Phenomenology of convection-parameterization closure

by J. I. Yano, M. Bister, Z. Fuchs, L. Gerard, V. T J Phillips, S. Barkidija, J. M. Piriou
Atmospheric Chemistry and Physics ()
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Abstract

Closure is a problem of defining the convective intensity in a given\nparameterization. In spite of many years of efforts and progress, it is\nstill considered an overall unresolved problem. The present article\nreviews this problem from phenomenological perspectives.\nThe physical variables that may contribute in defining the convective\nintensity are listed, and their statistical significances identified by\nobservational data analyses are reviewed. A possibility is discussed for\nidentifying a correct closure hypothesis by performing a linear\nstability analysis of tropical convectively coupled waves with various\ndifferent closure hypotheses. Various individual theoretical issues are\nconsidered from various different perspectives. The review also\nemphasizes that the dominant physical factors controlling convection\ndiffer between the tropics and extra-tropics, as well as between oceanic\nand land areas.\nBoth observational as well as theoretical analyses, often focused on the\ntropics, do not necessarily lead to conclusions consistent with our\noperational experiences focused on mid-latitudes. Though we emphasize\nthe importance of the interplays between these observational,\ntheoretical and operational perspectives, we also face challenges for\nestablishing a solid research framework that is universally applicable.\nAn energy cycle framework is suggested as such a candidate.

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