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The Conservation of Helicity in Hurricane Andrew (1992) and the Formation of the Spiral Rainband


doi: 10.1007/BF02915517

  • The characteristics of helicity in a hurricane are presented by calculating the MM5 model output in addition to theoretical analysis. It is found that helicity in a hurricane mainly depends on its horizontal component, whose magnitude is about 100 to 1000 times larger than its vertical component. It is also found that helicity is approximately conserved in the hurricane. Since the fluid has the intention to adjust the wind shear to satisfy the conservation of helicity, the horizontal vorticity is even larger than the vertical vorticity, and the three-dimensional vortices slant to the horizontal plane except in the inner eye. There are significant horizontal vortices and inhomogeneous helical flows in the hurricane. The formation of the spiral rainband is discussed by using the law of horizontal helical flows. It is closely related to the horizontal strong vortices and inhomogeneous helical flows.
  • [1] ZHOU Lingli, ZHAI Guoqing, HE Bin, 2011: Numerical Study of the Mesoscale Systems in the Spiral Rainband of 0509 Typhoon Matsa, ADVANCES IN ATMOSPHERIC SCIENCES, 28, 118-128.  doi: 10.1007/s00376-010-0023-2
    [2] HAN Ying, WU Rongsheng, FANG Juan, 2006: Shearing Wind Helicity and Thermal Wind Helicity, ADVANCES IN ATMOSPHERIC SCIENCES, 23, 504-512.  doi: 10.1007/s00376-006-0504-5
    [3] Fei Shiqiang, Tan Zhemin, 2001: On the Helicity Dynamics of Severe Convective Storms, ADVANCES IN ATMOSPHERIC SCIENCES, 18, 67-86.  doi: 10.1007/s00376-001-0005-5
    [4] Ding Jincai, Dai Jianhua, Chen Yamin, Hu Fuquan, Tang Xinzhang, 1996: Helicity as a Method for Forecasting Severe Weather Events, ADVANCES IN ATMOSPHERIC SCIENCES, 13, 533-538.  doi: 10.1007/BF03342043
    [5] MING Jie, NI Yunqi, SHEN Xinyong, 2009: The Dynamical Characteristics and Wave Structure of Typhoon Rananim (2004), ADVANCES IN ATMOSPHERIC SCIENCES, 26, 523-542.  doi: 10.1007/s00376-009-0523-0
    [6] Tan Zhemin, Wu Rongsheng, 1994: Helicity Dynamics of Atmospheric Flow, ADVANCES IN ATMOSPHERIC SCIENCES, 11, 175-188.  doi: 10.1007/BF02666544
    [7] Ji Zhongzhen, Wang Bin, Zhao Ying, Yang Hongwei, 2002: Total Energy Conservation and the Symplectic Algorithm, ADVANCES IN ATMOSPHERIC SCIENCES, 19, 459-467.  doi: 10.1007/s00376-002-0079-8
    [8] WANG Qiang, ZHOU Weidong*, WANG Dongxiao, and DONG Danpeng, 2014: Ocean Model Open Boundary Conditions with Volume, Heat and Salinity Conservation Constraints, ADVANCES IN ATMOSPHERIC SCIENCES, 31, 188-196.  doi: 10.1007/s00376-013-2269-y
    [9] Liu Shida, Xin Guojun, Liu Shikuo, Liang Fuming, 2000: The 3D Spiral Structure Pattern in the Atmosphere, ADVANCES IN ATMOSPHERIC SCIENCES, 17, 519-524.  doi: 10.1007/s00376-000-0015-8
    [10] Shunwu ZHOU, Yue MA, Xuyang GE, 2016: Impacts of the Diurnal Cycle of Solar Radiation on Spiral Rainbands, ADVANCES IN ATMOSPHERIC SCIENCES, 33, 1085-1095.  doi: 10.1007/s00376-016-5229-5
    [11] HUANG Hong, JIANG Yongqiang, CHEN Zhongyi, LUO Jian, WANG Xuezhong, 2014: Effect of Tropical Cyclone Intensity and Instability on the Evolution of Spiral Bands, ADVANCES IN ATMOSPHERIC SCIENCES, 31, 1090-1100.  doi: 10.1007/s00376-014-3108-5
    [12] LI Qingqing, DUAN Yihong, YU Hui, FU Gang, 2010: Finescale Spiral Rainbands Modeled in a High-Resolution Simulation of Typhoon Rananim (2004), ADVANCES IN ATMOSPHERIC SCIENCES, 27, 685-704.  doi: 10.1007/s00376-009-9127-y
    [13] Wu Rongsheng, Fang Juan, 2001: Mechanism of Balanced Flow and Frontogenesis, ADVANCES IN ATMOSPHERIC SCIENCES, 18, 323-334.  doi: 10.1007/BF02919313
    [14] Zhang Fuqing, Steven E. Koch, Christopher A. Davis, 2000: A survey of Unbalanced Flow Diagnostics and Their Application, ADVANCES IN ATMOSPHERIC SCIENCES, 17, 165-183.  doi: 10.1007/s00376-000-0001-1
    [15] Fang Juan, Wu Rongsheng, 2002: Energetics of Geostrophic Adjustment in Rotating Flow, ADVANCES IN ATMOSPHERIC SCIENCES, 19, 845-854.  doi: 10.1007/s00376-002-0049-1
    [16] Wu Rongsheng, 1991: The Surface Friction and the Flow over Mountain, ADVANCES IN ATMOSPHERIC SCIENCES, 8, 272-278.  doi: 10.1007/BF02919609
    [17] Zhao Qiang, Fu Zuntao, Liu Shikuo, 2001: Equatorial Envelope Rossby Solitons in a Shear Flow, ADVANCES IN ATMOSPHERIC SCIENCES, 18, 418-428.  doi: 10.1007/BF02919321
    [18] Jae-Jin KIM, Do-Yong KIM, 2009: Effects of a Building's Density on Flow in Urban Areas, ADVANCES IN ATMOSPHERIC SCIENCES, 26, 45-56.  doi: 10.1007/s00376-009-0045-9
    [19] Tianju WANG, Zhong ZHONG, Ju WANG, 2018: Vortex Rossby Waves in Asymmetric Basic Flow of Typhoons, ADVANCES IN ATMOSPHERIC SCIENCES, 35, 531-539.  doi: 10.1007/s00376-017-7126-y
    [20] Zhao Ping, 1991: The Effects of Zonal Flow on Nonlinear Rossby Waves, ADVANCES IN ATMOSPHERIC SCIENCES, 8, 299-306.  doi: 10.1007/BF02919612

