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Tipping Point, After Tipping Point…
Another disturbing milestone was passed on November 6. The NSIDC graph below shows that although extent of the Arctic sea ice this past summer was greater than that of 2007, it is now less - a record low for its date. Ice covered the Arctic Ocean in a smaller area on November 6, 2009 than in any other year on November 6 since observations began in 1979.
This graph only shows sea ice extent, or the visible surface of the ice. It does not measure all-important data on the thickness, or mass of the ice, which is decreasing at an alarming rate.
Perhaps very suddenly, and very soon, all the Arctic summer sea ice will be gone.
