Statistical Research on Climatic Characteristics of Jianghuai Cyclones
Zhou Yue
Xia Lan
Abstract：According to the definition of Jianghuai cyclone,climatic statistics of Jianghuai cyclones from 1979 to 2010 are obtained by objective detection and tracking algorithm using the ECMWF ERA-Interim reanalysis data.The results show that the frequency of Jianghuai cyclones has significant annual variation but the secular trend change with time is not obvious.As the cold air is active in spring and could easily interact with the warm air from the southwest of subtropical high at Jianghuai area,it makes Jianghuai cyclones occurring more frequent in spring,most in May.However,the East Asia is controlled by continental cold high in winter,which leads to cyclones fewer in autumn and winter.Influenced by factors such as topography and underlying surface,the main source region of Jianghuai cyclones are located in Dongting Lake region,Poyang Lake region,and northeast of Dabie Mountain area.The percent of 43.9 Jianghuai cyclones have the mean deepening rates of 0--1 hPa/6h.The maximum deepening rates of most Jianghuai cyclone is within 0--2 hPa/6h (66.4％),and explosive cyclones are hard to be formed.The lifetime of Jianghuai cyclones is short and mainly lasting for 1 to 2 days.
Keywords：Jianghuai cycloneobjective detection and tracking algorithm of cycloneclimatic characteristic
Publication Date：2017-07-02
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：7( 79-85 )