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Manuscript History

Manuscript received: 10 November 2003
Manuscript revised: 10 November 2003
通讯作者: 陈斌, bchen63@163.com
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The Conservation of Helicity in Hurricane Andrew (1992) and the Formation of the Spiral Rainband

  • 1. Department of Atmosphere Science, Nanjing University, Nanjing 210093;Key Laboratory of Mesoscale Severe Weather of Ministry of Education, China;Department of Geoscience, Zhejiang University, Hangzhou 310028,Department of Geoscience, Zhejiang University, Hangzhou 310028

Abstract: The characteristics of helicity in a hurricane are presented by calculating the MM5 model output in addition to theoretical analysis. It is found that helicity in a hurricane mainly depends on its horizontal component, whose magnitude is about 100 to 1000 times larger than its vertical component. It is also found that helicity is approximately conserved in the hurricane. Since the fluid has the intention to adjust the wind shear to satisfy the conservation of helicity, the horizontal vorticity is even larger than the vertical vorticity, and the three-dimensional vortices slant to the horizontal plane except in the inner eye. There are significant horizontal vortices and inhomogeneous helical flows in the hurricane. The formation of the spiral rainband is discussed by using the law of horizontal helical flows. It is closely related to the horizontal strong vortices and inhomogeneous helical flows.

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