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Regime dependent changes in global precipitation Richard P. Allan
 

Summary: Regime dependent changes in global precipitation
Richard P. Allan
Received: 19 April 2011 / Accepted: 20 June 2011
Springer-Verlag 2011
Abstract Assessment of changes in precipitation (P) as a
function of percentiles of surface temperature (T) and 500
hPa vertical velocity (x) are presented, considering pres-
ent-day simulations and observational estimates from the
Global Precipitation Climatology Project (GPCP) com-
bined with the European Centre for Medium-range
Weather Forecasts Interim reanalysis (ERA Interim). There
is a tendency for models to overestimate P in the warm,
subsiding regimes compared to GPCP, in some cases by
more than 100%, while many models underestimate P in
the moderate temperature regimes. Considering climate
change projections between 19801999 and 20802099,
responses in P are characterised by dP/dT C 4%/K over
the coldest 1020% of land points and over warm,
ascending ocean points while P declines over the warmest,
descending regimes (dP/dT * - 4%/K for model ensem-

  

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

 

Collections: Geosciences