Released on October 24, 2011
Sea ice is frozen seawater floating on the surface of the ocean. Some sea ice is semi-permanent, persisting from year to year, and some is seasonal, melting and refreezing from season to season. The sea ice cover reaches its minimum extent at the end of each summer and the remaining ice is called the perennial ice cover.
In this animation, the Antarctic sea ice progresses through time from May 26, 2009 through July 31, 2010. Over the water, Arctic sea ice changes from day to day showing a running 3-day average sea ice concentration in the region where the concentration is greater than 15%. The blueish white color of the sea ice is derived from a 3-day running minimum of the AMSR-E 89 GHz brightness temperature. Over the Antarctic continent, the LIMA data shown here uses the pan-chromatic band and has a resolution of 240 meters per pixel. The Landsat Image Mosaic of Antarctica (LIMA) is a data product funded by the National Science Foundation (NSF) and jointly produced by the U.S. Geological Survey (USGS), the British Antarctic Survey (BAS), and the National Aeronautics and Space Administration (NASA).
Please give credit for this item to:
NASA/Goddard Space Flight Center Scientific Visualization Studio.
The Blue Marble data is courtesy of Reto Stockli (NASA/GSFC).
LIMA Data provided by: Patricia Vornberger (SAIC) LIMA data produced by U.S. Geological Survey (USGS), the British Antarctic Survey (BAS) and NASA
Short URL to share this page: http://svs.gsfc.nasa.gov/3854
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 126.96.36.199.0