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  • Allan, R.P., B.J. Soden, V.O. John, W. Ingram and P.Good, 2010: Current changes in tropical precipitation. Environmental Research Letters, 5, 025205, doi:10.1088/1748-9326/5/2/025205.

Current changes in tropical precipitation from satellite data and climate models are assessed. Wet and dry regions of the tropics are defined as the highest 30% and lowest 70% of monthly precipitation values. Observed tropical ocean trends in the wet regime (1.8%/decade) and the dry regions (-2.6%/decade) according to the Global Precipitation Climatology Project (GPCP) over the period including Special Sensor Microwave Imager (SSM/I) data (1988­-2008), where
GPCP is believed to be more reliable, are of smaller magnitude than when including the entire time series (1979­-2008) and closer to model simulations than previous comparisons. Analysing changes in extreme precipitation using daily data within the wet regions, an increase in the frequency of the heaviest 6% of events with warming for the SSM/I observations and model ensemble mean is identified. The SSM/I data indicate an increased frequency of the heaviest
events with warming, several times larger than the expected Clausius­Clapeyron scaling and at the upper limit of the substantial range in responses in the model simulations.

Full Article: http://iopscience.iop.org/1748-9326/5/2/025205

Last Updated: 2010-12-13

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