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Climatology Comparison Studies of Precipitations Between GPCP and Rain Gauges in China
作者姓名:ZI Yong  XU Yinlong  FU Yunfei
作者单位:School of Earth and Space Sciences University of Sciences and Technology of China,School of Earth and Space Sciences University of Sciences and Technology of China,School of Earth and Space Sciences University of Sciences and Technology of China Hefei 230026,Hefei 230026,Hefei 230026
摘    要:The Global Precipitation Climatology Project (GPCP) monthly rainfall data and the rainfall records observed by 740 rain gauges in the mainland of China are used to analyze similarities and differences of the precipitation in China in the period from January 1980 to December 2000. Results expose significantly consistent rainfall distributions between the both data in multi-year mean, multi-year seasonal mean, and multi-year monthly mean. Departures of monthly rainfall for each dataset also show a high correlation with an over 0.8 correlation coefficient. Analysis indicates small differences of both datasets during autumn, winter, and spring, but relative large ones in summer. Generally, the GPCP has trend of overestimating the rainfall rate. Based on above good relationship of both datasets, the GPCP data are used to represent distributions and variations of precipitation in the Tibetan Plateau and Northwest China. Results indicate positive departures of precipitation in summer in the west part of Tibetan Plateau in the 1980s and negative departures after the 1980s. For the west part of Northwest China, analysis illustrates precipitation decreases a little, but no clear variation tendency.

关 键 词:降雨量  雨量测量器  GPCP  水循环
收稿时间:2004/10/18 0:00:00
修稿时间:2005/9/13 0:00:00

Climatology Comparison Studies of Precipitations Between GPCP and Rain Gauges in China
ZI Yong,XU Yinlong,FU Yunfei.Climatology Comparison Studies of Precipitations Between GPCP and Rain Gauges in China[J].Acta Meteorologica Sinica,2006,20(3):322-333.
Authors:ZI Yong  XU Yinlong  FU Yunfei
Institution:School of Earth and Space Sciences, University of Sciences and Technology of China, Hefei 230026
Abstract:The Global Precipitation Climatology Project (GPCP) monthly rainfall data and the rainfall records observed by 740 rain gauges in the mainland of China are used to analyze similarities and differences of the precipitation in China in the period from January 1980 to December 2000. Results expose significantly consistent rainfall distributions between the both data in multi-year mean, multi-year seasonal mean, and multi-year monthly mean. Departures of monthly rainfall for each dataset also show a high correlation with an over 0.8 correlation coefficient. Analysis indicates small differences of both datasets during autumn, winter, and spring, but relative large ones in summer. Generally, the GPCP has trend of overestimating the rainfall rate. Based on above good relationship of both datasets, the GPCP data are used to represent distributions and variations of precipitation in the Tibetan Plateau and Northwest China. Results indicate positive departures of precipitation in summer in the west part of Tibetan Plateau in the 1980s and negative departures after the 1980s. For the west part of Northwest China, analysis illustrates precipitation decreases a little, but no clear variation tendency.
Keywords:China precipitation  Global Precipitation Climatology Project (GPCP)  rain gauges
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