4

The MEaSUREs Phase-Based Antarctica Ice Velocity Map, 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, produced under the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, combines interferometric phases from multiple satellite interferometric synthetic-aperture radar systems to derive the first comprehensive phase-based map of Antarctic ice velocity. Phase-derived velocity mostly covers the years between 2007 and 2018, while tracking-derived velocity (for regions along the coasts) is mostly found in the years from 2013 to 2017. Additional data acquired between 1996 and 2018 were used as needed to maximize coverage.

Data set DOI: https://doi.org/10.5067/PZ3NJ5RXRH10

The MEaSUREs Greenland Image Mosaics from Sentinel-1A and -1B, Version 2 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated with mosaics through June 2019. Additionally, the GDAL virtual format (.vrt) files have been updated to reflect updated filenames. This data set is produced under the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program and contains 6-day and 12-day 50 m resolution image mosaics of the Greenland coastline and ice sheet periphery. The mosaics are derived from C-band Synthetic Aperture Radar (C-SAR) acquired by the Copernicus Sentinel-1A and -1B imaging satellites starting in January 2015.

Data set DOI: https://doi.org/10.5067/GPVL3SACPBW4

The MEaSUREs Greenland Annual Ice Sheet Velocity Mosaics from SAR and Landsat, Version 1 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated to include data for 2018. This data set contains annual ice velocity mosaics for the Greenland Ice Sheet derived from Synthetic Aperture Radar (SAR) data obtained by the German Space Agency’s TerraSAR-X/TanDEM-X (TSX/TDX), the European Space Agency’s Copernicus Sentinel-1A and -1B satellites, and the US Geological Survey’s Landsat 8 optical imagery.

Data set DOI: https://doi.org/10.5067/OBXCG75U7540

The MEaSUREs Global Record of Daily Landscape Freeze/Thaw Status, 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 data for 2017. This data set, part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, contains two global records of the daily freeze/thaw (F/T) status of the landscape. The primary record is derived from radiometric brightness temperatures acquired between 1979 and 2017 by three passive microwave sensors: the Scanning Multichannel Microwave Radiometer (SMMR), the Special Sensor Microwave/Imager (SSM/I), and the Special Sensor Microwave Imager/Sounder (SSMIS). A second, synergistic record is available for the years 2002 to 2017 derived from observations acquired by the Advanced Microwave Scanning Radiometer – Earth Observing System (AMSR-E) and the Advanced Microwave Scanning Radiometer 2 (AMSR2).

Data set DOI: https://doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0477.004

New data access options are available for the MEaSUREs Greenland Ice Mapping Project (GIMP) 2000 Image Mosaic, Version 1 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). The download location for this data set has changed, and both spatial and temporal searching are now available through Earthdata Search. This data set is produced under the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program and provides a complete 15 m resolution image mosaic of the Greenland ice sheet, derived from USGS Landsat 7 ETM+ imagery and Canadian Space Agency’s (CSA) RADARSAT-1 imagery from the years 1999 to 2002.

Users accessing this data set through a script will need to update accordingly. The new data access URL is below:
https://n5eil01u.ecs.nsidc.org/MEASURES/NSIDC-0713.001/

Data set DOI: https://doi.org/10.5067/4RNTRRE4JCY

The MEaSUREs Northern Hemisphere Polar EASE-Grid 2.0 Daily 6 km Land Freeze/Thaw Status from AMSR-E and AMSR2, Version 1 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated to include data through 31 December 2017. This data set, part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, consists of a Northern Hemisphere daily landscape freeze/thaw status at 6 km resolution. The data are derived from observations acquired by the Advanced Microwave Scanning Radiometer – Earth Observing System (AMSR-E) and the Advanced Microwave Scanning Radiometer 2 (AMSR2).

Data set DOI:  https://doi.org/10.5067/WM9R9LQ2SA85

The MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR, Version 1 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been updated with data through September 2018. Additional data for 2016 and 2017 were also added to the W68.60N grid.

This data set, part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, provides velocity estimates determined from Interferometric Synthetic Aperture Radar (InSAR) data for major glacier outlet areas in Greenland beginning 1 January 2009. The InSAR Selected Glacier Site Velocity Maps are produced from the German Aerospace Center’s (DLR) TerraSAR-X/TanDEM-X (TSX/TDX) image pairs.

