| THE FOUNDATION AND MOVEMENT OF TROPICAL SEMI-GEOSTROPHIC ADAPTATION |
| |
| 作者姓名： | Chao Jiping Lin Yonghui |
| |
| 作者单位： | National Research Center for Marine Environment Forecasts Beijing 100081，Institute of Atmospheric Physics，Chinese Academy of Sciences，Beijing 100029 |
| |
| 摘 要： | The breakdown and foundation of geostrophic balance is one of the important movements inthe mid-and high-latitude atmosphere and oceans.In the tropical area,the value of Coriolis pa-rameter is so small that it is difficult to satisfy the bi-geostrophic equilibrium between the pressureand velocity fields.However,in the tropical area,the zonal velocity of some motions in the atmo-sphere and oceans is large,so the Coriolis force is not small,geostrophic balance can exist in zonaldirection,i.e.semi-geostrophic balance.Furthermore,in the dominant area of Hadley circulationin the atmosphere or the area near the ocean meridional boundary,the meridional velocity is large,so geostrophic balance can also exist in meridional direction.In this paper,the process of the dis-persion of inertial gravity wave and the foundation of semi-geostrophic balance are first discussed.Second,the adjustment process between the velocity and pressure fields after adaptation is alsoviewed,and the scale criterion of the semi-geostrophic adaptation is discussed,i.e.for the motionwith meridional scale greater than the equatorial Rossby radius of deformation,the velocity andpressure fields after adaptation change to fit the initial pressure field;on the contrary,the fieldschange to fit the initial zonal velocity field,and the strength of the fields after adaptation dependson the zonal scale.
|
| 收稿时间： | 1995/7/18 0:00:00 |
| 修稿时间： | 1995/10/24 0:00:00 |
THE FOUNDATION AND MOVEMENT OF TROPICAL SEMI-GEOSTROPHIC ADAPTATION |
| |
| Chao Jiping,Lin Yonghui.THE FOUNDATION AND MOVEMENT OF TROPICAL SEMI-GEOSTROPHIC ADAPTATION[J].Acta Meteorologica Sinica,1996,10(2):129-141. |
| |
| Authors: | Chao Jiping and Lin Yonghui |
| |
| Institution: | Chao Jiping National Research Center for Marine Environment Forecasts,Beijing 100081
Lin Yonghui Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029 |
| |
| Abstract: | The breakdown and foundation of geostrophic balance is one of the important movements in the mid-and high-latitude atmosphere and oceans.In the tropical area,the value of Coriolis pa- rameter is so small that it is difficult to satisfy the bi-geostrophic equilibrium between the pressure and velocity fields.However,in the tropical area,the zonal velocity of some motions in the atmo- sphere and oceans is large,so the Coriolis force is not small,geostrophic balance can exist in zonal direction,i.e.semi-geostrophic balance.Furthermore,in the dominant area of Hadley circulation in the atmosphere or the area near the ocean meridional boundary,the meridional velocity is large, so geostrophic balance can also exist in meridional direction.In this paper,the process of the dis- persion of inertial gravity wave and the foundation of semi-geostrophic balance are first discussed. Second,the adjustment process between the velocity and pressure fields after adaptation is also viewed,and the scale criterion of the semi-geostrophic adaptation is discussed,i.e.for the motion with meridional scale greater than the equatorial Rossby radius of deformation,the velocity and pressure fields after adaptation change to fit the initial pressure field;on the contrary,the fields change to fit the initial zonal velocity field,and the strength of the fields after adaptation depends on the zonal scale. |
| |
| Keywords: | dispersion of inertial gravity wave semi-geostrophic adaptation scale criterion |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《Acta Meteorologica Sinica》浏览原始摘要信息 |
| 点击此处可从《Acta Meteorologica Sinica》下载免费的PDF全文 |
|
