摘要
强热带风暴"碧利斯"(200604)登陆后其低压环流较长时间地维持,并与西南季风相互作用,造成了湖南省东南部历史罕见的特大致洪暴雨。针对该暴雨天气过程,采用天气学分析和数值模拟试验等方法,对湘东南特殊地形对该台风暴雨的影响进行了研究。结果表明:湘东南多山体分布且向北开口的喇叭口特殊地形通过与"碧利斯"低压环流北侧增强的东北风相配合,有利于水汽输送和中尺度对流系统发生、发展,对湘东南暴雨有明显增幅作用。
The landing of a strong tropical storm named Bilis（200604） resulted in a long-lasting low-pressure system,whose interaction with the South China Sea（SCS） monsoon led to a rare storm rainfall in history in the southeastern part of Hunan Province.Based on various conventional observations,unconventional fine-grid observations,the NCEP reanalysis and data from the meso-scale Advanced Regional Eta-coordinate Model（AREM）,numerical simulation and diagnostic analysis were performed to study the terrain effects on the location and intensity of the rainstorm.The results indicate that there are more mountains with northward trumpet-shaped terrain in the southeast part of Hunan.This specific terrain coordinated with the enhanced northeast wind of the north side of ＂Bilis＂ low pressure circulation is beneficial to water vapor transport and development of meso-scale convective systems playing an envident role to increace the rainstorm in the southeast part of Hunan.
出处
《暴雨灾害》
2011年第2期122-129,共8页
Torrential Rain and Disasters
基金
中国气象局气象关键技术集成与应用项目(CMAGJ2011M35)
财政部/科技部公益类行业专项(GYHY200906010)
国家重点基础研究专项(2010CB951904)
国家自然科学基金(41075034)
关键词
“碧利斯”特大暴雨
数值模拟
地形增幅作用
Rainstorm of the tropical storm ＂Bilis＂
Numerical simulation
Amplifying of torrential rain
