OLR与南海热带气旋发展的关系  

RELATIONSHIP OF OLR AND DEVELOPMENT OF TROPICAL CYCLONE OVER SOUTH CHINA SEA

作　　者：罗秋红[1] 李天然[1] 何夏江[1] 

机构地区：[1]广州中心气象台,广州510080

出　　处：《应用气象学报》2004年第1期81-87,共7页Journal of Applied Meteorological Science

基　　金：中国气象局"南海海洋天气预报技术研究"课题资助

摘　　要：利用OLR资料 ,对近十多年 ( 1 990～ 2 0 0 0年 )的南海热带气旋的发生、发展与OLR之间的关系进行了分析研究。研究结果表明 :南海热带低压能否发展加强成热带风暴与南海区及其附近OLR值的变化有较好的对应关系 ;OLR低值中心存在于辐合带中热带低压易发展 ;在双台风状态下 ,两个低值中心的强弱情况和距离决定热带低压能否发展。通过定义一个南海热带低压的发展指数IOD(IndexofDevelopment)来定量描述OLR等值线的梯度变化和南海热带低压发展的关系 ;当南海热带低压的发展指数IOD≥ 9时 。The relationship of OLR and the development of tropical cyclones over the South China Sea is studied by using the OLR data (1990～2000). The results show that there is a good relationship between the development of South China Sea tropical depression and the OLR variation over the South China Sea. Tropical depression would easily develop into tropical storm when OLR low center embedded in ITCZ. Under the state of binary typhoons,the development of South China Sea tropical depression depended on the strength and distances of two OLR low centers. IOD (Index of development)was defined to describe the relationship between the variation of OLR and the development of South China Sea tropical depression quantitatively. Tropical depression would easily develop into tropical storm when IOD≥9.

关 键 词：向外长波辐射 OLR 热带气旋 南海 发展指数 

分 类 号：P444[天文地球—大气科学及气象学]