Earth  ID: 4328

Greenland's Glaciers as seen by RadarSat

This animation is based on 30-meter topography data for Greenland along with an ocean and an ice sheet mask provided by the Greenland Ice Mapping Project (GIMP) at Ohio State. Each of these datasets consists of a 6 x 6 array of 124 megapixel tiles.

The surface texture is derived from seven sets of 20-meter Radarsat reflectance data from the Canadian Space Agency, mosaicked at the University of Washington's Applied Physics Lab and accurately registered to the topography data. Each of six tile sets represents data for one year between 2000 and 2013, while the final one is a composite of the six years that has most areas of missing data resolved. Each of these tile sets consist of a 5 x 5 array of 421 megapixel tiles.

The false color of the surface is derived as follows. Three different color scales are applied to the floating point Radarsat reflectance data based on their relationship within the GIMP masks. Areas within the ice sheet mask are mapped to a color ramp from white (high) to grey (low). Areas within the land region of the ocean mask but not in the ice sheet mask are similarly mapped to a color ramp of light to dark tan. The area indicating ocean is mapped to blue.
 

Used Elsewhere In


Related


Visualization Credits

Cindy Starr (GST): Lead Visualizer
Greg Shirah (NASA/GSFC): Visualizer
Ian Howat (Ohio State University): Scientist
Ian Joughin (Polar Science Center, University of Washington): Scientist
Twila Moon (National Snow & Ice Data Center, CIRES, University of Colorado, Boulder): Scientist
Jefferson Beck (USRA): Producer
Please give credit for this item to:
NASA's Scientific Visualization Studio

Radarsat data courtesy of the Canadian Space Agency, mosaicked by Ian Joughin, Applied Physics Laboratory, University of Washington

GIMP Topography and Ice/Land/Water mask courtesy of the BPRC Glacier Dynamics Research Group, Ohio State University

The Blue Marble data is courtesy of Reto Stockli (NASA/GSFC).

Additional credit goes to Canadian Space Agency, RADARSAT International Inc.

Short URL to share this page:
http://svs.gsfc.nasa.gov/4328

Data Used:
Greenland Mapping Project (GIMP) Digital Elevation Model 2003 - 2009
RADARSAT-1/SAR 2000 - 2013
Note: While we identify the data sets used in these visualizations, we do not store any further details nor the data sets themselves on our site.

Keywords:
SVS >> HDTV
GCMD >> Earth Science >> Cryosphere >> Glaciers/Ice Sheets >> Ice Sheets
GCMD >> Earth Science >> Hydrosphere >> Glaciers/Ice Sheets >> Ice Sheets
GCMD >> Location >> Greenland
SVS >> Hyperwall
NASA Science >> Earth
GCMD >> Earth Science >> Terrestrial Hydrosphere >> Glaciers/Ice Sheets >> Ice Sheets
NASA Earth Science Focus Areas >> Climate Variability and Change

GCMD keywords can be found on the Internet with the following citation: Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 8.0.0.0.0