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Small scale characteristics during the Indian summer monsoon

Sinha, S and Sinha, SK (1983) Small scale characteristics during the Indian summer monsoon. Archives for Meteorology, Geophysics, and Bioclimatology Series A, 32 (3). pp. 281-288.

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The daily upper-air wind data, obtained from the MONEX-79 ship observing platforms, are subjected to a 2-D filter, whose wavenumber response is such as to filter out waves having wavelengths less than 760 km. The filtered wind components are referred to as "eddies". The kinetic energies of these eddies during the three phases of the monsoon, viz. (a) pre-onset (May), (b) onset (June), (c) established (July) are studied. It is found that the contribution to the kinetic energies of the total wind, by the eddies, vary from a minimum of about 15.5 during the pre-onset phase to a maximum of 40 during the established phase. The energy exchanges between the eddy and large-scale wind components, indicate that during the established phase the lower troposphere, upto 700 mb, appears to have a baroclinically unstable basic flow, while during the other phases, the basic flow is, in general, barotropically unstable.

Item Type: Article
Additional Information: Copyright of this article belongs to Springer-Verlag
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 20 Apr 2015 18:03
Last Modified: 20 Apr 2015 18:03

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