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Updated 12 October, 2003

US National Assessment of
the Potential Consequences
of Climate Variability and Change
Intermodel Comparison of Precipitation

 

 

 

Figure 7: Comparison of the annual average changes in (a) global average precipitation (inches per month), and (b) average precipitation over the US from the Canadian Model Scenario (black) and Hadley Model Scenario (red) simulations used in the National Assessment and from the simulations of other groups (same as for Figure 6). The baseline period is assumed to be 1961-90. Although decadal means have been applied to suppress year-to-year fluctuations, the greater variability of precipitation than temperature still reveals significant variations due to natural factors; the magnitude, although not the timing, of the remaining fluctuations may be considered plausible.  The anomalies are with respect to the year 2000, calculating the values from a 2nd order polynomial fit.
 
 

global precipitation intercomparisonglobal precipitation intercomparison
   
 
 
 


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