Sea Ice Update
Posted by Jeff Condon on September 21, 2009
Arctic sea ice crossed over and exceeded the 2005 level on Sept 20.
Sea ice extent is plotted using AMSR-E data at the IJIS website with the following values.
2009 5383594 km^2 and 2005 was 5345156.
Sea ice has officially reached its minimum in the Arctic continuing its recovery from the 2007 minimum. In the Antarctic the ice levels continue to grow. I’ve calculated the ice area anomalies (not extent) from the raw NSIDC data myself here. This data is slightly different from my previous work as the NSIDC has updated 2008 to use the NOAA17 data instead of the failed 15 and 13 satellites.
And of course my favorite, global sea ice offset to show the actual size of the melting in relation to the average sea ice on earth. Tamino’s crowd loves this one. My average area is slightly low as the Arctic satellite hole is not added in.
Since they also love to criticize me for even showing global sea ice, HERE is a link to the Cryosphere graph where the pro’s also calculate the global sea ice anomaly with very similar results.