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Interaction of the convective energy cycle and large-scale dynamics

Yano, J.-I. and Plant, R. S. ORCID: (2023) Interaction of the convective energy cycle and large-scale dynamics. Journal of the Atmospheric Sciences, 80 (11). pp. 2685-2699. ISSN 1520-0469

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To link to this item DOI: 10.1175/JAS-D-23-0066.1


The importance of the convective life cycle in tropical large-scale dynamics has long been emphasized, but without explicit analysis. The present work provides it by coupling the convective energy cycle under the framework of Arakawa and Schubert's (1974) convection parameterization with a shallow-water analogue atmosphere. The square frequency of linear convectively-coupled waves is given by a squared sum of the dry gravity-wave and the convective energy-cycle frequencies, shortening the period of the convective cycle through the large-scale coupling. In a weakly nonlinear regime, the system follows an equation analogous to the Kortweg-de Vries equation, which exhibits a solitary-wave solution, with behavior reminiscent of observed tropical westerly-wind bursts.

Item Type:Article
Divisions:Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:113199
Publisher:American Meteorological Society


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