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Science. 2008 Sep 12;321(5895):1481-4. doi: 10.1126/science.1160787. Epub 2008 Aug 7.

Atmospheric warming and the amplification of precipitation extremes.

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1
Environmental Systems Science Centre, University of Reading, Berkshire RG6 6AL, UK. r.p.allan@reading.ac.uk

Abstract

Climate models suggest that extreme precipitation events will become more common in an anthropogenically warmed climate. However, observational limitations have hindered a direct evaluation of model-projected changes in extreme precipitation. We used satellite observations and model simulations to examine the response of tropical precipitation events to naturally driven changes in surface temperature and atmospheric moisture content. These observations reveal a distinct link between rainfall extremes and temperature, with heavy rain events increasing during warm periods and decreasing during cold periods. Furthermore, the observed amplification of rainfall extremes is found to be larger than that predicted by models, implying that projections of future changes in rainfall extremes in response to anthropogenic global warming may be underestimated.

PMID:
18687921
DOI:
10.1126/science.1160787
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