Thursday, October 15, 2009

Arctic Sea Ice Decline Details

This article in the Oct 15 TimesOnline provides many interesting details about the trends and implications in the loss of Arctic sea ice. The loss has been measured not only in extent by satellite, but also in average thickness by hands-on measurements:

"Mr Hadow and his two team members spent 73 days between March 1 and May 7 this year walking 280 miles (450.6km) across the Arctic while taking measurements. They drilled 1,500 holes and found that the average thickness of ice floes was 1.8m (5.9ft)."

For an answer to - Why was sea ice extent in 2009 only the 3rd lowest ? - see this NSIDC press release which contains the following quote: "The cooler conditions, which resulted largely from cloudy skies during late summer, slowed ice loss compared to the past two years (Figure 4). In addition, atmospheric patterns in August and September helped to spread out the ice pack, keeping extent higher. "

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