CAJ | 학술논문

利用NCEP/NCAR再分析资料,通过波包传播的诊断方法,对2008年9月22-27日我国川西地区持续性暴雨过程期间波包传播和积累进行了分析与研究,分析表明, 波包分布及传播能明显反映出降水过程的发生、维持和结束特征.波包的大值区域与强降水区域基本一致,强降水过程基本上产生于波包扰动能量积累的高值时段或处于高位相阶段.波包值的经向和纬向传播特征表明9月22-27日川西地区持续性暴雨过程主要受西太平洋副热带高压、偏北地区和高原地区的弱冷空气、孟湾和南海向盆地输送水汽的两条水汽通道以及台风"黑格比"的共同作用.
이용NCEP/NCAR재분석자료,통과파포전파적진단방법,대2008년9월22-27일아국천서지구지속성폭우과정기간파포전파화적루진행료분석여연구,분석표명, 파포분포급전파능명현반영출강수과정적발생、유지화결속특정.파포적대치구역여강강수구역기본일치,강강수과정기본상산생우파포우동능량적루적고치시단혹처우고위상계단.파포치적경향화위향전파특정표명9월22-27일천서지구지속성폭우과정주요수서태평양부열대고압、편북지구화고원지구적약랭공기、맹만화남해향분지수송수기적량조수기통도이급태풍"흑격비"적공동작용.
Based on the NCEP/NCAR reanalysis data, using the diagnosis analysis of wave packet propagation (WPD) and the wave packet propagation and accumulation during Sichuan 2008 "Sep.22" heavy rainfall process is analyzed. The results show that the characteristic of wave packet have better reflection in the occurrence, maintain and finish of heavy rainfall process. The high value center of wave packet is basically the same to the strong precipitation region. Perturbation energy has been maintaining high value period or stronger phase when the process occurs. The characteristic of wave packet propagation shows that this process is mainly influenced by the western Pacific subtropical high (WPSTH), cold air from the northward and the Qinghai-Xizang Plateau, the moisture transportation to Sichuan from Bay of Bengal and South China Sea. The heat and water vapor provided by typhoon Hagupit were very important too.