doi:  10.3878/j.issn.1006-9895.1705.16253
1956-2012年浙闽登陆热带气旋降水精细化观测统计分析

Statistical Analysis of Accurate Observation of Precipitation of Tropical Cyclone Landing Zhejiang and Fujian Provinces from 1956 to 2012
摘要点击 2211  全文点击 100  投稿时间:2016-10-26  修订日期:2017-05-15
查看HTML全文  查看全文  查看/发表评论  下载PDF阅读器
基金:  国家自然科学基金;国家重点基础研究发展计划;上海台风研究基金课题
中文关键词:  热带气旋,降水分布特征,浙闽,精细化观测,统计分析
英文关键词:  Tropical cyclone, Distribution characteristics of precipitation, Zhejiang and Fujian provinces, Accurate observation, Statistical analysis
              
作者中文名作者英文名单位
王坚红wangjianhong南京信息工程大学气象灾害预报预警与评估协同创新中心
姜云雁jiangyunyan南京信息工程大学气象灾害预报预警与评估协同创新中心
崔晓鹏cuixiaopeng中国科学院大气物理研究所云降水物理与强风暴重点实验室
沈新勇南京信息工程大学气象灾害预报预警与评估协同创新中心
任福民中国气象科学研究院
引用:王坚红,姜云雁,崔晓鹏,沈新勇,任福民.2018.1956-2012年浙闽登陆热带气旋降水精细化观测统计分析[J].大气科学
Citation:wangjianhong,jiangyunyan,cuixiaopeng.2018.Statistical Analysis of Accurate Observation of Precipitation of Tropical Cyclone Landing Zhejiang and Fujian Provinces from 1956 to 2012[J].Chinese Journal of Atmospheric Sciences (in Chinese)
中文摘要:
      选取我国东南沿海热带气旋登陆数目多、经济发达的浙江和福建两省,利用国家级地面气象站逐小时降水观测资料,结合热带气旋降水客观分离方法,对1956-2012年(共57年)浙闽沿海登陆热带气旋降水开展客观分离,统计分析热带气旋登陆期间降水精细化时空分布特征。结果表明:热带气旋平均路径在登陆前6小时至登陆后24小时呈西北行,累积降水具有明显非对称分布特征,与主要水汽辐合区相吻合,登陆后24小时至48小时的降水分布与鄱阳湖水体以及局地地形有密切联系;伴随登陆进程,降水分布呈现显著变化,登陆前,浙闽两省降水较强;登陆后,降水范围向内陆扩展到浙闽两省以外地区;登陆点聚类分析指出,所有类别的较强降水时段均位于登陆前12小时至登陆后6小时,但不同类别的降水分布和演变特征具有显著差异,这种差异与局地地形和热带气旋环流所处位置关系密切;小时强降水统计分析显示,伴随着登陆进程强降水频次分布逐渐变化和向内陆地区推进,高频次强降水主要出现在登陆前、后6小时的浙闽两省沿海地区,且以两省交界附近地区最为集中,与该地区明显的高大地形分布有着密切的关系。两省各台站由登陆热带气旋带来的小时降水极值差异较大,从10到143 mm均有分布,大部分极值在30至60 mm之间。其中,极值大于50 mm的站点主要分布在沿海地区,在浙闽交界处较为集中,与小时强降水的频次分布一致。
Abstract:
      To investigate statistically accurate temporal and spatial distribution characteristic of precipitation of tropical cyclone(TC) during landing, developed Zhejiang and Fujian provinces with numerous TC landing are selected as the research area, using hourly precipitation observation data of national ground surface weather station and Objective Synoptic Analysis Technique of TC. The results show that the averaged track of TC from 6 hours pre-landing to 24 hours after landing appears to move northwest and accumulated precipitation is characterized by asymmetric distribution, matching the water vapor convergent area. The rainbelt is parallel to coastline and the rainfall distribution from 24 hours after landing to 48 hours after landing is closely related to Poyang Lake and local topography. The distribution of precipitation changes significantly with landing, heavy rainfall presents to be located in Zhejiang and Fujian provinces and expands to inland areas outside of that two provinces after landing. The cluster analysis of landfall places indicates that all types have their heaviest rainfall from 12 hours pre-landing to 6 hours after landing, however, the rainfall distribution and evolution characteristics of different types vary notably from each other because of local topography and the location of TC circulation. The statistical analysis of hourly heavy rainfall reveals that high frequency of heavy rainfall appears in the coastal areas of Zhejiang and Fujian provinces from 6 hours pre-landing to 6 hours after landing, and concentrates on the common border of two provinces owing to the precipitous terrain of this region. Hourly precipitation extremes caused by landing TC of stations in these two provinces vary from 10mm to 143mm, most are between 30mm and 60mm. Stations with hourly precipitation extreme more than 50mm are distributed mainly over coastal areas and gather in the common border of Zhejiang and Fujian provinces, its distribution is consistent with the frequency of hourly heavy rainfall.
主办单位:中国科学院大气物理研究所 单位地址:北京市9804信箱
联系电话: 010-82995051,010-82995052传真:010-82995052 邮编:100029 Email:dqkx@mail.iap.ac.cn
本系统由北京勤云科技发展有限公司设计
京ICP备09060247号