| 对流层强迫与平流层暴发性增温 |
| |
| 引用本文： | 胡雄,张训械.对流层强迫与平流层暴发性增温[J].地球物理学报,1996,39(2):169-177. |
| |
| 作者姓名： | 胡雄 张训械 |
| |
| 作者单位： | 中国科学院武汉物理研究所, 武汉 430071 |
| |
| 摘 要： | 采用平流层准地转－β通道近似下的波流相互作用模型，考虑大气行星波１和波２与流的相互作用，以平流层底部边界强迫波波１和波２的振幅作为参数，对该模型的分岔特性进行了研究．结果表明，系统具有稳态解支Ａ，Ｂ，Ｃ，在某些参数范围内，多种稳态解同时存在．解支Ａ对应于平流层冷冬状态，解支Ｃ对应于平流层增温状态．由于参数变化系统在稳态解Ａ和Ｃ之间发生灾变是冬季平流层暴发性增温的原因．文中给出了二维参数空间中的分岔集，它表明了对流层顶的波动对平流层暴发性增温的控制作用，能很好地解释观测事实．
|
| 关 键 词： | 波流相互作用 分岔集 平流层暴发性增温 |
TROPOSPHERIC FORCINGS AND STRATOSPHERIC SUDDEN WARMINGS |
| |
| HU XIONG, ZHANG XUN-JIE, HUANG XIN-YU.TROPOSPHERIC FORCINGS AND STRATOSPHERIC SUDDEN WARMINGS[J].Chinese Journal of Geophysics,1996,39(2):169-177. |
| |
| Authors: | HU XIONG ZHANG XUN-JIE HUANG XIN-YU |
| |
| Institution: | Wuhan Institute of Physics, Academia Sinica, Wuhan 430071, China |
| |
| Abstract: | The bifurcation properties of a stratospheric vacillation model, which describethe interactios among planetary wave 1, planetary wave 2 and mean flow in a quasigeostrophic and β-channel approximation, are investigated. The amplitudes of forcing wave 1 and forcing wave 2 at the bottom boundary are taken as bifurcation parameters. Results show that there exist multi-equilibria within some parameter ranges and the jump between steady solutions due to changes of parameters, might be an explanation of the stratospheric sudden warmings. The presented bifurcation set in the two parameter space shows the control rolls of forcing waves at the tropespheric pause on the Sudden Stratospheric Warmings and provides a way to interpret planetary wave 1 warmings and planetary wave 2 warmings. |
| |
| Keywords: | Wave-mean flow interactions Bifurcation set Sudden stratospheric warmings |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《地球物理学报》浏览原始摘要信息 |
| 点击此处可从《地球物理学报》下载免费的PDF全文 |
|
