中国东部旱涝与东亚“纬向驻波”环流型相关关系的数值试验
投稿时间:1990-11-26    点此下载全文
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作者单位
徐祥德 天津市气象局 
尹树新 南京气象学院 
沈建国 南京气象学院 
吴效华 南京气象学院 
中文摘要:亚洲是世界著名的季风区,我国降水分布特征与东亚行星尺度环流型背景以及大地形结构有密切关系。本文采用p-σ坐标原始方程模式,着眼于西太平洋副热带高压与大陆热低压系统强度及其相互配置关系,即相应于东亚夏季风不同强度,与东亚海陆热状况密切相关的“纬向驻波”特征,研究夏季风流型与中国东部降水分布的相关。本文数值试验研究了东亚夏季风基本气流汇合特征与海陆纬向驻波环流型的相关;夏季暖湿区分布,暖湿舌形成与中国东部降水关系。还研究了我国东部雨带形成的高、低层流场的动力结构以及南亚高压活动特点。
中文关键词:东亚旱涝  纬向驻波  相关  数值试验
 
NUMERICAL EXPERIMENTS OF THE CORRELATION BETWEEN DROUGHT-FLOOD IN EAST CHINA AND EAST ASIAN ZONAL STATIONARY WAVES
Abstract:Asia is a distinct monsoon region in the world. In China the characteristics ofrainfall distribution are not only closely related to the background of the East Asian planetary scale circulation, but also to the structure of large topography in this area. By using a primitive equation model in p-σ coordinates,this study focuses on the West Pacific subtropical high,the intensity of the continental warm low system and their combination, i. e., the characteristics of zonal stationary waves corresponding to the EastAsian summer monsoons of different intensities and the East Asian sealand thermalstate in order to reveal the relationship between the summer monsoon flow pattern andthe rainfall distribution in East China. Studies are made of the correlation between the confluent features of the East Asian monsoon flow and the sea-land zonal stationary wave patterns, and the relationof the pattern of warm wet regions in summer and the formation of the warm wettongues to the rainfall in East China. In addition. the dynamical structure of the upper-and lower-level flow fields and the features of the South Asian high during the formation of rain belt in East China.
keywords:drought and flood in East China  zonal stationary wave  correlation  numerical experiment
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