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华东登陆热带气旋降水不同分布的对比分析

卜松 李英

卜松, 李英. 华东登陆热带气旋降水不同分布的对比分析[J]. 大气科学, 2020, 44(1): 27-38. doi: 10.3878/j.issn.1006-9895.1906.18180
引用本文: 卜松, 李英. 华东登陆热带气旋降水不同分布的对比分析[J]. 大气科学, 2020, 44(1): 27-38. doi: 10.3878/j.issn.1006-9895.1906.18180
Comparative Analysis of Precipitation Distributions of Tropical Cyclones Making Landfall in East China[J]. Chinese Journal of Atmospheric Sciences, 2020, 44(1): 27-38. doi: 10.3878/j.issn.1006-9895.1906.18180
Citation: Comparative Analysis of Precipitation Distributions of Tropical Cyclones Making Landfall in East China[J]. Chinese Journal of Atmospheric Sciences, 2020, 44(1): 27-38. doi: 10.3878/j.issn.1006-9895.1906.18180

华东登陆热带气旋降水不同分布的对比分析

doi: 10.3878/j.issn.1006-9895.1906.18180
基金项目: 国家重点基础研究发展计划(973计划)项目2015CB452804,国家自然科学基金项目 41475055;41575063,气象预报业务关键技术发展专项YBGJXM(2018)1B-08、2018KJ027国家重点基础研究发展计划(973计划)项目2015CB452804,国家自然科学基金项目41475055、41575063,气象预报业务关键技术发展专项YBGJXM(2018)1B-08、2018KJ027

Comparative Analysis of Precipitation Distributions of Tropical Cyclones Making Landfall in East China

Funds: National Basic Research Program of China (973 Program) 2015CB452804;National Natural Science Foundation of China (Grants 41475055;41575063), Meteorological Forecasting Operation Key Technology Development Program (Grants YBGJXM (2018)1B-08, 2018KJ027Funded by National Basic Research Program of China (973 Program) (Grant 2015CB452804), National Natural Science Foundation of China (Grants 41475055, 41575063), Meteorological Forecasting Operation Key Technology Development Program (Grants YBGJXM (2018)1B-08, 2018KJ027)
  • 摘要: 利用CMORPH降水资料,将热带气旋(TC)登陆后的降水分为路径左侧降水(L型)和右侧降水(R型)两类,并针对登陆华东地区TC的 L型和R型降水的大气环流场、环境水平风垂直切变以及台风环流内的动热力条件进行对比分析,结果表明:2005~2014年间登陆华东地区的20例TC中包括12例L型和8例R型。总体来看,大气环流因子对于登陆华东TC降水分布起主要作用。L型降水TC高层南亚高压主要呈纬向带状分布,在登陆过程中路径左侧维持偏东风高空辐散气流,中层西风槽偏东,西太平洋副热带高压(简称副高)偏南,环境水平风垂直切变指向西南。R型降水TC高层南亚高压断裂,呈经向分布。TC路径左侧风场较均匀,右侧东南风高空辐散气流明显。副高的位置偏北呈块状,同时环境水平风垂直切变指向东北,有利于路径右侧降水。台风环流内,低层冷暖平流输送以及水汽辐合与降水落区也有较好对应关系。L型TC低层暖平流的输送使TC西南象限低层增暖,大气稳定度降低。同时水汽辐合区也主要位于西南象限,有利于TC路径左侧降水。而R型TC副高位置偏北可将南侧的东南暖湿气流向台风环流更西部输送,东北象限维持暖平流,有利于路径右侧降水发生。
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  • 收稿日期:  2018-06-22

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