The village of Qannaaq, Greenland,
21 September 2015

Greenhouse gas emissions from thawing Arctic permafrost could result in an additional $43 trillion in economic impacts by the end of the twenty-second century, according to a new study by researchers from the University of Cambridge and the National Snow and Ice Data Center (NSIDC). 

This image shows a NASA Blue Marble view of the Arctic on September 11, 2015 when sea ice extent was at 4.41 million square kilometers (1.70 million square miles).
15 September 2015

Arctic sea ice extent appears to have reached its minimum extent on September 11, 2015, measured at 4.41 million square kilometers (1.70 million square miles).

Arctic sea ice extent for February 25, 2015
19 March 2015

Arctic sea ice extent reached its maximum on February 25, 2015 at 14.54 million square kilometers (5.61 million square miles). 

Sensing Our Planet 2014
22 December 2014

Sensing Our Planet 2014 is out and now available in iBooks.