CAJ | 학술논문

利用T213、ECMWF数值预报资料和热带气旋历史资料,对1117号强台风＂纳沙＂造成广西持续大范围暴雨的成因进行分析。结果表明,造成广西大范围暴雨的主要原因是：＂纳沙＂登陆后,副热带高压强大,台风环流与副热带高压之间气压梯度增大,其右侧辐合加强,深厚偏东气流给台风输送了大量的水汽和能量,西南风急流与副高西侧强东南气流形成辐合,北方冷空气从低层南下,东北风与台风后部的东南风形成切变产生对流降水;加上台风自身带来的降水、急流降水以及冷空气入侵降水三部分相接,组成了＂纳沙＂影响期间的持续性强降水过程。
이용T213、ECMWF수치예보자료화열대기선역사자료,대1117호강태풍＂납사＂조성엄서지속대범위폭우적성인진행분석。결과표명,조성엄서대범위폭우적주요원인시：＂납사＂등륙후,부열대고압강대,태풍배류여부열대고압지간기압제도증대,기우측복합가강,심후편동기류급태풍수송료대량적수기화능량,서남풍급류여부고서측강동남기류형성복합,북방랭공기종저층남하,동북풍여태풍후부적동남풍형성절변산생대류강수;가상태풍자신대래적강수、급류강수이급랭공기입침강수삼부분상접,조성료＂납사＂영향기간적지속성강강수과정。
Based on prediction data of T213 and ECMWF and historical information of tropical cyclone,the causes of long lasting and large scale rainstorm brought by Nesat in Guangxi were analyzed.Nesat,of high intensity,carried much vapor and energy and went through Beibu Gulf by subtropical high pressure.After Nesat made landfall,subtropical high pressure maintained high and gradient between typhoon circulation and subtropical high pressure increased;the typhoon was supported by abundant vapors and energies by powerful eastern flows.Furthermore,northern cold airs went downward and met southeast wind behind of the typhoon,resulting in shears and convective precipitation.Therefore,the rains brought by the typhoon itself,jet stream,and cold air contributed to long lasting rainfall under influence of Nesat.