Two types of heavy precipitation in the southeastern Tibetan Plateau  

青藏高原东南部的两类强降水

作　　者：Dianbin Cao Xuelong Chen Deliang Chen Yu Du Yuhan Luo Yang Hu Qiang Zhang Yaoming Ma Fahu Chen 曹殿斌;陈学龙;陈德亮;杜宇;罗雨涵;胡杨;张强;马耀明;陈发虎

机构地区：[1]Alpine Paleoecology and Human Adaptation Group(ALPHA),State Key Laboratory of Tibetan Plateau Earth System,Environment and Resources(TPESER),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China [2]Motuo Observation and Research Center for Earth Landscape and Earth System,Chinese Academy of Sciences,Linzhi 860712,China [3]Land-Atmoshere Interaction and its Climatic Effects Group,State Key Laboratory of Tibetan Plateau Earth System,Environment and Resources(TPESER),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China [4]Regional Climate Group,Department of Earth Sciences,University of Gothenburg,Gothenburg 40530,Sweden [5]School of Atmospheric Sciences,Sun Yat-sen University,Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519082,China [6]Ministry of Education Key Laboratory for Earth System Modeling,Department of Earth System Science,Tsinghua University,Beijing 100084,China

出　　处：《Science Bulletin》2025年第5期748-755,共8页科学通报(英文版)

基　　金：Second Tibetan Plateau Scientific Expedition,Research(STEP)Programme(2019QZKK0105);National Natural Science Foundation of China(U2442213,42122033,42475002 and 42075006).

摘　　要：The southeastern Tibetan Plateau(SETP)is the preeminent summer heavy precipitation region within the Tibetan Plateau(TP).However,the large-scale circulation types and dynamics driving summer heavy precipitation in the SETP remain inadequately elucidated.Using the hierarchical clustering method,two distinctive atmospheric circulation patterns associated with heavy precipitation were identified:the Tibetan Plateau vortex type(TPVT,constituting 56.6%of the events)and the mid-latitude trough type(MLTT,43.4%).A comprehensive examination of the two atmospheric circulation patterns reveals a clear nexus between the occurrences of summer heavy precipitation and positive vorticity anomalies,moisture convergence,as well as the southeastward displacement of the westerly jet core.Specifically,TPVT events are characterized by the eastward and dry-to-wet potential vorticity progression processes,while MLTT events are linked to the intrusion of a deep extratropical trough into the SETP.This study advances our understanding of the complex mechanisms governing the summer heavy precipitation in the SETP,shedding light on critical meteorological processes in the region.

关 键 词：Sout heastern Tibetan Plateau Heavy precipitation Atmospheric circulation patterns Tibetan Plateau vortex type Mid-latitude trough type 

分 类 号：D67[政治法律—政治学]