The Structure and Bifurcation of Atmospheric Motions

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.

作 者： 劉式適 劉式達(dá) 付遵濤 辛國君 梁福明   作者單位： 劉式適,辛國君,梁福明(School of Physics, Peking University, Beijing 100871)

劉式達(dá),付遵濤(School of Physics, Peking University, Beijing 100871;State Key Laboratory for Turbulence and Complex Systems, Peking University, Beijing 100871) 

刊 名： 大氣科學(xué)進(jìn)展(英文版)  ISTIC SCI 英文刊名： ADVANCES IN ATMOSPHERIC SCIENCES  年，卷(期)： 2004 21(4)  分類號(hào)：   關(guān)鍵詞： horizontal divergence   vertical vorticity   spiral structure   bifurcation  

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