| ISENTROPIC POTENTIAL VORTICITY ANALYSIS ON THE MESOSCALE CYCLONE DEVELOPMENT IN A TORRENTIAL RAIN PROCESS |
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| 作者姓名： | 李耀辉 寿绍文 范可 |
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| 作者单位： | Lanzhou Arid Meteorological Institute.Lanzhou 730020，Nanjing Institute of Meteorology Nanjing 210044，Yunnan University.Kunming 650091 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under the Projects No.49775259 and No.40075009. |
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| 摘 要： | The mesoscale model MM4 is used to simulate the torrential rain associated with Meiyu frontoccurring on 5—6 July.1991 in the Changjiang-Huaihe Basin.Based on the outputs of the model,the cause of the mesoscale cyclogenesis on the lower troposphere is investigated in terms of thepotential vorticity principle.The results show that because of the favorable pattern of moistisentropic surface,the absolute vorticity increases when cold air with high moist potential vorticityvalue rapidly slides down southwards along the moist isentropic surface,and then causes thecyclonic vortex development.
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ISENTROPIC POTENTIAL VORTICITY ANALYSIS ON THE MESOSCALE CYCLONE DEVELOPMENT IN A TORRENTIAL RAIN PROCESS |
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| LI Yaohui Lanzhou Arid Meteorological Institute.Lanzhou SHOU Shaowen Nanjing Institute of Meteorology,Nanjing FAN Ke Yunnan University.Kunming.ISENTROPIC POTENTIAL VORTICITY ANALYSIS ON THE MESOSCALE CYCLONE DEVELOPMENT IN A TORRENTIAL RAIN PROCESS[J].Acta Meteorologica Sinica,2002(1). |
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| Authors: | LI Yaohui Lanzhou Arid Meteorological InstituteLanzhou SHOU Shaowen Nanjing Institute of Meteorology Nanjing FAN Ke Yunnan UniversityKunming |
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| Institution: | LI Yaohui Lanzhou Arid Meteorological Institute.Lanzhou 730020SHOU Shaowen Nanjing Institute of Meteorology,Nanjing 210044FAN Ke Yunnan University.Kunming 650091 |
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| Abstract: | |
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| Keywords: | moist potential vorticity(MPV) isentropic surface mesoscale cyclogenesis |
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