Data access options have been updated for the MEaSUREs Antarctic Grounding Line from Differential Satellite Radar Interferometry, Version 2 data set accessible from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). The direct download location for this MEaSUREs (Making Earth System Data Records for Use in Research Environments) data set has changed, and both temporal searching and ordering are now available through NASA Earthdata Search using the Package Options button on the data set web page.

This data set provides 22 years of comprehensive high-resolution mapping of grounding lines in Antarctica from 1992 to 2014. The data were derived using differential satellite synthetic aperture radar interferometry (DInSAR) measurements from the following platforms: Earth Remote Sensing Satellites 1 and 2 (ERS-1 and ERS-2), RADARSAT-1, RADARSAT-2, the Advanced Land Observing System Phased Array type L-band Synthetic Aperture Radar (ALOS PALSAR), Cosmo Skymed, and Copernicus Sentinel-1.

Data set DOI: https://doi.org/10.5067/IKBWW4RYHF1Q

The MEaSUREs Greenland Ice Sheet Velocity Map from InSAR Data, Version 2 data set has been updated to include data from Winter 2017/2018 and is available from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program, contains seasonal (winter) ice-sheet-wide velocity maps for Greenland. The maps are derived from Interferometric Synthetic Aperture Radar (InSAR) data obtained by the Canadian Space Agency’s (CSA) RADARSAT-1, the Japan Aerospace Exploration Agency’s (JAXA) Advanced Land Observation Satellite (ALOS), and the German Aerospace Center’s (DLR) TerraSAR-X/TanDEM-X (TSX/TDX) satellites, as well as from the European Space Agency’s (ESA) C-band Synthetic Aperture Radar data from Copernicus Sentinel-1A and -1B.

Additional changes include updating the shapefiles from winters 2014 to 2018, changing the velocity magnitude file name, and changing the missing data value for the velocity magnitude (vv) files to -1 and setting it as the attribute in all files.

Data set DOI: https://doi.org/10.5067/OC7B04ZM9G6Q

The MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR, Version 1 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been updated with data through December 2017. This data set, part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, provides velocity estimates determined from Interferometric Synthetic Aperture Radar (InSAR) data for major glacier outlet areas in Greenland beginning 1 January 2009. The InSAR Selected Glacier Site Velocity Maps are produced from the German Aerospace Center’s (DLR) TerraSAR-X/TanDEM-X (TSX/TDX) image pairs.

Data set DOI: https://doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0481.001

The MEaSUREs MODIS Mosaic of Antarctica 2013-2014 (MOA2014) Image Map, Version 1 data set is now available from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, includes two image maps produced from composited image swath data acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS) over Antarctica for the 2013-2014 austral summer season. The two image maps, a snow grain size map and a surface morphology map, are both provided at two different grid scales of 125 m and 750 m resolution. These data are a follow on to the MOA2004 and MOA2009 data sets.

Version 1.3 of the MEaSUREs Calibrated Enhanced-Resolution Passive Microwave Daily EASE-Grid 2.0 Brightness Temperature ESDR, Version 1 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) for all sensors. The changes in this minor version update vary depending on the sensor and are listed by sensor in Table 11 of the user guide.

This data set is part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program.

Data Set DOI: https://dx.doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0630.001

Version 1.3 of the MEaSUREs Calibrated Enhanced-Resolution Passive Microwave Daily EASE-Grid 2.0 Brightness Temperature ESDR, Version 1 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) for the AMSR-E, F16, F17, F18 and F19 sensors. The changes in this minor version update vary depending on the sensor and are listed by sensor in Table 11 of the user guide. Data from the remaining sensors included in this data set will be reprocessed to version 1.3 soon.

This data set is part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program.

Data Set DOI: http://dx.doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0630.001

The January 2018 data is now available for the MEaSUREs Greenland Image Mosaics from Sentinel-1A and 1B, Version 2 data set at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

This data set is part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program.

Data Set DOI: http://dx.doi.org/10.5067/GPVL3SACPBW4

NSIDC DAAC would like to announce a change to data access for the MEaSUREs Greenland Ice Mapping Project (GIMP) Digital Elevation Model, Version 1. Data access is now solely through our primary archive at: https://n5eil01u.ecs.nsidc.org/MEASURES/NSIDC-0645.001/. File level spatial and temporal metadata have been added to aid in searching and ordering the data through Earthdata Search.

DOI: https://doi.org/10.5067/NV34YUIXLP9W

New 2017 data is now available for the MEaSUREs Greenland Quarterly Ice Sheet Velocity Mosaics from SAR and Landsat 8, Version 1 data set at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

This data set is part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program.

