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An observational study on the energetics of the onset monsoon vortex, 1979

George, L and Mishra, SK (1993) An observational study on the energetics of the onset monsoon vortex, 1979. Quarterly Journal - Royal Meteorological Society, 119 (512). pp. 755-778.

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Abstract

Strengthening of the meridional and vertical shear of the mean zonal wind is noticed during the period. The vortex is formed to the north of the westerly jet, in the zone of maximum cyclonic shear. The northward shift of the large-scale monsoon current is noticed in association with northward movement of the onset vortex. It is identified from the mean energetics that both barotropic and baroclinic energy conversions, and also the boundary terms, maintain the vortex. Baroclinic energy transfer to eddy kinetic energy (KE) takes place not only in the upper levels but also in the lower levels. Further, the energy conversion from zonal kinetic energy (KZ) to KE dominates over the energy conversion from eddy available potential energy (AE) to KE. The generation rate of the zonal and eddy available potential energy and the frictional dissipation of KE are computed by the residue method; the values are 0.54 W m-2, 0.25 W m-2 and 0.65 W m-2, respectively.

Item Type: Article
Additional Information: Copyright of this article belongs to Royal Meteorological Society
Uncontrolled Keywords: energetics; monsoon vortex; vortex dynamics
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 05 Jun 2015 06:59
Last Modified: 05 Jun 2015 06:59
URI: http://moeseprints.incois.gov.in/id/eprint/1060

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