| Oscillatory Rossby Solitary Waves in the Atmosphere |
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| 作者姓名： | Chen Zhongming Liu Fuming Li Xiaoping Tao Jie |
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| 作者单位： | Chen Zhonpoing;Liu Fuming(Chengdu Institute of Plateau Meteorology，Chengdu 610072)Li xiaoping and Tao Jie (Naming Institute of Meteorology，Nanjing 210044) |
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| 摘 要： | The linear Rossby wave frequency expression is expanded at higher accuracy based on the scale difference char?acteristics of atmospheric long waves in the and directions. That the nature of the waves represented by the expan?sion is identical to that of the original ones is demonstrated both in phase velocity and wave energy dispersion speed , followed by the derivation of the nonlinear expression describing atmospheric long wave behaviors with the associated approximate analytic solution obtained. Then, for the first time atmospheric’ oscillatory Rossby solitary wave’ with its dispersion relation is obtained by numerical calculation with the aid of physical parameters of the real atmosphere. The solitary wave is found to be very close to such longwave systems as blocking highs and cut-off de?pressions in the actual atmosphere.
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| 收稿时间： | 23 March 1993 |
Oscillatory Rossby solitary waves in the atmosphere |
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| Chen Zhongming,Liu Fuming,Li Xiaoping,Tao Jie.Oscillatory Rossby Solitary Waves in the Atmosphere[J].Advances in Atmospheric Sciences,1994,11(1):65-73. |
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| Authors: | Chen Zhongming Liu Fuming Li Xiaoping Tao Jie |
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| Institution: | Chengdu Institute of Plateau Meteorology, Chengdu 610072,Chengdu Institute of Plateau Meteorology, Chengdu 610072,Nanjing Institute of Meteorology, Nanjing 210044,Nanjing Institute of Meteorology, Nanjing 210044 |
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| Abstract: | The linear Rossby wave frequency expression is expanded at higher accuracy based on the scale difference characteristics of atmospheric long waves in the x and y directions. That the nature of the waves represented by the expansion is identical to that of the original ones is demonstrated both in phase velocity C and wave energy dispersion speed C., followed by the derivation of the nonlinear expression describing atmospheric long wave behaviors with the associated approximate analytic solution obtained. Then, for the first time atmospheric' oscillatory Rossby solitary wave with its dispersion relation is obtained by numerical calculation with the aid of physical parameters of the real atmosphere. The solitary wave is found to be very close to such longwave systems as blocking highs and cut-off depressions in the actual atmosphere. |
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| Keywords: | Longwave approximation Oscillatory Rossby solitary wave |
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