Scientists
Research Grants
Scientific Publications
Informatics Research
NSIDC Scientific Expeditions
Scientists blog from Antarctica and provide a glimpse of what it's like to do research in the field. 
What's hot in the news around climate and sea ice and what are scientists talking about now? 
Data Announcements
MEaSUREs Releases Multi-year Greenland Ice Sheet Velocity Mosaic
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
New Data added to MEaSUREs Canadian Meteorological Centre (CMC) Daily Snow Depth Analysis Data
The MEaSUREs Canadian Meteorological Centre (CMC) Daily Snow Depth Analysis Data data set at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been updated with snow depth analysis data 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/W9FOYWH0EQZ3.001.
New Data added to MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR
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
MEaSUREs Greenland Ice Sheet Velocity Map from InSAR Data, Version 2 Released
The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has released Version 2 of MEaSUREs Greenland Ice Sheet Velocity Map from InSAR Data. This update offers users a new winter velocity map for 2009/2010 plus processing enhancements that include:
- Additional quality control screening to remove bad data points;
- Improved baseline fits that enhance consistency in the interior;
- Updated error estimates that better represent the average behavior of the data;
- The addition of ALOS fine-beam data to improve coverage
MODIS Mosaic of Greenland 2005 Now Available
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).
Greenland Ice Mapping Project Digital Elevation Model Now Available
The Greenland Ice Mapping Project (GIMP) Digital Elevation Model is now available from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). This data set, funded by NASA’s Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program, consists of an enhanced resolution digital elevation model (DEM) for the Greenland Ice Sheet. The DEM was constructed by combining ASTER and SPOT 5 DEMs over the ice sheet periphery and margin with AVHRR photoclinometry for the interior and far north, and calibrating the data to mean elevations obtained by the Geoscience Laser Altimeter System (GLAS) that flew on the Ice, Cloud, and land Elevation (ICESat) satellite.
For more information and to obtain the DEM, visit MEaSURES Greenland Ice Mapping Project (GIMP) Digital Elevation Model (DOI: 10.5194/tc-8-1509-2014).
MEaSUREs Releases Annual Greenland Outlet Glacier Terminus Positions from SAR Mosaics
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
MEaSUREs Releases New High-Resolution Greenland SAR Mosaics
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 Greenland Ice Sheet Mosaics from SAR Data consists of the following high-resolution mosaics derived from synthetic aperture radar (SAR): uncalibrated and sigma naught calibrated C-band mosaics from RADARSAT-1 for the winters of 2000–2001, 2005–2006 through 2008–2009, and 2012–2013; and uncalibrated ALOS Phased Array type L-band Synthetic Aperture Radar (PALSAR) mosaics for the winter of 2009–2010. In addition, a RADARSAT-1 multiyear composite is available for 2000-2009. All mosaics are provided at both 100 m and 20 m resolutions.
Data Set DOI: http://dx.doi.org/10.5067/6187DQUL3FR5
Six MEaSUREs Data Sets Re-released with New Coordinate Variables
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)
MEaSUREs Releases 100 km Weekly State of the Cryosphere Data Set
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 Weekly 100km 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 snow cover maps derived from two different sources.
Data Set DOI: http://dx.doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0535.001
MEaSUREs Releases Daily State of the Cryosphere Data Set
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
MEaSUREs Releases Weekly 100 km N. Hemisphere Snow Cover Data
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 Terrestrial Snow Cover Extent Weekly 100km EASE-Grid 2.0. This data set offers users weekly 100 km snow cover maps for the Northern Hemisphere, derived from the NOAA/NCDC Northern Hemisphere Snow Cover Extent Climate Data Record and satellite passive microwave brightness temperatures.
Data Set DOI: http://dx.doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0531.001
New InSAR Ice Velocity Data for Antarctica
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.
Data Acknowledgements Data authors: E. Rignot, J. Mouginot, and B. Scheuchl. Data center: NSIDC DAAC (http://nsidc.org/daac) Sponsor: NASA EOSDIS (http://earthdata.nasa.gov) Data Set DOI: http://dx.doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0545.001New Greenland Surface Melt Data from NASA MEaSUREs
The MEaSUREs Greenland Surface Melt Daily 25km 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, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program, offers users a 25 km daily record of surface/near-surface melting on the Greenland Ice Sheet from 2 January 1979 to 31 December 2012.
To access the data and documentation, visit the data set Web page at http://nsidc.org/data/nsidc-0533.
Data Set DOI: http://dx.doi.org/10.5067/MEASURES/CRYOSPHERE/nsidc-0533.001
