| APPLICATION OF ADVECTIVE VORTICITY EQUATION TO TYPHOON FUNG-WONG |
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| 作者姓名： | 周玉淑 朱科锋 刘黎平 |
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| 作者单位： | ZHOU Yu-shu,ZHU Ke-feng(Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 China);LIU Li-ping(State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081 China) |
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| 基金项目： | the Ministry of Sciences and Technology of the People's Republic of China，the Natural Science Foundation of China，State Key Laboratory of Severe Weather |
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| 摘 要： | The momentum advection vorticity equation in the form of cross multiplication is introduced, in
which the divergence term in the classic vorticity equation does not appear explicitly. This equation
includes the rotation effect of the horizontal wind advection, which are not explicitly included in the classic
vorticity equation. The vorticity and its tendency of Typhoon Fung-Wong (0808) that occurred in July 2008
are analyzed. The computed results show that the rotation effect of the advection of the horizontal wind is a
leading factor in determining the change of vertical vorticity for Fung-Wong during its life cycle, especially
in the period leading up to landfall. The advection term represents the tendency variation of the vertical
vorticity, and the positive-value region of the vertical vorticity tendency is almost in accord with the track
of Fung-Wong, which may be taken as a factor to locate the key observational region of Fung-Wong. The
equation provides a supplementary diagnostic tool for the systems related with strong advection of
horizontal wind.
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APPLICATION OF ADVECTIVE VORTICITY EQUATION TO TYPHOON FUNG-WONG |
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| YU Zi-feng,YU Hui and GAO Shou-ting.APPLICATION OF ADVECTIVE VORTICITY EQUATION TO TYPHOON FUNG-WONG[J].Journal of Tropical Meteorology,2010,16(2):134-142. |
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| Authors: | YU Zi-feng YU Hui and GAO Shou-ting |
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| Institution: | 1. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 China
2. State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081 China |
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| Abstract: | The momentum advection vorticity equation in the form of cross multiplication is introduced, in which the divergence term in the classic vorticity equation does not appear explicitly. This equation includes the rotation effect of the horizontal wind advection, which are not explicitly included in the classic vorticity equation. The vorticity and its tendency of Typhoon Fung-Wong (0808) that occurred in July 2008 are analyzed. The computed results show that the rotation effect of the advection of the horizontal wind is a leading factor in determining the change of vertical vorticity for Fung-Wong during its life cycle, especially in the period leading up to landfall. The advection term represents the tendency variation of the vertical vorticity, and the positive-value region of the vertical vorticity tendency is almost in accord with the track of Fung-Wong, which may be taken as a factor to locate the key observational region of Fung-Wong. The equation provides a supplementary diagnostic tool for the systems related with strong advection of horizontal wind. |
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| Keywords: | advection vorticity equation synoptic analysis |
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