Data Set DOI: https://doi.org/10.5067/1Q1AM4U8Y892

NSIDC DAAC would like to announce a change to data access for the MEaSUREs Annual Antarctic Ice Velocity Maps 2005-2017, Version 1. Data access is now solely through our primary archive at: https://n5eil01u.ecs.nsidc.org/MEASURES/NSIDC-0720.001/. File level spatial and temporal metadata have been added to aid in searching and ordering the data through Earthdata Search.

DOI: https://doi.org/10.5067/9T4EPQXTJYW9

The MEaSUREs Greenland Quarterly Ice Sheet Velocity Mosaics from SAR and Landsat, 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, part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, contains quarterly ice velocity mosaics for the Greenland Ice Sheet derived from Synthetic Aperture Radar (SAR) data obtained by TerraSAR-X/TanDEM-X (TSX/TDX) and Copernicus Sentinel-1A and -1B satellites, and from Landsat 8 optical imagery for years 2015 and 2016.

Data Set DOI: http://dx.doi.org/10.5067/1Q1AM4U8Y892

The December 2017 data is now available for the MEaSUREs Greenland Image Mosaics from Sentinel-1A and 1B, Version 2 data set at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

This data set is part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program.

Data Set DOI: http://dx.doi.org/10.5067/GPVL3SACPBW4

The November 2017 data is now available for the MEaSUREs Greenland Image Mosaics from Sentinel-1A and 1B, Version 2 data set at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

This data set is part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program.

Data Set DOI: http://dx.doi.org/10.5067/GPVL3SACPBW4

The October 2017 data is now available for the MEaSUREs Greenland Image Mosaics from Sentinel-1A and 1B, Version 2 data set at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

This data set is part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program.

Data Set DOI: http://dx.doi.org/10.5067/GPVL3SACPBW4

The MEaSUREs Annual Antarctic Ice Velocity Maps 2005-2017, Version 1 data set at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been updated with velocity maps for 2017.

These data are generated through a grant from the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program.

Data Set DOI: http://dx.doi.org/10.5067/9T4EPQXTJYW9

The September 2017 data is now available for the MEaSUREs Greenland Image Mosaics from Sentinel-1A and 1B, Version 2 data set at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

This data set is part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program.

Data Set DOI: http://dx.doi.org/10.5067/GPVL3SACPBW4

NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) would like to announce new updates for MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from Optical Images, Version 2.  The updates include the following:

• Temporal coverage expanded to 1985-2016 using data from Landsat 4 and 5
• A more aggressive filtering method was applied to remove the following small, isolated clusters of data:
  • Ecoast-62.10N: OPT_E62.10N_2003-09, OPT_E62.10N_2003-10, OPT_E62.10N_2004-09, OPT_E62.10N_2004-10
  • Ecoast-64.65N: OPT_E64.65N_2011-09, OPT_E64.65N_2011-10
• Spatial coverage was increased by 24 new grids

DOI: 10.5067/VM5DZ20MYF5C

This data set is part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program.

Data Set DOI: http://dx.doi.org/10.5067/GPVL3SACPBW4

NSIDC DAAC would like to announce a change to data access for the MEaSUREs Multi-year Greenland Ice Sheet Velocity Mosaic, Version 1 data set. Data access is now solely available through our primary archive at: https://n5eil01u.ecs.nsidc.org/MEASURES/NSIDC-0670.001/. File level spatial and temporal metadata have been added to aid in searching and ordering the data through Earthdata Search.

DOI: http://dx.doi.org/10.5067/QUA5Q9SVMSJG

NSIDC DAAC would like to announce a change to data access for the MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR, Version 1 data set. Direct download data access has changed for this data set to https://daacdata.apps.nsidc.org/pub/DATASETS/nsidc0481_MEASURES_greenland_V01/, which allows files to be contained in folders by subregion. Data is still available for searching and ordering in Earthdata Search.

This data set is part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program.

DOI: http://dx.doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0481.001

The MEaSUREs Greenland Image Mosaics from Sentinel-1A and 1B, Version 2.1 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) with a minor version update and July 2017 data. For version 2.1, Sentinel-1, track 83 was added to the data beginning with the May 2017 mosaic. This new track improves coverage in the southern part of the ice sheet.

This data set is part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program.

