| THE DYNAMIC EFFECT OF THE TIBETAN PLATEAU ON THE FORMATION OF ZONAL TYPE CIRCULATION OVER EAST ASIA |
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| 作者姓名： | Luo Meixi Zhu Baozhen Zhang Xuehong |
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| 作者单位： | Institute of Atmospheric Physics，Academia Sinica，Beijing，Institute of Atmospheric Physics，Academia Sinica，Beijing，Institute of Atmospheric Physics，Academia Sinica，Beijing |
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| 摘 要： | From a statistical study of the atmospheric circulation types over the Northern Hemisphere it is found that the zonal type circulation predominates in East Asia. From a three-layer primitive equation model in σ-coordinate, the orographic effect on a westerly current over the Northern Hemisphere is studied. A distinguished deepening trough is observed in the lee-side slope of the Rocky Mountains. But a pronounced trough is over the East Asia coast far from the Tibetan Plateau. In a case of 48 h numerical forecast, it is found that the effect of the Tibetan Plateau tends to build up a rather zonal type circulation, which is con-sistent with the observations. These may be partly explained by the topographic effect of the north slope of the Tibetan Plateau in a simple geostrophic theory.
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The dynamic effect of the Tibetan Plateau on the formation of zonal type circulation over East Asia |
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| Luo Meixi,Zhu Baozhen,Zhang Xuehong.THE DYNAMIC EFFECT OF THE TIBETAN PLATEAU ON THE FORMATION OF ZONAL TYPE CIRCULATION OVER EAST ASIA[J].Advances in Atmospheric Sciences,1985,2(2):158-166. |
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| Authors: | Meixia Luo Baozhen Zhu Xuehong Zhang |
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| Institution: | Institute of Atmospheric Physics, Academia Sinica, Beijing,Institute of Atmospheric Physics, Academia Sinica, Beijing,Institute of Atmospheric Physics, Academia Sinica, Beijing |
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| Abstract: | From a statistical study of the atmospheric circulation types over the Northern Hemisphere it is found that the zonal type circulation predominates in East Asia. From a three-layer primitive equation model in σ-coordinate, the orographic effect on a westerly current over the Northern Hemisphere is studied. A distinguished deepening trough is observed in the lee-side slope of the Rocky Mountains. But a pronounced trough is over the East Asia coast far from the Tibetan Plateau. In a case of 48 h numerical forecast, it is found that the effect of the Tibetan Plateau tends to build up a rather zonal type circulation, which is con-sistent with the observations. These may be partly explained by the topographic effect of the north slope of the Tibetan Plateau in a simple geostrophic theory. |
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