Results 211 to 220 of about 759 (266)
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Cumulus Parameterization and CISK
Journal of the Atmospheric Sciences, 1973Abstract Arakawa's recent parameterization of the effects of a cumulus ensemble on the large-scale environment is applied to the problem of conditional instability of the second kind (CISK). In particular, Charney's linear, two-level, line-symmetry CISK model of the ITCZ is re-examined using a simplified non-entraining cloud version of the Arakawa ...
M. Israeli, E. S. Sarachik
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A Climatological Parameterization for Cumulus Clouds
Journal of the Atmospheric Sciences, 1991Abstract A research airplane was used to study the microphysical characteristics of ice-free, nonprecipitating summertime cumulus clouds in Montana. Each cloud was penetrated at a multiplicity of levels encompassing, in general, a large fraction of the cloud depth. Similar studies covering a more limited altitude range were made in New Mexico.
A. M. Blyth, J. Latham
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A cumulus parametrization with a prognostic closure
Quarterly Journal of the Royal Meteorological Society, 1998AbstractThe paper describes the introduction of a prognostic cumulus kinetic energy (CKE) as a replacement for the quasi‐equilibrium closure hypothesis of Arakawa and Schubert (AS).In the original version of the AS parameterization, the cloud work function, a measure of the convective available potential energy, is assumed to be maintained at ‘small ...
Dzong‐Ming Pan, Davi D. A. Randall
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Cumulus parameterizations in chemical transport models
Journal of Geophysical Research: Atmospheres, 1995Global three‐dimensional chemical transport models (CTMs) are valuable tools for studying processes controlling the distribution of trace constituents in the atmosphere. A major uncertainty in these models is the subgrid‐scale parametrization of transport by cumulus convection.
Natalie M. Mahowald +2 more
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The Kuo Cumulus Parameterization
1993The Kuo cumulus parameterization (Kuo 1965, 1974) is one of the earliest and most enduringly popular schemes for parameterizing cumulus convection. The purposes of this paper are to describe the scheme and some of the more notable variations on it and to make a critical evaluation of its suitability for use under various circumstances.
David J. Raymond, Kerry A. Emanuel
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Wave-CISK and Cumulus Parameterization
Journal of the Atmospheric Sciences, 1976Abstract A linearized version of the cumulus parameterization theory of Arakawa and Schubert (1974) is used in an equatorial wave model to test the wave-CISK hypothesis under the quasi-equilibrium assumption. A unique relationship between cumulus heating and large-scale vertical motion at all levels is derived.
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Cumulus Parameterization and Rainfall Rates I
Monthly Weather Review, 1980Abstract Modeling of convective rainfall rates is a central problem in tropical meteorology. Toward numerical weather prediction efforts the semi-prognostic approach (i.e., a one time-step prediction of rainfall rates) provides a relevant test of cumulus parameterization methods.
T. N. Krishnamurti +4 more
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The Cumulus Parameterization Problem
Monthly Weather Review, 1983Abstract In the past two decades there has been extensive research into the nature of atmospheric convection and scale interactions in cumulus regimes. A major goal of these efforts has been to advance the state of the art in cumulus parameterization. This paper reviews the cumulus parameterization problem in terms of fundamental principles, goals and ...
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The Arakawa-Schubert Cumulus Parameterization
1993The motivation of the paper by Arakawa and Schubert (1974) (hereafter referred to as A-S) was to present a theoretical framework that can be used for understanding the physical and logical basis for cumulus parameterization. More specifically, the paper attempted to answer the following questions: 1) How can cumulus clouds modify their ...
Akio Arakawa, Ming-Dean Cheng
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Some remarks on cumulus parameterization
pure and applied geophysics, 1988A simple parameterization of cumulonimbus convective heating is presented. The model is primarily based on preserving a moisture budget and on detraining cloud air at levels corresponding to the neutral buoyancy of the air converged at low levels. Results are compared with data from the western Pacific and GATE. Agreement is good.
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