东亚季风区夏季风强度和降水的配置关系  

The Configurable Relationships between Summer Monsoon and Precipitation over East Asia

作　　者：刘长征[1] 王会军[1] 姜大膀[1] 

机构地区：[1]中国科学院大气物理研究所竺可桢-南森国际研究中心,北京100029

出　　处：《大气科学》2004年第5期700-712,共13页Chinese Journal of Atmospheric Sciences

基　　金：国家自然科学基金资助项目 40 1 2 5 0 1 4和 40 2 2 1 5 0 3共同资助

摘　　要：1979～ 2 0 0 0年东亚地区夏季风强度和夏季总降水之间的关系被分为四种类型 :A :强季风、强降水 ;B :强季风、弱降水 ;C :弱季风、强降水 ;D :弱季风、弱降水。通过研究不同关系对应的大气环流特征和SST异常 ,并分析不同要素在季风和降水关系变化中的作用 ,发现在季尺度上东亚季风区夏季风强度和地区同期降雨总量的关系具有多面性特征 ,此关系取决于环流场的整体配置 ,其中西太平洋副高、南亚高压和中高纬阻塞形式为三个起主导作用的因素。另外 ,海温变化对东亚季风和总降水的关系有明显的影响 ,尤其是北太平洋、印度洋和南海区域海温。合成分析结果表明 5 0 0hPa东亚异常波列和东亚夏季风强度密切相关 ,但波形与东亚季风区夏季总降水强弱没有明显联系。The relationships between the summer monsoon intensity and total summer precipitation over East Asia are analyzed and found to be in a complex way. 1979-2000 are divided into four types: A, strong monsoon with strong precipitation; B, strong monsoon with weak precipitation; C, weak monsoon with strong precipitation; D, weak monsoon with weak precipitation. All of the four types show big possibility. The atmospheric and oceanic anomalies of each monsoon year type are analyzed and their characteristic anomalies are found. The relationships between monsoon and precipitation rely on the overall circulation conditions, especially on the three factors of the western Pacific subtropical high, South Asia high, and the blocking highs in the middle-high latitudes. And SSTA leads an active influence, especially over the North Pacific, the South China Sea and the Indian Ocean. What’s more, it's found that the East Asia Anomaly Pattern is connected with the intensity of East Asian summer monsoon, while not with the total summer precipitation over East Asia.

关 键 词：东亚季风 夏季风 降水 强度 

分 类 号：P425.42[天文地球—大气科学及气象学] P461