LiveScience: The summer melt season for Arctic sea ice has lengthened by a month or more since 1979, a new study finds.
The primary culprit is a delayed fall freeze-up -- the autumn chill when sea water freezes into ice -- but the fallout remains the same: the Arctic ice cap is stuck in a vicious feedback loop betwixt its warming environment and melting ice, researchers reported Feb. 4 in the journal Geophysical Research Letters.
The Arctic is one of the fastest warming places on Earth. Temperatures here...