The dynamic effect of the Tibetan Plateau on the formation of zonal type circulation over East Asia
Autor: | Xuehong Zhang, Meixia Luo, Baozhen Zhu |
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Rok vydání: | 1985 |
Předmět: | |
Zdroj: | Advances in Atmospheric Sciences. 2:158-166 |
ISSN: | 1861-9533 0256-1530 |
Popis: | 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 consistent 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. |
Databáze: | OpenAIRE |
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