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member since 2007-07-24
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Arctic shrinkage is the marked decrease in Arctic sea ice and the observed melting of the Greenland Ice Sheet in recent years. Computer models predict that the sea ice area will continue to shrink in the future, though there is no consensus on when the Arctic Ocean might become ice-free in summer; one study states this might happen before 2015, while a more common theory estimates between 2040 and 2100.
Greenland's ice sheet contains enough fresh water as ice to raise sea level worldwide by 7 metres (23 ft). Models predict a sea-level contribution of about 5 centimetres (2 in) from melting in Greenland during the 21st century. It is also predicted that Greenland will become warm enough by 2100 to begin an almost complete melt during the next 1,000 years or more. Sea ice loss could cause more rapid warming of Northern latitudes, with effects on permafrost, methane release, and wildlife.
I guess now is still a early warning.