大气科学2018，Vol.42Issue(1)：16-32,17.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 Observations of Tropical Cyclone Precipitation in Zhejiang and Fujian Provinces from 1956 to 2012
摘要
Abstract
Temporal and spatial distribution characteristics of tropical cyclone (TC) precipitation are investigated in the present study over Zhejiang and Fujian Provinces,where TCs frequently make landfall,using hourly precipitation observations collected at national ground surface weather stations and the objective synoptic analysis technique of TC.The results show that the averaged track of TCs from 6 hours pre-landing to 24 hours after landing appears to move northwestward and the accumulated precipitation is characterized by an asymmetric distribution,which is consistent with the water vapor convergence area.The rainbelt is parallel to the coastline and the rainfall distribution from 24 hours to 48 hours after the TC landing is closely related to effects of Poyang Lake and local topography.The distribution of precipitation changes significantly with the inland moving of TCs.Heavy rainfall is concentrated in Zhejiang and Fujian Provinces and expands to inland areas that are even beyond the two provinces after landing.The cluster analysis of TC landfall locations indicates that all types of TC precipitation are the heaviest from 12 hours pre-landing to 6 hours after landing.However,rainfall distribution and evolution characteristics of different types of precipitation vary notably due to the influence of local topography and the location of TC circulation.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 along the border of the two provinces due to the precipitous terrain in this region.Hourly precipitation extremes caused by landing TCs in the two provinces vary from 10 mm to 143 mm,while most are between 30 mm and 60 mm.Stations with hourly precipitation of more than 50 mm are mainly located over coastal areas and along the border of Zhejiang and Fujian Provinces.The distribution of extreme hourly precipitation is consistent with that of hourly heavy rainfall frequency.关键词
热带气旋/降水分布特征/浙、闽两省/精细化观测/统计分析Key words
Tropical cyclone/Distribution characteristics of precipitation/Zhejiang and Fujian Provinces/Accurate observations/Statistical analysis分类
天文与地球科学引用本文复制引用
王坚红,姜云雁,崔晓鹏,沈新勇,任福民..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,2018,42(1):16-32,17.基金项目
国家重点基础研究发展计划(973计划)项目2015CB452804、2015CB453201,国家自然科学基金项目41175056、41530427、41276033,上海台风研究基金课题项目2013ST01 National Basic Research Program of China (973 Program) (Grants 2015CB452804,2015CB453201),National Natural Science Foundation of China (Grants 41175056,41530427,41276033),Shanghai Typhoon Research Foundation (Grant 2013ST01) （973计划）
