Reconstructed index of summer monsoon dry-wet modes in East Asia for the last millennium  

作　　者：QIAN WeiHong ZHU YaFen TANG ShuaiQi 

机构地区：[1]Monsoon and Environment Research Group, School of Physics, Peking University, Beijing 100871, China

出　　处：《Chinese Science Bulletin》2011年第28期3019-3027,共9页

基　　金：the National Natural Science Foundation of China (40890053 and 90711003);the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA0509400)

摘　　要：Monthly precipitation datasets collected at 160 stations in China as well as the monthly winds and humidity data derived from the US National Centers for Environmental Prediction (NCEP) were used to construct the relationship between six summer dry-wet modes in eastern China and the summer monsoon airflow northward advance in East Asia. A millennial series of the monsoon dry-wet index (MDWI) was reconstructed based on Wang's six summer dry-wet modes in eastern China since 950 AD. A high (low) index indicates that the strong (weak) East Asian summer monsoon airflow can reach northern (southern) China and cause above (below) normal precipitation. Interdecadal periodic variations, such as the approximate 70-year oscillation, can be found in the MDWI series. In the last millennium, northern China has experienced persistent decadal wet periods and persistent decadal dry periods. At present, the MDWI is a low period on the interdecadal time scale so above-normal precipitation is observed in southern China and below-normal precipitation in northern China.Monthly precipitation datasets collected at 160 stations in China as well as the monthly winds and humidity data derived from the US National Centers for Environmental Prediction （NCEP） were used to construct the relationship between six summer dry-wet modes in eastem China and the summer monsoon airflow northward advance in East Asia. A millennial series of the monsoon dry-wet index （MDWI） was reconstructed based on Wang＇s six summer dry-wet modes in eastern China since 950 AD. A high （low） index indicates that the strong （weak） East Asian summer monsoon airflow can reach northern （southem） China and cause above （below） normal precipitation. Interdecadal periodic variations, such as the approximate 70-year oscillation, can be found in the MDWI series. In the last millennium, northern China has experienced persistent decadal wet periods and persistent decadal dry periods. At present, the MDWI is a low period on the interdecadal time scale so above-normal precipitation is observed in southem China and below-normal precipitation in northern China.

关 键 词：夏季季风 干湿指数 东亚 中国北方地区 月降水量 中国模式 重构 中国东部地区 

分 类 号：P434.5[天文地球—大气科学及气象学] S423[农业科学—植物保护]