【摘要】 对1965~2004年珠江三角洲出现的高温天气及高温天气出现时距珠江三角洲一定距离是否有热带气旋出现进行统计分析,发现珠江三角洲出现高温天气时在东北偏东方至东南方(60°~150°)这一扇形区距离珠江三角洲为500~2000 km的弧面中有热带气旋出现的机率较大,说明热带气旋与珠江三角洲高温天气的形成关系密切;然后对2004年6月底7月初珠江三角洲的高温天气过程进行个例分析,又通过对历史天气过程进行普查,发现强大的高压环流和适当距离上的热带气旋外围下沉气流是珠江三角洲高温天气形成的重要条件。更多还原

【Abstract】 Based on the statistical analysis of high temperature weather over the Pearl River Delta from 1965 to 2004 and the occurrence of tropical cyclones at a certain distance from this area on the same time,it is found that the appearing probability of tropical cyclones is relatively high in the fan-shaped area of about 500 km to 2000 km ENE to SE(from 60° to 150°) of the Pearl River Delta when there is high temperature weather in the Pearl River Delta.It means that the formation of high temperature in the Pearl River Delta is closely correlated with tropical cyclones.An example in the late June 2004 is given.Through detailed investigation of historical synoptic processes,it is found that strong anticyclones and the peripheral subsidence of tropical cyclones at a certain distance are important conditions for the forming of high temperature weather in the Pearl River Delta.更多还原