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Volume 19 Issue 5

Sep.  2002

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Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2002 >  19(5): 870-884

Initiation Mechanism of Meso-β Scale Convective Systems

  • 1.

    Key Laboratory of Mesoscale Severe Weather, Ministry of Edueation, China ;Department of Atmospheric Science, Nanjing Institute of Meteorology, Nanjing, 210044,Department of Atmospherie Sciences, Nanjing University, Nanjing 210093,Department of Atmospherie Sciences, Nanjing University, Nanjing 210093


doi: 10.1007/s00376-002-0052-6

  • With the aid of the Penn State-NCAR MM5 model, the initiation mechanism of meso-β scaleconvective systems (MCS) is investigated on the basis of simulation of the temporal and spatialthermodynamic structure of the MCS that occurred in Wuhan, Hubei, China and its surrounding area on 21July 1998. Using the PV inversion method, comparisons among the upper-, middle-, and low-leveltropospheric potential vorticity (PV) perturbations, as well as their effects on the initiation of MCS, indicatethat the low-level tropospheric PV perturbations play an important role in the triggering of MCS. Furtheranalysis reveals that the interaction between the southwest low-level jet and the gravity-inertia wave indeedinitiates MCS in the conditionally unstable ambient atmosphere.
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    [2] Peiling FU, Kefeng ZHU, Kun ZHAO, Bowen ZHOU, Ming XUE, 2019: Role of the Nocturnal Low-level Jet in the Formation of the Morning Precipitation Peak over the Dabie Mountains, ADVANCES IN ATMOSPHERIC SCIENCES, 36, 15-28.  doi: 10.1007/s00376-018-8095-5
    [3] Zhong Zhong, Wang Hanjie, 2000: A Study of the Relationship between Low-level Jet and Inversion Layer over an Agroforest Ecosystem in East China Plain?, ADVANCES IN ATMOSPHERIC SCIENCES, 17, 299-310.  doi: 10.1007/s00376-000-0011-z
    [4] Yuhan LUO, Yu DU, 2023: The Roles of Low-level Jets in “21·7” Henan Extremely Persistent Heavy Rainfall Event, ADVANCES IN ATMOSPHERIC SCIENCES, 40, 350-373.  doi: 10.1007/s00376-022-2026-1
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    [6] Xubin ZHANG, 2022: Impacts of New Implementing Strategies for Surface and Model Physics Perturbations in TREPS on Forecasts of Landfalling Tropical Cyclones, ADVANCES IN ATMOSPHERIC SCIENCES, 39, 1833-1858.  doi: 10.1007/s00376-021-1222-8
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    [9] Rudi XIA, Yali LUO, Da-Lin ZHANG, Mingxin LI, Xinghua BAO, Jisong SUN, 2021: On the Diurnal Cycle of Heavy Rainfall over the Sichuan Basin during 10–18 August 2020, ADVANCES IN ATMOSPHERIC SCIENCES, 38, 2183-2200.  doi: 10.1007/s00376-021-1118-7
    [10] Ting WANG, Ke WEI, Jiao MA, 2021: Atmospheric Rivers and Mei-yu Rainfall in China: A Case Study of Summer 2020, ADVANCES IN ATMOSPHERIC SCIENCES, 38, 2137-2152.  doi: 10.1007/s00376-021-1096-9
    [11] Yating ZHAO, Ming XUE, Jing JIANG, Xiao-Ming HU, Anning HUANG, 2024: Assessment of Wet Season Precipitation in the Central United States by the Regional Climate Simulation of the WRFG Member in NARCCAP and Its Relationship with Large-Scale Circulation Biases, ADVANCES IN ATMOSPHERIC SCIENCES, 41, 619-638.  doi: 10.1007/s00376-023-2353-x
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    • Manuscript History

    Manuscript received: 10 September 2002
    Manuscript revised: 10 September 2002
    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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    Initiation Mechanism of Meso-β Scale Convective Systems

    • 1. Key Laboratory of Mesoscale Severe Weather, Ministry of Edueation, China ;Department of Atmospheric Science, Nanjing Institute of Meteorology, Nanjing, 210044,Department of Atmospherie Sciences, Nanjing University, Nanjing 210093,Department of Atmospherie Sciences, Nanjing University, Nanjing 210093
    • Manuscript received: 2002-09-10
    • Manuscript revised: 2002-09-10

    Abstract: With the aid of the Penn State-NCAR MM5 model, the initiation mechanism of meso-β scaleconvective systems (MCS) is investigated on the basis of simulation of the temporal and spatialthermodynamic structure of the MCS that occurred in Wuhan, Hubei, China and its surrounding area on 21July 1998. Using the PV inversion method, comparisons among the upper-, middle-, and low-leveltropospheric potential vorticity (PV) perturbations, as well as their effects on the initiation of MCS, indicatethat the low-level tropospheric PV perturbations play an important role in the triggering of MCS. Furtheranalysis reveals that the interaction between the southwest low-level jet and the gravity-inertia wave indeedinitiates MCS in the conditionally unstable ambient atmosphere.

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