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Volume 26 Issue 6

Nov.  2009

Article Contents
Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2009 >  26(6): 1081-1087

New Evidences on the Climatic Causes of the Formation of the Spring Persistent Rains over Southeastern China

  • 1.

    Shanghai Typhoon Institute, China Meteorological Administration, Shanghai 200030,Shanghai Typhoon Institute, China Meteorological Administration, Shanghai 200030,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029


doi: 10.1007/s00376-009-7202-z

  • The spring persistent rains (SPR) over southeastern China (SEC) are a unique synoptic and climatic phenomenon in East Asia. A former study has found that the southwesterly flow which lies on the southeastern flank of the Tibetan Plateau (TP) is one of the deflected westerly flows of the TP, and it is suggested to be the direct climatic cause of SPR. This study found that the southwesterly flow is also highly correlated with the sensible heating of the southeastern TP in interannual variability, in addition to having a high correlation in seasonal variability. These facts suggest that the thermal forcing of the TP is another important climatic cause of SPR. Numerical sensitivity experiments further prove that the mechanical and thermal forcings of the TP are the climatic causes of the formation of the SPR. On the other hand, the Nanling Mountains and Wuyi Mountains (NWM) over southeastern China not only increase the SPR precipitation amount evidently, but also make the SPR rain belt move to the south by blocking the strong southwesterly flow.
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    [2] GAO Shouting, Xiaofan LI, 2008: Impacts of Initial Conditions on Cloud-Resolving Model Simulations, ADVANCES IN ATMOSPHERIC SCIENCES, 25, 737-747.  doi: 10.1007/s00376-008-0737-6
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    [7] Jinlei CHEN, Yuan YUAN, Xianyu YANG, Zuoliang WANG, Shichang KANG, Jun WEN, 2023: The Characteristics and Controlling Factors of Water and Heat Exchanges over the Alpine Wetland in the East of the Qinghai–Tibet Plateau, ADVANCES IN ATMOSPHERIC SCIENCES, 40, 201-210.  doi: 10.1007/s00376-022-1443-5
    [8] QIAN Cheng, FU Congbin, Zhaohua WU, YAN Zhongwei, 2011: The Role of Changes in the Annual Cycle in Earlier Onset of Climatic Spring in Northern China, ADVANCES IN ATMOSPHERIC SCIENCES, 28, 284-296.  doi: 10.1007/s00376-010-9221-1
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    [12] WANG Zhi, GAO Kun, 2006: Adjoint Sensitivity Experiments of a Meso- -scale Vortex in the Middle Reaches of the Yangtze River, ADVANCES IN ATMOSPHERIC SCIENCES, 23, 267-281.  doi: 10.1007/s00376-006-0267-z
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    • Manuscript History

    Manuscript received: 10 November 2009
    Manuscript revised: 10 November 2009
    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

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    New Evidences on the Climatic Causes of the Formation of the Spring Persistent Rains over Southeastern China

    • 1. Shanghai Typhoon Institute, China Meteorological Administration, Shanghai 200030,Shanghai Typhoon Institute, China Meteorological Administration, Shanghai 200030,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029
    • Manuscript received: 2009-11-10
    • Manuscript revised: 2009-11-10

    Abstract: The spring persistent rains (SPR) over southeastern China (SEC) are a unique synoptic and climatic phenomenon in East Asia. A former study has found that the southwesterly flow which lies on the southeastern flank of the Tibetan Plateau (TP) is one of the deflected westerly flows of the TP, and it is suggested to be the direct climatic cause of SPR. This study found that the southwesterly flow is also highly correlated with the sensible heating of the southeastern TP in interannual variability, in addition to having a high correlation in seasonal variability. These facts suggest that the thermal forcing of the TP is another important climatic cause of SPR. Numerical sensitivity experiments further prove that the mechanical and thermal forcings of the TP are the climatic causes of the formation of the SPR. On the other hand, the Nanling Mountains and Wuyi Mountains (NWM) over southeastern China not only increase the SPR precipitation amount evidently, but also make the SPR rain belt move to the south by blocking the strong southwesterly flow.

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