| 大气定常波传播的运动学特征的时空变化 |
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| 引用本文： | 吴国雄,陈彪,吴正贤.大气定常波传播的运动学特征的时空变化[J].气象学报,1990,48(1):36-45. |
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| 作者姓名： | 吴国雄 陈彪 吴正贤 |
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| 作者单位： | 大气科学和地球流体力学研究实验室(LASG)，中国科学院大气物理研究所 南京市浦口南京气象学院气象系 |
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| 摘 要： | 利用时间平均全球大气环流资料,本文计算了纬向平均位涡的南北梯度的时空分布,以及波动水平传播的临界波数n_s,和垂直传播的临界波数K_c的时空分布。由此研究全球大气定常波传播的运动学特征及其年变化。
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| 收稿时间： | 1/4/1989 12:00:00 AM |
SPAC1AL AND TEMPERAL VARIATION OF THE KINEMATIC CHARACTERISTICS FOR THE PROPAGATION OF ATMOSPHERIC STATIONARY WAVES |
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| Wu Guoxiong,Chen Biao and Wu Zhengxian.SPAC1AL AND TEMPERAL VARIATION OF THE KINEMATIC CHARACTERISTICS FOR THE PROPAGATION OF ATMOSPHERIC STATIONARY WAVES[J].Acta Meteorologica Sinica,1990,48(1):36-45. |
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| Authors: | Wu Guoxiong Chen Biao and Wu Zhengxian |
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| Institution: | LASG, Institute of Atmospheric Physics, Academia Sinica, Beijing, China;LASG, Institute of Atmospheric Physics, Academia Sinica, Beijing, China;LASG, Institute of Atmospheric Physics, Academia Sinica, Beijing, China |
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| Abstract: | Time-mean global general circulation data are employed to analyse the temperal and spatial variation of the meridional gradient of zonal mean poten-tial vorticity, the critical wave number nc for horizontal wave-propagation, and the critical wave number Kc for vertical wave-propagation. Thereby the kinematic characteristics for the propagation of atmospheric stationary waves and their annual variations are studied. Results show that in the troposphere nc and Kc usually decrease with the increase of either latitude or altitude. Synoptic and near-resonant Rossby waves could be trapped during their upward and meridional propagations. These characteristics possess prominent annual variations, especially in the Northern Hemisphere. It is found that the spatial and temperal variations of these kinematic characteristics are in good agreement with those of the atmospheric wave patterns. |
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