摘要
利用1983-2004年6-9月常规天气资料、广州单站数据和此期间热带气旋年鉴资料、NCEP/NCAR再分析资料,并定义连续3天或以上日最高气温≥35℃为一次灾害性高温天气过程,对广州灾害性高温天气和热带气旋活动的关系进行了分析,结果发现：(1)广州市的灾害性高温天气的出现和热带气旋外围环流紧密相关,且37℃以上的灾害性高温天气主要出现在广州市东南或偏东方向400-1 600km范围内的洋面或海面有热带气旋活动时；(2)副热带高压控制下的强烈太阳辐射是广州灾害性高温出现的基础,而热带气旋外围下沉气流导致的强下沉增温是重要因素。
Using historical synoptic data, the surface observation data of Guangzhou, the data in the Yearbook on Tropical Cyclones of P. R. China, and NCEP/NCAR reanalysis data of geopotential height, vertical velocity from June to September over the years 1983 to 2004, and defining three days or more in succession with daily maximum temperature over 35 ℃ as a process of high temperature weather, this work analyzes the relationship between the activity of tropical cyclones and the disastrous high temperature weather in Guangzhou. The result shows that disastrous high temperature weather in Guangzhou is closely related to the outer circulation of tropical cyclones, and high temperature weather over 37 ℃ occur mainly when tropical cyclones move in the range from 400 to 1600 km southeast or south to Guangzhou. Furthermore, the rapid temperature increase with downdraft resulting from tropical cyclones is the major factor inducing disastrous high temperature weather in Guangzhou when the city is controlled by the subtropical high.
出处
《热带气象学报》
CSCD
北大核心
2006年第5期461-465,共5页
Journal of Tropical Meteorology
基金
广东省科技推广计划项目"新一代天气预报业务流程系统的推广应用"(2004B40501004)资助
关键词
灾害性高温
热带气旋
下沉增温
disastrous high temperature
tropical cyclones
warming by descending draft
