Why climate models underestimated Arctic sea ice retreat: No Arctic sea ice in summer by end of century?
"results from the new model suggested that there will be
no artic sea ice in summer by the end of the century"
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Review
As with any popularization of a scientific paper, this must be approached with caution; a good paper always has to address the evidence against its findings, which never appear in the newspaper articles, which invariably deal in blacks and whites. That said, this article is better than most, giving some background; as would presumably be expected from Science Daily, rather than the National Enquirer.
This article does point out what few AGW opponents seem to understand; the bias in scientific publication towards conservatism in predictions. Thus this is one of many current papers which demonstrate newly discovered influences and/or positive feedback loops which will exacerbate global warming; and though there will be mitigating factors reported as well, the safe bet is that the majority of future papers on the subject will be in the nature of higher estimates.