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Volume 24 Issue 1

Jan.  2007

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Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2007 >  24(1): 35-43

Roles of Mesoscale Terrain and Latent Heat Release in Typhoon Precipitation: A Numerical Case Study

  • 1.

    State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029; Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101,Meteorology Center of Beijing Military, PLAAF, Beijing 100061


doi: 10.1007/s00376-007-0035-8

  • The mesoscale orographic effects on typhoon Aere's precipitation are simulated using an Advanced Regional Eta-coordinate Model (AREM) version 3.0. In particular, the effects of the latent heat release are studied by two comparable experiments: with and without condensational heating. The results show that the typhoon rainfall is tripled by the southeastern China mesoscale terrain, and the condensational heating is responsible for at least half of the increase. One role of the latent heat release is to warm the atmosphere, leading to a depression of the surface pressure, which then causes a larger pressure difference in the zonal direction. This pressure gradient guides the water vapour to flow into the foothills, which in turn amplifies the water vapour flux divergence amplified, causing the typhoon rainfall to increase eventually. The other role of the latent heat release is to make the convection more organized, resulting in a relatively smaller rain area and stronger precipitation.
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    [2] GAO Shanhong, LIN Hang, SHEN Biao, FU Gang, 2007: A Heavy Sea Fog Event over the Yellow Sea in March 2005: Analysis and Numerical Modeling, ADVANCES IN ATMOSPHERIC SCIENCES, 24, 65-81.  doi: 10.1007/s00376-007-0065-2
    [3] Rucong YU, Yi ZHANG, Jianjie WANG, Jian LI, Haoming CHEN, Jiandong GONG, Jing CHEN, 2019: Recent Progress in Numerical Atmospheric Modeling in China, ADVANCES IN ATMOSPHERIC SCIENCES, 36, 938-960.  doi: 10.1007/s00376-019-8203-1
    [4] Xuewei FANG, Zhi LI, Chen CHENG, Klaus FRAEDRICH, Anqi WANG, Yihui CHEN, Yige XU, Shihua LYU, 2023: Response of Freezing/Thawing Indexes to the Wetting Trend under Warming Climate Conditions over the Qinghai –Tibetan Plateau during 1961–2010: A Numerical Simulation, ADVANCES IN ATMOSPHERIC SCIENCES, 40, 211-222.  doi: 10.1007/s00376-022-2109-z
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    [6] Yunji ZHANG, Eugene E. CLOTHIAUX, David J. STENSRUD, 2022: Correlation Structures between Satellite All-Sky Infrared Brightness Temperatures and the Atmospheric State at Storm Scales, ADVANCES IN ATMOSPHERIC SCIENCES, 39, 714-732.  doi: 10.1007/s00376-021-0352-3
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    [9] Wenbo XUE, Hui YU, Shengming TANG, Wei HUANG, 2024: Relationships between Terrain Features and Forecasting Errors of Surface Wind Speeds in a Mesoscale Numerical Weather Prediction Model, ADVANCES IN ATMOSPHERIC SCIENCES.  doi: 10.1007/s00376-023-3087-5
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    • Manuscript History

    Manuscript received: 10 January 2007
    Manuscript revised: 10 January 2007
    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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    Roles of Mesoscale Terrain and Latent Heat Release in Typhoon Precipitation: A Numerical Case Study

    • 1. State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029; Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101,Meteorology Center of Beijing Military, PLAAF, Beijing 100061
    • Manuscript received: 2007-01-10
    • Manuscript revised: 2007-01-10

    Abstract: The mesoscale orographic effects on typhoon Aere's precipitation are simulated using an Advanced Regional Eta-coordinate Model (AREM) version 3.0. In particular, the effects of the latent heat release are studied by two comparable experiments: with and without condensational heating. The results show that the typhoon rainfall is tripled by the southeastern China mesoscale terrain, and the condensational heating is responsible for at least half of the increase. One role of the latent heat release is to warm the atmosphere, leading to a depression of the surface pressure, which then causes a larger pressure difference in the zonal direction. This pressure gradient guides the water vapour to flow into the foothills, which in turn amplifies the water vapour flux divergence amplified, causing the typhoon rainfall to increase eventually. The other role of the latent heat release is to make the convection more organized, resulting in a relatively smaller rain area and stronger precipitation.

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