Arctic sea ice is in trouble
attacked crucial Arctic sea ice thickness in two sudden big gobbles instead of steady nibbling, a new study says.quickly lost more than half its thickness, becoming weaker, more prone to melting and less likely to recover, according to the study that emphasizes the importance of two big"regime shifts" that changed the complexion of the Arctic.
He found that first ice was getting younger, which made it thinner and more uniform, and easier to push out through the Fram Strait. Thicker ice has all sorts of edges and weird shapes that make it harder to force out of the Arctic because of aerodynamics, but that's not the case for sleeker, younger ice, Sumata said.
What likely happened in 2005 and 2007 were periods with warm, large, ice-free open water in the Arctic that exceeded periods of previous summers, Sumata said. White ice reflects the sun's rays, but the dark ocean absorbs it and warms up — something called ice albedo feedback. This cycle of warmer water made it harder for ice to form, survive and get thicker, he said.
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