Landing Path and Intensity Characteristics of Typhoons Affecting Hefei Area from 1959 to 2023

WU Yue; ZHU Shichao; BAI Ying; WANG Yu; ZHANG Jiao; GAO Yue

doi:10.16032/j.issn.1004-4965.2025.056

Abstract：Extreme weather caused by typhoons poses significant threats to the lives and property of inland city residents.Therefore,studying the landfall characteristics of typhoons affecting inland cities has become increasingly important.The China Meteorological Administration(CMA)tropical cyclone best-track data and ground observation data from 1959 to 2023 were used to analyze the landfall characteristics of typhoons affecting Hefei Area.Based on wind-rain impact differences,the typhoons were divided into three categories:those with only high rainfall(OP),those with only strong winds(OW),and those with severe wind and rain(PW).The results show that:(1)Over 65 years,89 typhoons affected Hefei.OP,OW,and PW accounted for 17%,20%,and 8%,respectively,totaling 45%and highlighting the importance of high-impact typhoons.(2)Temporally,typhoon activity showed distinct phased changes,with active periods from the 1980s to 1990s and after 2016.Before 2000,OW events were predominant,while OP events increased significantly afterward.PW events had recurrence intervals of 10-20 years.Seasonally,July to September was the period of concentrated influence,with an increase in PW frequency from August to September.(3)In terms of landfall characteristics,Fujian was the most frequent landfall province(31.2%);43.7%of typhoons underwent secondary landfalls,with 94%of them first making landfall in Taiwan before striking Fujian and Zhejiang.The landing intensity was mainly at the typhoon level,but OW strength was generally weaker than OP events.(4)In terms of movement paths,48%followed a Type IV path(turning south of 30 °N),the secondary dominant paths for OP/PW and OW were Type II(northwest)and Type III(northward turning)while respectively,Significantly,Jiangxi Province and the Jiangsu-Zhejiang-Anhui border region were key transitional zones for high-impact typhoon paths,corresponding to the main influence channels for OP and OW.The research results provide data support for the assessment of typhoon disaster risks and the formulation of defense strategies in Hefei.