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 Arctic sea ice and seasonal land cover change progress through time, from March 31, 2010 when sea ice in the Arctic was at its maximum extent, through September 19, 2010, when it was at its minimum. The blueish white color of the sea ice is derived from a 3-day running maximum of the AMSR-E 89 GHz brightness temperature. Over the terrain, monthly data from the seasonal Blue Marble Next Generation fades slowly from month to month.
Trent L. Schindler (UMBC): Lead Animator Cindy Starr (GST): Animator Helen-Nicole Kostis (UMBC): Animator Laura Motel (UMBC): Video Editor Rich Melnick (HTSI): Video Editor Michelle Williams (UMBC): Producer Josefino Comiso (NASA/GSFC): Scientist James W. Williams (GST): Project Support Shiloh Heurich (GST): Project Support Kathryn Hansen (Wyle Information Systems): Writer
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).
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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 188.8.131.52.0