江淮气旋气候学特征的统计研究
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引用本文:周 越,夏 兰.江淮气旋气候学特征的统计研究[J].气象与环境科学,2017,40(3):79-85.Zhou Yue, Xia Lan.Statistical Research on Climatic Characteristics of Jianghuai Cyclones[J].Meteorological and Environmental Sciences,2017,40(3):79-85.
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作者单位
周 越,夏 兰  
DOI:10.16765/j.cnki.1673-7148.2017.03.013
基金项目:
中文摘要:从江淮气旋的定义出发,采用欧洲中期天气预报中心的ERA-Interim再分析资料,运用气旋的客观判定与追踪算法追踪江淮气旋,分析了1979—2010年江淮气旋的气候特征。结果表明:江淮气旋发生的频数有显著的年际变化,但随时间变化的长期趋势并不明显。由于春季冷空气活动频繁,且易与副高西南侧气流汇合形成气旋,因此春季是江淮气旋最活跃的季节,其中5月份江淮气旋发生次数最多;而在冬季,东亚地区受大陆冷高压控制,形势稳定,不易形成气旋,故秋冬季江淮气旋出现较少。受地形和下垫面等因素影响,江淮气旋生成的源地主要位于洞庭湖地区、鄱阳湖地区及大别山区东北侧。43.9%的江淮气旋中心平均降压率为0~-1 hPa/6h,大多数江淮气旋中心最大降压率为0~-2 hPa/6h (占66.4%),较难形成暴发性气旋。江淮气旋生命史较短,主要为1~2天。
中文关键词:江淮气旋  气旋的客观判定与追踪算法  气候学特征
 
Statistical Research on Climatic Characteristics of Jianghuai Cyclones
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 cyclone  objective detection and tracking algorithm of cyclone  climatic characteristic
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