Data Set DOI: http://dx.doi.org/10.5067/GPVL3SACPBW4

NSIDC would like to announce new data available for the MEaSUREs Greenland Ice Sheet Velocity Map from InSAR Data, Version 2 data set. Seasonal (winter) velocity maps for 2014/15, 2015/16, and 2016/17 from TSX/TDX and Sentinel-1 are now available. This data is posted at both 500 m and 200 m resolution. This release also includes the addition of full record ancillary shapefiles that contain information about the satellite tracks used to produce the mosaics as well as browse images of the magnitudes.

This data set is part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program.

DOI: http://dx.doi.org/10.5067/OC7B04ZM9G6Q

The F13 data from the MEaSUREs Calibrated Enhanced-Resolution Passive Microwave Daily EASE-Grid 2.0 Brightness Temperature ESDR, Version 1 data set is now available at version 1.2.  The minor change in this version corrects the handling of QC flags to retain more data, eliminating only the flagged data in a given channel and taking care not to eliminate data in other channels.

This data set is part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program.

Data Set DOI: http://dx.doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0630.001

NSIDC would like to announce a change to data access for the MEaSUREs MODIS Mosaic of Greenland 2005 (MOG2005) Image Map, Version 1 data set. Data access is now solely through our primary portal at: https://n5eil01u.ecs.nsidc.org/MEASURES/NSIDC-0547.001/. File level spatial and temporal metadata have been added to aid in searching the data.

DOI: http://dx.doi.org/10.5067/IAGYM8Q26QRE

The MEaSUREs Greenland Image Mosaics from Sentinel-1A and -1B, Version 2 data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated with mosaics through 30 June 2017. This data set, part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, provides 6- and 12-day 50 m resolution image mosaics of the Greenland coastline and ice sheet periphery.

Data Set DOI: http://dx.doi.org/10.5067/GPVL3SACPBW4

The MEaSUREs Greenland Image Mosaics from Sentinel-1A and 1B, Version 2 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). The changes for Version 2 include:

• data reprocessed with a small radiometric correction to improve consistency across seam boundaries
• temporal coverage was expanded through 31 May 2017
• dates were added to the .gif files

This data set is part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program.

Data Set DOI: http://dx.doi.org/10.5067/GPVL3SACPBW4

NSIDC would like to announce a change to data access for the MEaSUREs Annual Greenland Outlet Glacier Terminus Positions from SAR, Version 1 data set. Data access is now solely through our primary portal at: https://n5eil01u.ecs.nsidc.org/MEASURES/NSIDC-0642.001/. File level spatial and temporal metadata have been added to aid in searching the data.

DOI: http://dx.doi.org/10.5067/DC0MLBOCL3EL

MEaSUREs has added SSMIS data from the F17, F18, and F19 platforms to the MEaSUREs Calibrated Enhanced-Resolution Passive Microwave Daily EASE-Grid 2.0 Brightness Temperature ESDR, Version 1 data set available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). Also, AMSR-E data are now available as v1.2. The minor changes include:

• Addition of missing input data for the first day of the month in the N and S projections
• Change of  the size of the time dimension from 1 to “UNLIMITED”
• Addition of files for dates with no data to match the convention already in use for all other sensors in the data record.

This data set is part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program.

Data Set DOI: http://dx.doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0630.001

The MEaSUREs Greenland Image Mosaics from Sentinel-1A and 1B, 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, part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, provides 6 and 12-day 50 m resolution image mosaics of the Greenland coastline and ice sheet periphery. The mosaics are derived from C-band Synthetic Aperture Radar (C-SAR) acquired by the Sentinel-1A and 1B imaging satellites, between January 2015 and April 2017.

Data Set DOI: http://dx.doi.org/10.5067/8LCCSFWL7L28

The MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from Optical Images, Version 2 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set, part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, consists of mean monthly velocity maps for selected glacier outlet areas. The maps are generated by tracking visible features between optical image pairs acquired by the Landsat 7 Enhanced Thematic Mapper Plus (ETM+), the Landsat 8 Operational Land Imager (OLI), and the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER). The Version 2 update expands the temporal coverage of the data set through September 2016, using cross-path Landsat pairs to fill in temporal gaps in the 2016 data. Version 2 also includes the application of a more aggressive filtering method, the correction of misnamed error values, and the addition of a west coast grid at 80.75 degrees north.

