Temperatures of +21C above normal in Dec/Jan in the eastern Arctic. Parts of Hudson Bay remain unfrozen

This NASA image shows average Arctic sea ice concentration for January 2011. Blue indicates open water; white indicates high sea ice concentrations; and turquoise indicates loosely packed sea ice. The yellow line shows the average sea ice extent for January from 1979 through 2000.

The U.S. National Snow and Ice Data Center (NSIDC) has reported that Arctic sea ice was at its lowest extent ever recorded for January (since satellite records began).

I’ve written about why this is happening and the consequences several times in recent weeks — Stephen

Arctic Defrost Dumping Snow on U.S. and Europe

Arctic Melt Down Is Bringing Harder Winters and Permanently Altering Weather Patterns

East Coast Blizzard and Europe’s Snowmaggddon Reveal Fingerprints of Climate Change