| Literature DB >> 16179434 |
F S Chapin1, M Sturm, M C Serreze, J P McFadden, J R Key, A H Lloyd, A D McGuire, T S Rupp, A H Lynch, J P Schimel, J Beringer, W L Chapman, H E Epstein, E S Euskirchen, L D Hinzman, G Jia, C-L Ping, K D Tape, C D C Thompson, D A Walker, J M Welker.
Abstract
A major challenge in predicting Earth's future climate state is to understand feedbacks that alter greenhouse-gas forcing. Here we synthesize field data from arctic Alaska, showing that terrestrial changes in summer albedo contribute substantially to recent high-latitude warming trends. Pronounced terrestrial summer warming in arctic Alaska correlates with a lengthening of the snow-free season that has increased atmospheric heating locally by about 3 watts per square meter per decade (similar in magnitude to the regional heating expected over multiple decades from a doubling of atmospheric CO2). The continuation of current trends in shrub and tree expansion could further amplify this atmospheric heating by two to seven times.Entities:
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Year: 2005 PMID： 16179434 DOI： 10.1126/science.1117368
Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728