| 有蒸发-风反馈和海-气相互作用的CISK开尔文波——热带季节内振荡机制的进一步研究 |
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| 作者姓名： | Li Chongyin Han-Ru Cho Jough-Tai Wang |
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| 作者单位： | Li ChongyinInstitute of Atmospheric Physics，Chinese Academy of Sciences，Beijing 100029Han-Ru Cho and Jough-Tai WangDepartment of Atmospheric Sciences，National Central University，Taibei 32057 |
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| 基金项目： | This study is partly supported by National Key Programme for Developing Basic Sciences(G1998040903) |
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| 摘 要： | 将波动－CISK（积云对流加热反馈）、海－气相互作用和蒸发－风反馈都引入一个简单理论模式，研究了他们在驱动热带大气季节内振荡（ISO）中的作用。其结果表明：波动－CISK在减慢激发波的位相速度以接近观测到的热带ISO的移速过程中起主要作用；而蒸发－风反馈的主要作用是使激发波不稳定；海－气相互作用在减慢激发波的移速方面也有一定作用。因此，波动－CISK和蒸发－风反馈可认为是热带ISO的主要动力学机制。本研究还表明，由于蒸发－风反馈和海－气相互作用的影响，激发波是一种频散波，这种频散性可以更好地解释热带大气中ISO的活动特征。
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| 关 键 词： | 季节内振荡 CISK开尔文波 蒸发－风反馈 海－气相互作用 热带大气 |
| 收稿时间： | 18 May 2001 |
CISK kelvin wave with evaporation-wind feedback and air-sea interaction-A further study of tropical intraseasonal oscillation mechanism |
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| Li Chongyin,Han-Ru Cho,Jough-Tai Wang.CISK kelvin wave with evaporation-wind feedback and air-sea interaction-A further study of tropical intraseasonal oscillation mechanism[J].Advances in Atmospheric Sciences,2002,19(3):379-390. |
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| Authors: | Chongyin Li Han-Ru Cho Jough-Tai Wang |
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| Institution: | Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,Department of Atmospheric Sciences, National Central University, Taibei 32057,Department of Atmospheric Sciences, National Central University, Taibei 32057 |
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| Abstract: | The wave-CISK (cumulus convection heating feedback), the air-sea interaction and the evaporation-wind feedback are together introduced into a simple theoretical model, in order to understand their effect on driving tropical atmospheric intraseasonal oscillation (ISO). The results showed that among the introduced dynamical processes the wave-CISK plays a major role in reducing phase speed of the wave to be closer to the observed tropical ISO. While the evaporation-wind feedback plays a major role in unstabilizing the wave. The air-sea interaction has certain effect on slowing down the phase speed of the wave. Therefore, the wave-CISK and evaporation-wind feedback can be regarded as fundamental dynamical mechanism of the tropical ISO. This study also shows that since the effects of the evaporation-wind feedback and the air-sea interaction were introduced, the excited wave is zonally dispersive, which can dynamically explain the activity feature of the observed ISO in the tropical atmosphere very well. |
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| Keywords: | Intraseasonal oscillation CISK Kelvin wave Evaporation-wind feedback Air-sea interaction |
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