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Volume 2 Issue 2

Apr.  1985

Article Contents

A NUMERICAL EXPERIMENTAL STUDY OF SOME DYNAMICAL EFFECTS ON SOUTHERN ASIATIC HIGH


doi: 10.1007/BF03179746

  • Using a barotropic, steady and linearized vorticity equation and using 250 hPa observed basic flow and global divergence field from the active summer monsoon phase (00 GMT 26 June-12 GMT 29 June) 1979, the dynamical effects of linear absolute vorticity advection, vorticity generation due to divergence and vorticity dissipation due to frictional damping have been tested to understand their influence on Southern Asiatic High (SAH). The key experimental results are: (1) The SAH, one of the major planetary-scale disturbances, is generated from the upper basic flow by the forcing of the upper tropospheric divergence over southeast Asia during the active summer monsoon phase. (2) Linear absolute vorticity advection and frictional damping of vorticity play an important role in the determination of the location of the SAH. (3) The destruction and recovery of planetary-scale geostrophic balance is an important mechanism for the west-east oscillation of the SAH.
  • [1] Zhang Ren, Yu Zhihao, 2000: Numerical and Dynamical Analyses of Heat Source Forcing and Restricting Subtropical High Activity, ADVANCES IN ATMOSPHERIC SCIENCES, 17, 61-71.  doi: 10.1007/s00376-000-0043-4
    [2] Zheng Weizhong, Ni Yunqi, 1999: A Numerical Experiment Study for Effects of the Grassland Desertification on Summer Drought in North China, ADVANCES IN ATMOSPHERIC SCIENCES, 16, 251-262.  doi: 10.1007/BF02973086
    [3] JIANG Yujun, LIU Huizhi, SANG Jianguo, ZHANG Boyin, 2007: Numerical and Experimental Studies on Flow and Pollutant Dispersion in Urban Street Canyons, ADVANCES IN ATMOSPHERIC SCIENCES, 24, 111-125.  doi: 10.1007/s00376-007-0111-0
    [4] Chen Ruirong, 1985: AN EXPERIMENTAL STUDY ON THE DRAG EFFECT OF PRECIPITATING PARTICLES ON FLUID MOTION, ADVANCES IN ATMOSPHERIC SCIENCES, 2, 35-44.  doi: 10.1007/BF03179735
    [5] He Jinhai, Zhou Xueming, Ye Rongsheng, 1995: Numerical Study of Ural Blocking High’s Effect Upon Asian Summer Monsoon Circulation and East China Flood and Drought, ADVANCES IN ATMOSPHERIC SCIENCES, 12, 361-370.  doi: 10.1007/BF02656985
    [6] ZHOU Yang, JIANG Jing, Youyu LU, and HUANG Anning, 2013: Revealing the effects of the El Nio-Southern oscillation on tropical cyclone intensity over the western North Pacific from a model sensitivity study, ADVANCES IN ATMOSPHERIC SCIENCES, 30, 1117-1128.  doi: 10.1007/s00376-012-2109-5
    [7] Zeng Xinmin, Zhao Ming, Su Bingkai, 2000: A Numerical Study on Effects of Land-Surface Heterogeneity from “Combined Approach” on Atmospheric Process Part I: Principle and Method, ADVANCES IN ATMOSPHERIC SCIENCES, 17, 103-120.  doi: 10.1007/s00376-000-0047-0
    [8] Li Guoqing, Robin Kung, Richard L. Pfeffer, 1993: Some Effects of Rotation Rate on Planetary-Scale Wave Flows, ADVANCES IN ATMOSPHERIC SCIENCES, 10, 296-306.  doi: 10.1007/BF02658135
    [9] Qian Zhengan, Rod. A. Bromley, Mike. A. Ayles, 1991: Some Analyses and Numerical Simulations of Meiyu in East Asia in 1983, ADVANCES IN ATMOSPHERIC SCIENCES, 8, 67-78.  doi: 10.1007/BF02657365
    [10] Zeng Xinmin, Zhao Ming, Su Bingkai, 2000: A Numerical Study on Effects of Land-Surface Heterogeneity from ‘Combined Approach’ on Atmospheric Process Part II: Coupling-Model Simulations, ADVANCES IN ATMOSPHERIC SCIENCES, 17, 241-255.  doi: 10.1007/s00376-000-0007-8