Data Set DOI: http://dx.doi.org/10.5067/VM5DZ20MYF5C

The MEaSUREs Annual Antarctic Ice Velocity Maps, 2005-2016 data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set, part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, provides 11 annual maps of Antarctic ice velocity from 2005-2016. The maps are assembled using ALOS PALSAR, ENVISAT ASAR, RADARSAT-1, RADARSAT-2, Sentinel-1, TerraSAR-X (TSX), TanDEM –X (TDX) SAR data, and Landsat-8 optical imagery acquired between 2005 and 2016.

Data Set DOI: http://dx.doi.org/10.5067/9T4EPQXTJYW9

The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has released Version 2 of MEaSUREs InSAR-Based Antarctica Ice Velocity Map. Major updates to the data set include data from 2011-2016 acquired from RADARSAT-2, Sentinel-1, TerraSAR-X, and TanDEM-X. Landsat-8 optical imagery also was integrated into the data to improve coverage. The mosaicking method was updated to make best use of the large number of scenes used for the mosaic. In addition, several new parameters are included for assessing the quality of the data: the standard deviation of vx and vy for each pixel and count of scenes used for each pixel. Coverage increased from 95.1% to 99.6% and a reduction in error was achieved due to the utilization of more data.

This project was funded by the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program.

Data Set DOI: http://dx.doi.org/10.5067/D7GK8F5J8M8R

Three data sets in the NASA’s Making Earth System Data Records for Use in Research Environments (MEaSUREs) program are now available in a new version from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). The new version, 1.1, corrects the location of the upper left pixel in each GeoTIFF file. The corrected location of the upper left pixel is the distance in meters from the north pole to the upper left corner of the upper left pixel, effectively shifting the location by one-half pixel to the upper left relative to their positions in the previous version. Only the geolocation metadata in each GeoTIFF has changed; the data array is the same as in the previous version.

To obtain these data, visit the following data set landing pages:

• MEaSUREs Greenland Ice Mapping Project (GIMP) Digital Elevation Model (doi: http://dx.doi.org/10.5067/NV34YUIXLP9W)
• MEaSUREs Greenland Ice Mapping Project (GIMP) 2000 Image Mosaic (doi: http://dx.doi.org/10.5067/4RNTRRE4JCYD)
• MEaSUREs Greenland Ice Mapping Project (GIMP) Land Ice and Ocean Classification Mask (doi: http://dx.doi.org/10.5067/B8X58MQBFUPA)

The MEaSUREs Greenland Ice Mapping Project (GIMP) Land Ice and Ocean Classification Mask data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set, part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, provides a complete land ice and ocean classification mask for the Greenland ice sheet that was mapped using a combination of Landsat 7 ETM+ panchromatic band imagery, and RADARSAT- 1 Synthetic Amplitude Radar (SAR) amplitude images.

Data Set DOI: http://dx.doi.org/10.5067/B8X58MQBFUPA

THE NSIDC Polaris Search and Order tool will be retired on 15 February 2017. Please contact NSIDC User Services via email: nsidc@nsidc.org with questions.

The CanSISE Observation-Based Ensemble of Northern Hemisphere Terrestrial Snow Water Equivalent data set, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been updated to Version 2.

Data Set DOI: http://dx.doi.org/10.5067/96ltniikJ7vd

The MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR data set at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been updated with velocity maps for 2015.

These data are generated through a grant from the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program.

Data Set DOI: http://dx.doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0481.001

The Multi-year Greenland Ice Sheet Velocity Mosaic data set is now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set, part of the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, contains a multi-year ice-sheet-wide velocity mosaic for Greenland derived from Interferometric Synthetic Aperture Radar (InSAR), Synthetic Aperture Radar (SAR), and Landsat 8 optical imagery data.

Data Set DOI: http://dx.doi.org/10.5067/QUA5Q9SVMSJG

The MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR data set at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been updated with velocity maps for 2013 and 2014. In addition, this update replaces all data for the Jakobshavn Isbrae, Helheim, and Kangerdlugssuaq glaciers with new maps that offer improved temporal sampling and address previous artifacts related to slope discontinuities at these glaciers’ terminii.

These data are generated through a grant from the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program.

Data Set DOI: http://dx.doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0481.001

The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) is pleased to announce a new data set, the MEaSUREs MODIS Mosaic of Greenland 2005 (MOG2005) Image Map. This data set consists of two digital image maps for Greenland that show surface morphology and snow grain size. The image maps are constructed from MODIS imagery acquired during 2005 and provide nearly cloud-free views of all land areas and islands larger than a few hundred meters, including the ice caps on Baffin Island, Devon Island, Axel Heiberg Island, and Ellesmere Island.

