一次华西秋季大暴雨的水汽分析  

Vapour Analysis of A Heavy Rain in West of China in Autumn

作　　者：郁淑华[1] 

机构地区：[1]成都高原气象研究所,四川成都610071

出　　处：《高原气象》2004年第5期689-696,共8页Plateau Meteorology

基　　金：科技部社会公益专项资金项目(2001DIB20106);四川省重点科技项目"1998年四川洪涝暴雨的成因与预报研究"共同资助

摘　　要：通过对1998年9月15～17日四川盆地北部、西部大暴雨过程的水汽分析,得出几点认识,在这次暴雨过程中,(1)对流层低层的主要水汽源是在南海,东海、孟加拉湾也有水汽输送;对流层中上部有从印度洋输送到青藏高原,再伸展到四川盆地的水汽。(2)在对流层低层有较强的水汽辐合,反映了这次暴雨是在深厚的水汽层内且低层有较强水汽辐合中产生的。(3)暴雨强度的变化与对流层中上部印度洋水汽输送到高原上空与否密切相关,印度洋水汽输送到(撤离)高原上空对华西暴雨发展(减弱)有指示意义。The vapour of the heavy rain process in the west of Sichuan Basin on 15～17 september 1998 was analysed. Some resluts are obtained as follows: (1) During the heavy rain, the main vapour source in lower level of troposphere is in South China sea, and secondly East China sea and Bay of Bengal. The vapour transportation in middle and upper parts of troposphere is transferred from Indian Ocean to Qinghai-Xizang Plateau and then extend to Sichun Basin. (2) The heavy rain happened under the condition of stronger vapour convergence in lower level of troposphere and thicker vapour layer from lower level to middle and upper parts of troposphere. (3) The heavy rain change is nearly connection with vapour transportation is transferred from Indian Ocean to Qinghai-Xizang Plateau in middle and upper parts of troposphere. The vapour transportation has indicative significance for heavy rain development.

关 键 词：暴雨 水汽分析 水汽源 四川盆地 

分 类 号：P458.121.1[天文地球—大气科学及气象学]