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Volume 21 Issue 4

Jul.  2004

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Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2004 >  21(4): 557-561

The Structure and Bifurcation of Atmospheric Motions

  • 1.

    School of Physics, Peking University, Beijing 100871,School of Physics, Peking University, Beijing 100871;State Key Laboratory for Turbulence and Complex Systems, Peking University, Beijing 100871,School of Physics, Peking University, Beijing 100871;State Key Laboratory for Turbulence and Complex Systems, Peking University, Beijing 100871,School of Physics, Peking University, Beijing 100871,School of Physics, Peking University, Beijing 100871


doi: 10.1007/BF02915723

  • The 3-D spiral structure resulting from the balance between the pressure gradient force, Coriolis force, and viscous force is a common atmospheric motion pattern. If the nonlinear advective terms are considered, this typical pattern can be bifurcated. It is shown that the surface low pressure with convergent cyclonic vorticity and surface high pressure with divergent anticyclonic vorticity are all stable under certain conditions. The anomalous structure with convergent anticyclonic vorticity is always unstable. But the anomalous weak high pressure structure with convergent cyclonic vorticity can exist, and this denotes the cyclone's dying out.
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    • Manuscript History

    Manuscript received: 10 July 2004
    Manuscript revised: 10 July 2004
    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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    The Structure and Bifurcation of Atmospheric Motions

    • 1. School of Physics, Peking University, Beijing 100871,School of Physics, Peking University, Beijing 100871;State Key Laboratory for Turbulence and Complex Systems, Peking University, Beijing 100871,School of Physics, Peking University, Beijing 100871;State Key Laboratory for Turbulence and Complex Systems, Peking University, Beijing 100871,School of Physics, Peking University, Beijing 100871,School of Physics, Peking University, Beijing 100871
    • Manuscript received: 2004-07-10
    • Manuscript revised: 2004-07-10

    Abstract: The 3-D spiral structure resulting from the balance between the pressure gradient force, Coriolis force, and viscous force is a common atmospheric motion pattern. If the nonlinear advective terms are considered, this typical pattern can be bifurcated. It is shown that the surface low pressure with convergent cyclonic vorticity and surface high pressure with divergent anticyclonic vorticity are all stable under certain conditions. The anomalous structure with convergent anticyclonic vorticity is always unstable. But the anomalous weak high pressure structure with convergent cyclonic vorticity can exist, and this denotes the cyclone's dying out.

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