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Volume 16 Issue 2

Apr.  1999

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Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 1999 >  16(2): 314-321

Study on Moist Potential Vorticity and Symmetric Instability during a Heavy Rain Event Occurred in the Jiang-Huai Valleys

  • 1.

    Nanjing Institute of Meteorology, Nanjing 210044,Nanjing Institute of Meteorology, Nanjing 210044


doi: 10.1007/BF02973091

  • In the light of the theory on moist potential vorticity (MPV) investigation was undertaken of the 700 hPa vertical (horizontal) component MP1 (MPV2) for the heavy rain event occurring in Ju-ly 5-6,1991. Results show that the distribution features of the two components were closely related to the development of a mesoscale cyclone as a rainstorm-causing weather system in the lower troposphere in such a way that the ambient atmosphere of which MPV1>0 and MPV2<0 with |MPVl|≥|MPV2| favored the genesis of conditional symmetric instability (CSI) and that, as in-dicated by calculations, a CSI sector was really existent in the lower troposphere during the heavy rain happening and contributed greatly to its development.
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    [2] Xu Liren, Zhao Ming, 2000: The Influences of Boundary Layer Parameterization Schemes on Mesoscale Heavy Rain System, ADVANCES IN ATMOSPHERIC SCIENCES, 17, 458-472.  doi: 10.1007/s00376-000-0036-3
    [3] SUN Li, SHEN Baizhu, SUI Bo, 2010: A Study on Water Vapor Transport and Budget of Heavy Rain in Northeast China, ADVANCES IN ATMOSPHERIC SCIENCES, 27, 1399-1414.  doi: 10.1007/s00376-010-9087-2
    [4] XIONG Zhe, WANG Shuyu, ZENG Zhaomei, FU Congbin, 2003: Analysis of Simulated Heavy Rain over the Yangtze River Valley During 11-30 June 1998 Using RIEMS, ADVANCES IN ATMOSPHERIC SCIENCES, 20, 815-824.  doi: 10.1007/BF02915407
    [5] SHAO Aimei, QIU Chongjian, LIU Liping, 2004: Kinematic Structure of a Heavy Rain Event from Dual-Doppler Radar Observations, ADVANCES IN ATMOSPHERIC SCIENCES, 21, 609-616.  doi: 10.1007/BF02915728
    [6] Huiyan XU, Xiaofan LI, Jinfang YIN, Dengrong ZHANG, 2023: Predecessor Rain Events in the Yangtze River Delta Region Associated with South China Sea and Northwest Pacific Ocean (SCS-WNPO) Tropical Cyclones, ADVANCES IN ATMOSPHERIC SCIENCES, 40, 1021-1042.  doi: 10.1007/s00376-022-2069-3
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    [8] YU Zifeng, LIANG Xudong, YU Hui, Johnny C. L. CHAN, 2010: Mesoscale Vortex Generation and Merging Process: A Case Study Associated with a Post-Landfall Tropical Depression, ADVANCES IN ATMOSPHERIC SCIENCES, 27, 356-370.  doi: 10.1007/s00376-009-8091-x
    [9] Baofeng JIAO, Lingkun RAN, Na LI, Ren CAI, Tao QU, Yushu ZHOU, 2023: Comparative Analysis of the Generalized Omega Equation and Generalized Vertical Motion Equation, ADVANCES IN ATMOSPHERIC SCIENCES, 40, 856-873.  doi: 10.1007/s00376-022-1435-5
    [10] Gang LI, Daoyong YANG, Xiaohua JIANG, Jing PAN, Yanke TAN, 2017: Diagnosis of Moist Vorticity and Moist Divergence for a Heavy Precipitation Event in Southwestern China, ADVANCES IN ATMOSPHERIC SCIENCES, 34, 88-100.  doi: 10.1007/s00376-016-6124-9
