| 大气能量传播及不同纬度间大气相互作用的研究进展 |
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| 引用本文： | 杨崧,邓开强,TING Mingfang,胡春迪.大气能量传播及不同纬度间大气相互作用的研究进展[J].Acta Meteorologica Sinica,2015,73(6):999-1018. |
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| 作者姓名： | 杨崧 邓开强 TING Mingfang 胡春迪 |
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| 作者单位： | 中山大学大气科学系, 广州, 510275;中山大学地球气候与环境系统研究院, 广州, 510275,中山大学大气科学系, 广州, 510275;中山大学地球气候与环境系统研究院, 广州, 510275,Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, USA,南京大学大气科学学院, 南京, 210023 |
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| 基金项目： | 国家重大科学研究计划(2014cb953900)、国家自然科学基金(41375081)。 |
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| 摘 要： | 早期的理论分析认为大气中临界纬度的存在使得热带-热带外的大气活动互不影响。然而,大量的观测事实表明中低纬度大气运动存在着明显的动力联系。为了帮助人们更好地理解大气中的遥相关现象,在大量文献的基础上,综述了几种波能量传播理论:(1) 大圆理论指出了罗斯贝波在球形大气中的传播特征;(2) 西风通道理论发现了中纬度瞬变扰动越赤道传播的“走廊”;(3) 能量堆积-波列发射理论揭示了热带扰动影响到更高纬度大气活动的可能过程;(4) 赤道波侧向膨胀理论则利用转折纬度的概念更进一步解释了这种中低纬度大气相互作用的物理机制;(5) 经向基本流理论则认为在一定的条件下定常波可以穿过热带东风带传播到另一半球。此外,文中还回顾了在波-流相互作用诊断方面的研究进展,尤其是关于罗斯贝波、惯性重力波和赤道开尔文波。大气能量的经向传播具有显著的年变化和年际变化,这与ENSO、西风急流、大洋中部槽等的变化密切相关。
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| 关 键 词： | 大圆路径 西风通道 能量堆积 波膨胀 经向基本流 |
| 收稿时间： | 5/8/2015 12:00:00 AM |
| 修稿时间： | 8/5/2015 12:00:00 AM |
Advances in the atmospheric energy propagation and atmospheric interactions between the different latitudes |
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| YANG Song,DENG Kaiqiang,TING Mingfang and HU Chundi.Advances in the atmospheric energy propagation and atmospheric interactions between the different latitudes[J].Acta Meteorologica Sinica,2015,73(6):999-1018. |
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| Authors: | YANG Song DENG Kaiqiang TING Mingfang and HU Chundi |
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| Institution: | Department of Atmospheric Sciences, Sun Yat-sen University, Guangzhou 510275, China;Institute of Earth Climate and Environment System, Sun Yat-sen University, Guangzhou 510275, China,Department of Atmospheric Sciences, Sun Yat-sen University, Guangzhou 510275, China;Institute of Earth Climate and Environment System, Sun Yat-sen University, Guangzhou 510275, China,Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964, USA and School of Atmospheric Sciences, Nanjing University, Xianlin Campus, Nangjing 210023, China |
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| Abstract: | Previous theoretical analyses have indicated that the tropics and the extratropics are relatively independent from each other due to the existence of the critical latitudes. However, a large number of observational evidences have shown that there exists an obvious dynamical linkage between the tropics and the mid-latitudes. To help people better understand the atmospheric teleconnections, several theories of wave energy propagation are reviewed based on large number of literatures. It is shown that: (1) The great circle theory reveals the characteristics of Rossby waves propagating in the spherical atmosphere; (2) the westerly duct theory suggests a "corridor" through which the mid-latitude disturbances in one hemisphere can propagate into the other hemisphere; (3) the theory of energy accumulation-wave emanation proposes the possible processes about how tropical disturbances affect the atmospheric motions in the higher latitudes; (4) the theory of wave swelling further explains the physical mechanism for tropical-extratropical interaction, and (5) the meridional basic flow theory argues that stationary waves can propagate across the tropical easterlies under certain conditions. Besides, the advances in diagnostics of wave-flow interaction, particularly for the Rossby wave, the inertial-gravity wave, and the Kelvin wave, are also reviewed. The meridional propagation of atmospheric energy exhibits significant annual and interannual variations, which are closely related with the ENSO events and variations of the westerly jets, tropical upper-troposphere troughs, and others. |
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| Keywords: | Great circle path Westerly duct Energy accumulation Wave swelling Meridional basic flow |
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