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Multi-satellite observed responses of precipitation and its extremes to3 interannual climate variability4
 

Summary: 1
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Multi-satellite observed responses of precipitation and its extremes to3
interannual climate variability4
Chunlei Liu and Richard P. Allan5
Department of Meteorology, University of Reading, Reading, UK6
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ABSTRACT8
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The consistency of precipitation variability estimated from the multiple satellite-based observing10
systems is assessed. There is generally good agreement between datasets for the inter-annual variability of11
precipitation since 1997. Based upon deseasonalised GPCP data for the period 1998-2008, the sensitivity12
of global mean precipitation (P) to surface temperature (T) changes (dP/dT) is about 6%/K, although a13
smaller sensitivity of 3.6%/K is found using monthly GPCP data over the longer period 1989-2008. Over14
the tropical oceans dP/dT ranges from 10-30%/K depending upon time-period and dataset while over tropical land15
dP/dT is 8 to 11%/K for the 1998-2008 period.16
Analyzing the response of the tropical ocean precipitation intensity distribution to changes in T we find the17
wetter area P shows a strong positive response to T of around 20%/K. The response over the drier tropical18
regimes is less coherent and varies with datasets, but responses over the tropical land show significant19

  

Source: Allan, Richard P. - Department of Meteorology, University of Reading

 

Collections: Geosciences