An interesting corollary to this is that when the Arctic ocean becomes ice free, it becomes a giant solar collector. If warm rising air over the ocean couples with katibatic winds down the flanks of Greenland, we get highly accelerated melting of the ice sheet. By by New York.
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.