Earth  ID: 3445

Sea Ice Minimum Concentration 3-year moving averages for 1979-1981 to 2004-2006

There is a newer version of this story located here:
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. This animation shows a 3-year moving average of the perennial ice cover, or minimum sea ice concentration, for from 1979-1981 through 2004-2006. 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. This decrease is evident in the animation shown here.

This is an update of animation ID #3267.

Newer Version

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

Short URL to share this page:

Tropical Rainfall Measuring Mission - TRMM

Data Used:
Comiso's September Minimum Sea Ice Concentration
Data Compilation - NASA/GSFC
Nimbus-7/SSMR/September Sea Ice Concentration Anomaly
September 2003
Defense Meteorological Satellite Program Special Sensor Microwave Imager
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.

Dates of Data Used:

DLESE >> Cryology
GCMD >> Earth Science >> Cryosphere
GCMD >> Earth Science >> Cryosphere >> Sea Ice
GCMD >> Earth Science >> Oceans >> Sea Ice
GCMD >> Earth Science >> Cryosphere >> Sea Ice >> Ice Extent
GCMD >> Earth Science >> Cryosphere >> Sea Ice >> Sea Ice Concentration
GCMD >> Earth Science >> Cryosphere >> Snow/Ice >> Ice Extent
GCMD >> Earth Science >> Oceans >> Sea Ice >> Ice Extent
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