| SPATIAL AND TEMPORAL VARIATIONS OF THE KINEMATIC CHARACTERISTICS IN THE PROPAGATION OF ATMOSPHERIC STATIONARY WAVES |
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| 作者姓名： | Wu Guoxiong Chen Biao Wu Zhengxian |
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| 作者单位： | Institute of Atmospneric Physics Academia Sinica，Beijing，Permanent affiliation:Department of Meteorology，Nanjing Institute of Meteorology，Nanjing.，Institute of Atmospneric Physics，Academia Sinica，Beijing |
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| 摘 要： | Time-mean global general circulation data are employed to analyze the temporal and spatial variations ofthe meridional gradient of zonal mean potential vorticity,the critical wavenumber n_s for horizontal wave-propagation,and the critical wavenumber K_c for vertical wave-propagation.Thereby the kinematic charac-teristics in the propagation of atmospheric stationary waves and their annual variations are studied.Resultsshow that in the troposphere n_s and K_c usually decrease with the increase of either latitude or altitude.Synoptic and near-resonant Rossby waves could be trapped during their upward and meridional propagations.These characteristics possess prominent annual variations,especially in the Northern Hemisphere.It is foundthat the spatial and temporal variations of these kinematic characteristics are in good agreement with those ofthe atmospheric wave patterns.
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| 收稿时间： | 1989/10/9 0:00:00 |
SPATIAL AND TEMPORAL VARIATIONS OF THE KINEMATIC CHARACTERISTICS IN THE PROPAGATION OF ATMOSPHERIC STATIONARY WAVES |
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| Wu Guoxiong,Chen Biao,Wu Zhengxian.SPATIAL AND TEMPORAL VARIATIONS OF THE KINEMATIC CHARACTERISTICS IN THE PROPAGATION OF ATMOSPHERIC STATIONARY WAVES[J].Acta Meteorologica Sinica,1990,4(4):440-452. |
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| Authors: | Wu Guoxiong Chen Biao and Wu Zhengxian |
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| Institution: | LASG, Institute of Atmospneric Physics, Academia Sinica, Beijing Laboratory of Numerical Modelling for Atmospheric Sciences and Geophysical Fluid Dynamics;LASG, Institute of Atmospneric Physics, Academia Sinica, Beijing Laboratory of Numerical Modelling for Atmospheric Sciences and Geophysical Fluid Dynamics;LASG, Institute of Atmospneric Physics, Academia Sinica, Beijing Laboratory of Numerical Modelling for Atmospheric Sciences and Geophysical Fluid Dynamics |
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| Abstract: | Time-mean global general circulation data are employed to analyze the temporal and spatial variations of the meridional gradient of zonal mean potential vorticity,the critical wavenumber ns for horizontal wave-propagation,and the critical wavenumber Kc for vertical wave-propagation.Thereby the kinematic characteristics in the propagation of atmospheric stationary waves and their annual variations are studied.Results show that in the troposphere ns and Kc usually decrease with the increase of either latitude or altitude.Synoptic and near-resonant Rossby waves could be trapped during their upward and meridional propagations.These characteristics possess prominent annual variations,especially in the Northern Hemisphere.It is found that the spatial and temporal variations of these kinematic characteristics are in good agreement with those of the atmospheric wave patterns. |
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