    [11] Zuohao CAO, Da-Lin ZHANG, 2004: Tracking Surface Cyclones with Moist Potential Vorticity, ADVANCES IN ATMOSPHERIC SCIENCES, 21, 830-835.  doi: 10.1007/BF02916379
    [12] Zuohao CAO, Da-Lin ZHANG, 2005: Sensitivity of Cyclone Tracks to the Initial Moisture Distribution: A Moist Potential Vorticity Perspective, ADVANCES IN ATMOSPHERIC SCIENCES, 22, 807-820.  doi: 10.1007/BF02918681
    [13] Zuohao Cao, G.W.K. Moore, 1998: A Diagnostic Study of Moist Potential Vorticity Generation in an Extratropical Cyclone, ADVANCES IN ATMOSPHERIC SCIENCES, 15, 152-166.  doi: 10.1007/s00376-998-0036-2
    [14] LU Weisong, SHAO Haiyan, 2003: Generalized Nonlinear Subcritical Symmetric Instability, ADVANCES IN ATMOSPHERIC SCIENCES, 20, 623-630.  doi: 10.1007/BF02915505
    [15] Shen Xinyong, Ni Yunqi, Ding Yihui, 2002: On Problem of Nonlinear Symmetric Instability in Zonal Shear Flow, ADVANCES IN ATMOSPHERIC SCIENCES, 19, 350-364.  doi: 10.1007/s00376-002-0027-7
    [16] GAO Shouting, ZHOU Yushu, CUI Xiaopeng, DAI Guoping, 2004: Impacts of Cloud-Induced Mass Forcing on the Development of Moist Potential Vorticity Anomaly During Torrential Rains, ADVANCES IN ATMOSPHERIC SCIENCES, 21, 923-927.  doi: 10.1007/BF02915594
    [17] Bao Chenglan, 1985: ADVANCES IN THE SOUTH CHINA FFS HEAVY RAIN RESEARCH, ADVANCES IN ATMOSPHERIC SCIENCES, 2, 282-294.  doi: 10.1007/BF02677244
    [18] Dai Honghua, Zheng Qisong, Zhao Zhaoxin, 1987: AN EXPERT SYSTEM FOR PREDICTING THE REGIONAL HEAVY RAIN, ADVANCES IN ATMOSPHERIC SCIENCES, 4, 496-505.  doi: 10.1007/BF02656748
    [19] Brian HOSKINS, 2015: Potential Vorticity and the PV Perspective, ADVANCES IN ATMOSPHERIC SCIENCES, 32, 2-9.  doi: 10.1007/s00376-014-0007-8
    [20] JING Li, LU Hancheng, WANG Hanjie, ZHU Min, KOU Zheng, 2004: A Mesoscale Analysis of Heavy Rain Caused by Frontal and Topographical Heterogeneities on Taiwan Island, ADVANCES IN ATMOSPHERIC SCIENCES, 21, 909-922.  doi: 10.1007/BF02663597
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    • Manuscript History

    Manuscript received: 10 April 1999
    Manuscript revised: 10 April 1999
    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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    Study on Moist Potential Vorticity and Symmetric Instability during a Heavy Rain Event Occurred in the Jiang-Huai Valleys

    • 1. Nanjing Institute of Meteorology, Nanjing 210044,Nanjing Institute of Meteorology, Nanjing 210044
    • Manuscript received: 1999-04-10
    • Manuscript revised: 1999-04-10

    Abstract: In the light of the theory on moist potential vorticity (MPV) investigation was undertaken of the 700 hPa vertical (horizontal) component MP1 (MPV2) for the heavy rain event occurring in Ju-ly 5-6,1991. Results show that the distribution features of the two components were closely related to the development of a mesoscale cyclone as a rainstorm-causing weather system in the lower troposphere in such a way that the ambient atmosphere of which MPV1>0 and MPV2<0 with |MPVl|≥|MPV2| favored the genesis of conditional symmetric instability (CSI) and that, as in-dicated by calculations, a CSI sector was really existent in the lower troposphere during the heavy rain happening and contributed greatly to its development.

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