不同路径台风影响舟山的大风气候特征分析

Analysis on climatic gale characteristics of typhoons affecting Zhoushan with different paths

将台风路径分为在浙江登陆的台风、在福建及以南登陆的台风、海上转向台风、在浙江以北登陆的台风这4种分别研究舟山的台风大风特征。4种台风路径中影响舟山最多的为海上转向台风,其中在125°E转向的最多,最少的为在浙江以北登陆的台风。统计分析1989—2020年4种不同路径台风影响舟山过程风力的分布范围、中位数、极大值等气候特征,并研究不同路径下台风过程风力与台风中心和舟山的最近距离以及最近距离时的台风强度之间的分布关系,以此绘制点聚图。

This paper divides typhoon paths into four types to study the climatic gale characteristics in Zhoushan:typhoons that landed in Zhejiang,typhoons that landed in or south of Fujian,typhoons that turned offshore,typhoons that landed north of Zhejiang.Typhoons which have the largest impacts on Zhoushan is those turned offshore,while typhoons which have the smallest impacts on Zhoushan is those landed north of Zhejiang.It is found that typhoons that turned offshore mostly turned at 125°E.This study further analyzes the climatic wind characteristics during the typhoon processes affecting Zhoushan from 1989 to 2020,such as distribution areas,median value,and maximum value.The relationships among wind grade,typhoon intensity and the closest distance between the typhoon center and Zhoushan are also studied.