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Vertical coupling in the Indian summer monsoon

Keshavamurty, RN (1971) Vertical coupling in the Indian summer monsoon. Nature, 232. pp. 169-170.

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CHARNEY1,2 has shown from considerations of scale analysis that synoptic scale motions in the tropics have little coupling between the upper and lower tropospheres, except in regions of deep cumulus convection. The fact that theories of baroclinic instability do not explain the growth of tropical disturbances and the observational studies of Yanai et al. 3 lend support to this. Yanai et al. 3 found two types of disturbances, one corresponding to easterly waves in the lower troposphere which have large coherence in the vertical from 1,000 to 500 mbar, and the other corresponding to waves with a horizontal extent of 10,000 km and maximum intensity around 17 km which have large coherence between 200 and 50 mbar. In this article I summarize my findings on coherence of monsoon disturbances in the vertical.

Item Type: Article
Additional Information: Copyright of this article belongs to Nature Publishing Group
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 14 May 2016 09:28
Last Modified: 14 May 2016 09:28

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