For more information, see MEaSUREs MODIS Mosaic of Greenland 2005 (MOG2005) Image Map (DOI: 10.5067/IAGYM8Q26QRE).

The Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), is pleased to announce the release of a new data set.  MEaSUREs Annual Greenland Outlet Glacier Terminus Positions from SAR Mosaics provides glacier terminus positions in individual shapefiles for winter 2000–2001, annually during winters 2005–2006 to 2008–2009, and winter 2012–2013.

Data Set DOI: http://dx.doi.org/10.5067/DC0MLBOCL3EL

The Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), is pleased to announce that six of its data sets can now be readily geolocated by popular geospatial software packages such as GDAL and Panoply. These updated data sets include two new variables that specify x and y coordinates for the projection in meters from the origin. To obtain these data, visit the following data set landing pages:

• MEaSUREs Northern Hemisphere Terrestrial Snow Cover Extent Daily 25km EASE-Grid 2.0 (DOI: http://dx.doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0530.001)
• MEaSUREs Northern Hemisphere Terrestrial Snow Cover Extent Weekly 100km EASE-Grid 2.0 (DOI: http://dx.doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0531.001)
• MEaSUREs Arctic Sea Ice Characterization Daily 25 km EASE-Grid 2.0 (DOI: http://dx.doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0532.001)
• MEaSUREs Greenland Surface Melt Daily 25km EASE-Grid 2.0 (DOI: http://dx.doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0533.001)
• MEaSUREs Northern Hemisphere State of Cryosphere Daily 25km EASE-Grid 2.0 (DOI: http://dx.doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0534.001)
• MEaSUREs Northern Hemisphere State of Cryosphere Weekly 100km EASE-Grid 2.0 (DOI: http://dx.doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0535.001)

The Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) is pleased to announce the release of a new data set, MEaSUREs Northern Hemisphere State of Cryosphere Daily 25km EASE-Grid 2.0. This data set reports the location of Northern Hemisphere snow cover and sea ice extent, the status of melt onset across Greenland and Arctic sea ice, and the level of agreement between three different snow cover data sources.

Data Set DOI: http://dx.doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0534.001

The MEaSUREs InSAR-Based Ice Velocity of the Amundsen Sea Embayment, Antarctica data set is now available from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, consists of high-resolution, digital mosaics of ice motion in the Amundsen Sea Embayment and West Antarctica, including Pine Island, Thwaites, Haynes, Pope, Smith, and Kohler glaciers. The mosaics were assembled from interferometric synthetic-aperture radar (InSAR) data acquired in 1996, 2000, 2002, and 2006-2012 by various satellites.

To view complete documentation and access the data, visit the data set Web page at http://nsidc.org/data/nsidc-0545.

The MEaSUREs Northern Hemisphere Terrestrial Snow Cover Extent Daily 25 km EASE-Grid 2.0 data set is now available from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

This data set offers users 25 km Northern Hemisphere snow cover extent represented by four different variables. Three of the snow cover variables are derived from the Interactive Multisensor Snow and Ice Mapping System, MODIS Cloud Gap Filled Snow Cover, and passive microwave brightness temperatures, respectively. The fourth variable merges the three source products into a single representation of snow cover.

DOI: 10.5067/MEASURES/CRYOSPHERE/nsidc-0530.001

The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has added new data for 2012 to the MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR data set. Part of NASA’s Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, these data now span January 2009 to December 2012.

Visit the MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR catalog page to view complete documentation and obtain the data.

From 4:30 p.m. Wednesday, June 04 until noon Friday, June 06  (USA Mountain Time), our Web site and FTP server will be unavailable due to system maintenance. We apologize for any inconvenience this may cause you.

NSIDC is receiving new data from MEaSUREs, NASA’s Making Earth System Data Records for Use in Research Environments Program. These offerings will expand NSIDC’s current MEaSUREs roster with new data sets related to snow, sea ice, Greenland surface melt, and more. See Current and upcoming MEaSUREs data at NSIDC for details.

NSIDC has published an update to the NASA MEaSUREs program data set MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR, supplying data for additional locations in Greenland. The data were produced from TerraSAR-X (TSX) image pairs collected from January to May 2009.

NSIDC has released MEaSUREs Global Record of Daily Landscape Freeze/Thaw Status, Version 01 (NSIDC-0477). This data set provides a global record of daily freeze/thaw status from 1988 to 2007. The data set is based on data from the Defense Meteorological Satellite Program (DMSP) Special Sensor Microwave/Imager (SSM/I).