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Poleward propagations of the ITCZ: observations and theory

Gadgil, S (1990) Poleward propagations of the ITCZ: observations and theory. In: International Symposium on `Monsoon: Understanding and Prediction', 23-28 Nov. 1988, Pune, India, pp. 285-290.

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Abstract

Many features of the intraseasonal variation of the ITCZ over the Indian longitudes in the summer monsoon including poleward propagations emanating from oceanic regions and traversing both ocean and land to culminate in the seasonal trough have been simulated by a modified version of the Webster model. The mechanism underlying the propagations in the model involves excess convective heating to the poleward side of the convergence zone relative to the equatorward zone and can operate on land or sea. This differential arises in the model from the seasonal gradient of the convective instability and moisture availability and hence the intensity factor of convective heating which is the product of the two factors.

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to India Meterological Department (IMD).
Keywords: Atmospheric humidity;Convective instability;Theoretical study;Satellite observation;Cloudiness;Atmospheric circulation;Summer monsoon;Intertropical convergence zone; Atmospheric humidity;Convective instability;Theoretical study;Satellite observation;Cloudiness;Atmospheric circulation;Summer monsoon;Intertropical convergence zone; Atmospheric humidity;Convective instability; Theoreticalstudy;Satellite observation;Cloudiness; Atmospheric circulation;Summer monsoon;Intertropical convergence zone;
Department/Centre: Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences
Date Deposited: 24 Oct 2007
Last Modified: 24 Jan 2012 06:49
URI: http://eprints.iisc.ernet.in/id/eprint/11425

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