Earth  ID: 3470

Comparison of Minimum Sea Ice Between 2005 and 2007 - Split Screen

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. The 2007 Arctic summer sea ice has reached the lowest extent of perennial ice cover on record - nearly 25% less than the previous low set in 2005. The area of the perennial ice has been steadily decreasing since the satellite record began in 1979, at a rate of about 10% per decade. But the 2007 minimum, reached on September 14, is far below the previous record made in 2005 and is about 38% lower than the climatological average. Such a dramatic loss has implications for ecology, climate and industry.

This animation compares the difference between the perennial sea ice minimum extent on September 21, 2005 and September 14, 2007. With a split screen, the area of the melted region is compared with the size of the state of California.
 

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Visualization Credits

Cindy Starr (GST): Lead Visualizer
Greg Shirah (NASA/GSFC): Animator
Josefino Comiso (NASA/GSFC): Scientist
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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http://svs.gsfc.nasa.gov/3470

Data Used:
DMSP/SSM/I 2005-09-21 and 2007-09-14
Comiso's September Minimum Sea Ice Concentration 2005-09-21 and 2007-09-14
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:
DLESE >> Cryology
SVS >> HDTV
GCMD >> Earth Science >> Cryosphere
GCMD >> Earth Science >> Cryosphere >> Sea Ice
GCMD >> Earth Science >> Cryosphere >> Snow/Ice
GCMD >> Earth Science >> Hydrosphere >> Snow/Ice
GCMD >> Earth Science >> Oceans >> Sea Ice
GCMD >> Earth Science >> Cryosphere >> Sea Ice >> Ice Extent
GCMD >> Earth Science >> Cryosphere >> Sea Ice >> Pack Ice
GCMD >> Earth Science >> Cryosphere >> Sea Ice >> Sea Ice Concentration
GCMD >> Earth Science >> Cryosphere >> Snow/Ice >> Freeze/Thaw
GCMD >> Earth Science >> Cryosphere >> Snow/Ice >> Ice Extent
GCMD >> Earth Science >> Cryosphere >> Snow/Ice >> Ice Growth/Melt
GCMD >> Earth Science >> Hydrosphere >> Snow/Ice >> Ice Extent
GCMD >> Earth Science >> Oceans >> Sea Ice >> Ice Extent
GCMD >> Earth Science >> Oceans >> Sea Ice >> Ice Growth/Melt
GCMD >> Earth Science >> Oceans >> Sea Ice >> Pack Ice
SVS >> iPod
NASA Science >> Earth

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