台风“纳沙”造成广西强降水成因分析  

Main Factors Afecting the Rainfall in Guangxi Caused by Typhoons "Nasha"

作　　者：唐文 陈见 农孟松 

机构地区：[1]广西壮族自治区气象台,广西南宁530022

出　　处：《宁夏农林科技》2012年第10期173-174,F0003,共3页Journal of Ningxia Agriculture and Forestry Science and Technology

基　　金：广西科技厅自然科学资金项目(2010GXNSFA013012)

摘　　要：主要对2011年第17号台风"纳沙"对广西大范围暴雨天气的成因进行分析。结果表明:引起广西大范围暴雨的主要因素是冷空气与"纳沙"的交汇作用、副热带高压带的稳定加强、西南季风云团的卷入。整个过程中不同时段的降水具有不同的成因,9月29日20时～30日20时为第一阶段,强降水是由"纳沙"内部环流与冷空气相互作用引起的;9月30日20时～10月2日20时为第二阶段,强降水主要是由"纳沙"外围西南气流与副热带高压带西侧东南气流辐合引起的。This paper mainly analyzed the formation of Guangxi rainstorm weather caused by typhoons ＂Nasha＂ on 2011 No.17.The results showed that： caused by heavy rains in Guangxi was the main factor of interaction of cold air and ＂Nasha＂,enhancement of subtropical high-pressure belt stability,enhancement of southwest monsoon cluster.The precipitation process in different periods of has different causes.September 29th 20：00 to September 30th was the first stage,strong precipitation was caused by the interaction of ＂Nasha＂ internal circulation and cold air;September 30th 20：00 to October 2nd 20：00 was the second stage,strong precipitation was mainly caused by convergence of ＂Nasha＂ external southwest airflow and the subtropical southeast airflow.

关 键 词：台风 冷空气 副热带高压带 降水成因 

分 类 号：P458.124[天文地球—大气科学及气象学]