This study compares the boreal summer monsoon （BSM） precipitation between the GPCP and CMAP products during 1979-2014. The authors apply temporal, spatial correlation and error evaluation methods to evaluate their d...This study compares the boreal summer monsoon （BSM） precipitation between the GPCP and CMAP products during 1979-2014. The authors apply temporal, spatial correlation and error evaluation methods to evaluate their discrepancies in terms of BSM distribution and summer rainfall interannual variability over the five BSM regions. The results suggest that the climatology of the seasonal evolution of BSM rainfall is reflected well in both datasets, and the summer rainfall anomalies of the two products are highly correlated. However, major diversity is found in the rainfall pattern and the magnitude in climatology over the oceanic monsoon areas, especially the western North Pacific monsoon region, as well as in the interannual variability of summer rainfall anomalies over the North Africa and India monsoon regions. Although inconsistency between the two datasets is evident before the 1990s, the use of their arithmetic mean is demonstrated to be an efficient way to reduce the uncertainty between them.展开更多
基金jointly supported by the National Natural Science Foundation of China[grant number 41475057],[grant number 41221064],[grant number 91437218],[grant number41505049]the Key Program of Chinese Academy of Meteorological Sciences[grant number 2015Z001]
文摘This study compares the boreal summer monsoon （BSM） precipitation between the GPCP and CMAP products during 1979-2014. The authors apply temporal, spatial correlation and error evaluation methods to evaluate their discrepancies in terms of BSM distribution and summer rainfall interannual variability over the five BSM regions. The results suggest that the climatology of the seasonal evolution of BSM rainfall is reflected well in both datasets, and the summer rainfall anomalies of the two products are highly correlated. However, major diversity is found in the rainfall pattern and the magnitude in climatology over the oceanic monsoon areas, especially the western North Pacific monsoon region, as well as in the interannual variability of summer rainfall anomalies over the North Africa and India monsoon regions. Although inconsistency between the two datasets is evident before the 1990s, the use of their arithmetic mean is demonstrated to be an efficient way to reduce the uncertainty between them.
