登陆广东热带气旋的降水分布和移速变化  

RELATIONSHIP BETWEEN RAIN PATTERN AND MOTION OF TROPICAL CYCLONES MAKING LANDFALL IN GUANGDONG

作　　者：魏清[1] 黄敏辉[2] 黎伟标[1] 贺海晏[1] 

机构地区：[1]中山大学大气科学系/季风与环境研究中心,广东广州510275 [2]广东省气象局,广东广州510080

出　　处：《热带气象学报》2003年第B09期166-172,共7页Journal of Tropical Meteorology

基　　金：国家科技部重点项目(2002DIA20026)资助

摘　　要：利用1980～2001年登陆广东的72个热带气旋的路径和降水资料,计算了热带气旋登陆前后的移动速度和加速度,比较分析了热带气旋主要降水落区与热带气旋移速变化的关系。计算结果统计表明:登陆广东的热带气旋中,有66.1%的个例在登陆时移速加快。当主要降水落区位于热带气旋前进方向右侧时,热带气旋的12小时平均加速度为正的占了大部分(81.8%);当主要降水落区位于热带气旋前进方向左侧时,近八成(78.6%)的热带气旋平均加速度为负。这些统计结果进一步从诊断事实上说明了地形以及非绝热加热等因子对台风移动的可能影响。In this paper, the relationship between the rain pattern and the motion of the tropical cyclones (TC) making landfall on Guangdong is investigated. Analyses include 72 TC cases of landfall on the coast of Guangdong during 1980~2001. Results show that after 66.1 % of the landfalls the TCs tend to accelerate in their forward motion. Especially, when main rainfall appears to the right of the centers (viewing in the direction of motion) 81.8 % of the landfall TCs have a positive 12-hour average acceleration; when main rainfall appears to the left of the centers 78.6 % of them have a negative 12-hour average acceleration. It is suggested that topography and diabatic heating play important roles in the motion of landfall TCs.

关 键 词：热带气旋 登陆广东 移速 降水分布 

分 类 号：P444[天文地球—大气科学及气象学]