| 地球大气行星波的螺旋结构 |
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| 引用本文： | 刘式适,杨大升.地球大气行星波的螺旋结构[J].气象学报,1979,37(1):14-27. |
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| 作者姓名： | 刘式适 杨大升 |
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| 作者单位： | 北京大学地球物理系
(刘式适)，北京大学地球物理系(杨大升) |
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| 摘 要： | 本文从描写大气大尺度运动的动力方程组出发,讨论了地球大气行星波的螺旋结构,给出了这种螺旋结构的“宏图”,指出:(1)螺旋状的行星波在整个大气三度空间都存在;(2)准水平面上的行星波是对数螺旋结构,这种行星波在垂直方向上也呈对数螺旋分布;(3)螺旋行星波存在一个相速条件(即存在范围),它的形状与波位相速紧密相关,而且它有频散作用;(4)螺旋波的形成,主要由于南北方向和垂直方向空气的较差转动及Coriolis参数随纬度的变化。
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| 收稿时间： | 1978/8/15 0:00:00 |
THE SPIRAL STRUCTURE OF THE PLANETARY WAVES IN THE EARTH ATMOSPHERE |
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| Liu Shi-koa and Yang Da-sheng.THE SPIRAL STRUCTURE OF THE PLANETARY WAVES IN THE EARTH ATMOSPHERE[J].Acta Meteorologica Sinica,1979,37(1):14-27. |
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| Authors: | Liu Shi-koa and Yang Da-sheng |
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| Institution: | Department of Geophysics, Peking University;Department of Geophysics, Peking University |
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| Abstract: | Frum the system of dynamic equations describing the large scale motion of the atmosphere, the "Grand Picture" of the spiral structure of the planetary wave in the earth atmosphere is obtained and discussed. The spiral structure of the planetary wave is three dimensional. It shows logarithmic distribution both along the meridional and vertical directions. There exists a phase speed condition for the spiral planetary waves. The structure of the spiral planetary waves depends on the phase speed of the waves. The spiral planetary waves are dispersive. The formation of the spiral planetary waves is mainly due to the differential rotation along the meridional and vertical directions, and the variation of Coriolis parameter with latitude. |
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