    [11] Shaoying LI, Jun PENG, Weimin ZHANG, Jianping WU, Qiang YAO, Xiangrong YANG, Tengling LUO, 2023: Effects of a Dry-Mass Conserving Dynamical Core on the Simulation of Tropical Cyclones, ADVANCES IN ATMOSPHERIC SCIENCES, 40, 464-482.  doi: 10.1007/s00376-022-2085-3
    [12] Song Yucheng, Huang Ronghui, 1995: The Dynamical Effects of Divergent Wind on the Intraseasonal Variability of the East Asian Circulation, ADVANCES IN ATMOSPHERIC SCIENCES, 12, 259-272.  doi: 10.1007/BF02656976
    [13] Chen Panqin, Yan Zhongwei, 1993: Some Preliminary Results on Pilot Study of Global Change in China, ADVANCES IN ATMOSPHERIC SCIENCES, 10, 201-210.  doi: 10.1007/BF02919142
    [14] LIU Ximing, CHENG Xueling, WU Qiong, FU Minning, ZENG Qingcun, 2013: Some Characteristics of the Surface Boundary Layer of a Strong Cold Air Process over Southern China, ADVANCES IN ATMOSPHERIC SCIENCES, 30, 210-218.  doi: 10.1007/s00376-012-1223-8
    [15] Qiu Jinhuan, Wang Hongqi, Zhou Xiuji, Lu Daren, 1985: EXPERIMENTAL STUDY OF REMOTE SENSING OF ATMOSPHERIC AEROSOL SIZE DISTRIBUTION BY COMBINED SOLAR EXTINCTION AND FORWARD SCATTERING METHOD, ADVANCES IN ATMOSPHERIC SCIENCES, 2, 307-315.  doi: 10.1007/BF02677246
    [16] Guo Yufu, Chao Jiping, 1984: SIMPLIFIED DYNAMICAL ANOMALY MODEL FOR LONG-RANGE NUMERICAL FORECASTS, ADVANCES IN ATMOSPHERIC SCIENCES, 1, 30-52.  doi: 10.1007/BF03187614
    [17] MA Hao, WU Lixin, LI Chun, 2010: The Role of Southern High Latitude Wind Stress in Global Climate, ADVANCES IN ATMOSPHERIC SCIENCES, 27, 371-381.  doi: 10.1007/s00376-009-9047-x
    [18] Chen Panqin, 1985: NUMERICAL SIMULATION FOR THE EFFECTS OF PBL AND THE SURFACE ON POLLUTANT CONCENTRATIONS, ADVANCES IN ATMOSPHERIC SCIENCES, 2, 251-259.  doi: 10.1007/BF03179757
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Manuscript History

Manuscript received: 10 April 1985
Manuscript revised: 10 April 1985
通讯作者: 陈斌, bchen63@163.com
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A NUMERICAL EXPERIMENTAL STUDY OF SOME DYNAMICAL EFFECTS ON SOUTHERN ASIATIC HIGH

  • 1. Department of Geography, Hangzhou University, Hangzhou,Department of Meteorology, Space Science and Engineering Center, University of Wisconsin, Madison, Wisconsin, U.S.A.

Abstract: Using a barotropic, steady and linearized vorticity equation and using 250 hPa observed basic flow and global divergence field from the active summer monsoon phase (00 GMT 26 June-12 GMT 29 June) 1979, the dynamical effects of linear absolute vorticity advection, vorticity generation due to divergence and vorticity dissipation due to frictional damping have been tested to understand their influence on Southern Asiatic High (SAH). The key experimental results are: (1) The SAH, one of the major planetary-scale disturbances, is generated from the upper basic flow by the forcing of the upper tropospheric divergence over southeast Asia during the active summer monsoon phase. (2) Linear absolute vorticity advection and frictional damping of vorticity play an important role in the determination of the location of the SAH. (3) The destruction and recovery of planetary-scale geostrophic balance is an important mechanism for the west-east oscillation of the SAH.

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