Numerical modeling of non-linear characteristics for barotropic atmosphere with external forcing
文献类型：期刊论文
| 作者 | Wang, P; Dai, XG |
| 刊名 | Acta physica sinica
 |
| 出版日期 | 2005-10-01 |
| 卷号 | 54期号:10页码:4961-4970 |
| 关键词 | Barotropic atmosphere Thermal forcing Topography Oscillated solution Quasi-periodic oscillation |
| ISSN号 | 1000-3290 |
| 通讯作者 | Wang, p(pwang@mail.iap.ac.cn) |
| 英文摘要 | Some characteristics of barotropic atmosphere are illustrated by numerical modeling, basing on a potential vorticity equation with forcing, dissipation, and non-linear interaction. for the barotropic potential vorticity equation (named the barotrupic model) on a beta-plane channel its solution is a stationary, wave-like pattern under a certain thermal forcing. while a quasi-periodic oscillation between two essential flow patterns appears if north-south thermal heating and wave-like topography are added as the model forcing. the oscillation has a period about 15d, very similar to atmospheric index cycle in middle and high latitudes. the low-index pattern corresponds to a blocking flow, whereas the high index one is an intensive westerly flow. more oscillation solutions are expected when the equation is under periodic boundary condition with a strong thermal forcing, and a similar quasiperiodic solution can be obtained, which also results from a wave topography forcing. however, its low index pattern is symmetrical. and different front the blocking pattern produced by the beta-plane model, when the heating forcing becomes weak, there also exists a stationary solution. therefore, the characteristics of atmospheric index cycle may not be soundly manifested by an analytical solution or numerical solution under periodic boundary condition using low-order spectrum method that approximates the barotropic model in the beta-plane channel. |
| WOS关键词 | INSTABILITY ; EQUILIBRIA |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000232443100087 |
| 出版者 | CHINESE PHYSICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2377431 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Wang, P |
| 作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, P,Dai, XG. Numerical modeling of non-linear characteristics for barotropic atmosphere with external forcing[J]. Acta physica sinica,2005,54(10):4961-4970. |
| APA | Wang, P,&Dai, XG.(2005).Numerical modeling of non-linear characteristics for barotropic atmosphere with external forcing.Acta physica sinica,54(10),4961-4970. |
| MLA | Wang, P,et al."Numerical modeling of non-linear characteristics for barotropic atmosphere with external forcing".Acta physica sinica 54.10(2005):4961-4970. |
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来源：中国科学院大学
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