| 热带大气中30～60天低频振荡的CISK-Rossby波理论 |
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| 引用本文： | 罗德海. 热带大气中30～60天低频振荡的CISK-Rossby波理论[J]. 成都信息工程学院学报, 1993, 0(4) |
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| 作者姓名： | 罗德海 |
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| 作者单位： | 成都气象学院研究所 |
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| 摘 要： | 本文根据低纬热带大气中的风压场平衡关系对CISK-Rossby波进行了研究,指出对于弱对流加热,CISK-Rossby波既可以向东西方向传播,又可以向南北方向传播,并且这种弱对流加热所激发的CISK-Rossby波是一种稳定的减幅波;对于强对流加热,这种CISK-Rossby波减速并向东和向北传播,其传播特征与30～60天低频振荡的特征比较一致,并且这种CISK-Rossby波又是一种不稳定的增幅波,在10°N和17°N地区,经向波长为6000km的CISK-Rossby波的e倍增幅时间分别为6天和8天。因此,CISK-Rossby波可能是30～60天低频振荡的触发机制。
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| 关 键 词： | 热带大气 CISK-Rossby波 低频振荡 |
ROSSBY WAVE-CISK THEORY OF 30-60 DAY LOW FREQUENCY OSCILLATIONS IN THE TROPICAL ATMOSPHERE |
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| Luo Dehai. ROSSBY WAVE-CISK THEORY OF 30-60 DAY LOW FREQUENCY OSCILLATIONS IN THE TROPICAL ATMOSPHERE[J]. Journal of Chengdu University of Information Technology, 1993, 0(4) |
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| Authors: | Luo Dehai |
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| Abstract: | In this paper,Rossby wave-CISK near the equator is investigated according to the wind-pressure field balance relation. It is found that Rossby wave-CISK modes not only propagate in the west-east direction,but also in the north-south direction for the weak cumulus convective heating and the modes are a kind of decayed waves; For the strong convective heating,Rossby wave-CISK modes propagate slowly eastward and northward respectively , which characters are in a good agreement with the properties of 30-60 day Low frequency oscillations. This shows that Rossby wove-CISK may be a possible mechanism for exciting 30-60 low frequency oscillations in the tropical atmosphere. |
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| Keywords: | Tropical atmosphere Kossby wave-CISK Low frequency oscillations. |
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