Start Date: End Date: Published Date Data Date
Oldest Arctic Sea Ice is Disappearing
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Published March 1, 2012
Thick ice that used to last through multiple summers has been in steep decline for three decades.
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2011 Greenland Melt Season
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Published December 6, 2011
The 2011 Greenland melt season was up to 30 days longer than the 1979–2010 average. This color-coded map shows where melt season lasted more or less than average.
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Arctic Sea Ice
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Published May 3, 2011
Sea ice naturally grows and melts each year, but the process has been more extreme in recent years.
Record Melting in Greenland during 2010
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Published February 18, 2011
The ice-covered island’s melt season lasted 50 days longer than average.
Melt Season in the Arctic Getting Longer
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Published January 29, 2010
Satellite data revealed changes in the average start of spring melting and the first autumn freeze.
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Melting on the Greenland Ice Cap, 2008
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Published February 25, 2009
The northern fringes of Greenland's ice sheet saw extreme melting in 2008, according to NASA scientist Marco Tedesco and his colleagues.
Arctic Sea Ice Younger than Normal
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Published March 25, 2008
In the Arctic, sea ice extent fluctuates with the seasons. It reaches its peak extent in March, near the end of Northern Hemisphere winter, and its minimum extent in September, at the end of the summer thaw. In September 2007, Arctic sea ice extent was the smallest area on record since satellites began collecting measurements about 30 years ago.
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