青藏高原对亚洲季风平均环流影响的数值试验  

NUMERICAL EXPERIMENTS OF THE INFLUENCE OF QINGHAI-XIZANG PLATEAU ON THE MEAN CIRCULATION OF ASIAN MONSOON

作　　者：吴爱明[1] 倪允琪[1] 

机构地区：[1]南京大学大气科学系

出　　处：《高原气象》1997年第2期153-164,共12页Plateau Meteorology

基　　金：国家攀登计划B项目

摘　　要：利用垂直方向具有９层σ面、水平方向菱形截断波数为１５的全球大气环流谱模式和有、无青藏高原大地形两种情况下１０年积分的模拟结果，研究了青藏高原大地形对亚洲季风平均环流的影响。结果表明：有、无青藏高原大地形，亚洲冬、夏季季风平均环流均存在很大的差异。去除地形，使夏季高层的南亚高压、低层的大陆热低压、副热带高压及冬季的大陆冷高压在位置或强度上发生了改变；地形的有、无决定着冬季东亚大槽的强度；索马里越赤道气流有地形时明显较无地形时强；地形的有无还影响着降水强度和雨带的分布。另外。An atmospheric general circulation model with 9 sigma levels in the vertical and rhomboidal trunction at wave number 15 in the horizonal is run for 10 years with and without Qinghai-Xizang Plateau respectively(called TP and NTP experiments hereafter) Comparing the results of TP and NTP experiment,the influence of Qinghai-Xizang Plateau on the mean circulation of Asian monsoon is investigated It is found that obvious differences between the mean circulations of Asian monsoon with and without Qinghai-Xizang Plateau exist either in summer or in winter Were Qinghai-Xizang Plateau moved away,both position and strength of the South Asian low in the lower layer and the anti-cyclonic circulation in the upper layer as well as the subtropical high in summer would change greatly,so does the continental cold high in winter The East Asian trough in winter and the cross-equatorial flow near Somali in summer are stronger with Qinghai-Xizang Plateau than those without it The intensity and distribution of precipitation are also affected by Qinghai-Xizang Plateau Furthermore,the seasonal variation of the subtropic high and rain belt have a close relation with Qinghai-Xizang Plateau

关 键 词：大气环流模式 青藏高原 季节变化 季风 数值试验 

分 类 号：P435[天文地球—大气科学及气象学] P425.42