Results 231 to 240 of about 759 (266)

Cumulus dynamics: Local compensating subsidence and its implications for cumulus parameterization

pure and applied geophysics, 1975
Observations of air flow in and around convective clouds are summarized and discussed in light of the requirements for parameterization of midlatitude convection. Both theory and observation indicate that a substantial portion of the compensating subsidence occurs as dry downdrafts in the immediate vicinity of convective clouds, which suggests that an ...
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Parameterization of Horizontal Transport of Vorticity by Cumulus Convection

Journal of the Atmospheric Sciences, 1980
Abstract Dynamic processes of cumulus clouds which may produce significant horizontal eddy transport of vertical vorticity in the tropical atmosphere are discussed. It is shown in this paper that horizontal eddy transport of vorticity by cumulus convection, if it exists, must be due entirely to the irrotational component of the horizontal wind produced
Han-Ru Cho, Lawrence Cheng
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A Midlatitude Cumulus Parameterization that Incorporates Cloudtop Entrainment

Monthly Weather Review, 1987
Abstract In this paper we present a Kuo-type cumulus parameterization that includes a steady state one-dimensional cloudtop entraining cloud model and ice phase microphysics. Heating profiles computed with this parameterization are compared with those computed using the Kuo scheme and Anthes' scheme using data from SESAME-79.
Gregory R. Taylor, Marcia B. Baker
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An Overview of Cumulus Parameterization in Mesoscale Models

1993
The problem of cumulus parameterization is nowhere more difficult than in mesoscale numerical weather prediction models. Cotton and Anthes (1989) describe the very concept of cumulus parameterization as “muddy” and “not well posed” for models with grid spacing below 50 km.
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Prognostic Evaluation of Assumptions Used by Cumulus Parameterizations

Monthly Weather Review, 1993
Abstract Using a spectral-type cumulus parameterization that includes moist downdrafts within a three-dimensional mesoscale model, various disparate closure assumptions are systematically tested within the generalized framework of dynamic control, static control, and feedback.
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Parameterization of a momentum source in a tropical cumulus ensemble

Meteorology and Atmospheric Physics, 1993
An eddy effect of tropical deep convection on the large-scale momentum, resp vorticity budget is investigated. The process is specified by a simple parameterization approach which is based on a concept of rotating clouds exerting a momentum on the large-scale flow.
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Cumulus Parameterization in a Case Study of a Monsoon Depression

Monthly Weather Review, 1980
Abstract The Arakawa-Shubert cumulus parameterization scheme is applied in a semi-prognostic case study of a monsoon depression when it was forming over the Bay of Bengal. The cloud-work function quasi-equilibrium is found to hold even in this disturbed situation. Reasonable rates of precipitation and cumulus heating are obtained.
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A prognostic cumulus parameterization with cloud-updraft interaction

Convective parameterizations used in atmospheric models to represent the effects of unresolved shallow and deep convection on the large-scale flow are traditionally formulated in a diagnostic manner that assumes an instantaneous adjustment of convection to the resolved-scale environment.
Cristian Vraciu, Robert Plant
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Generalization of Albrecht's Cumulus Cloud Amount Parameterization

Journal of the Atmospheric Sciences, 1996
Abstract A diagnostic parameterization of cumulus cloud amount based on the decay of passive cloud material is reinvestigated. It is shown that assumptions previously made in the derivation may be relaxed by taking into account the heat budget of the decay process.
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The Cumulus Parameterization Problem: Past, Present, and Future

Journal of Climate, 2004
Abstract A review of the cumulus parameterization problem is presented with an emphasis on its conceptual aspects covering the history of the underlying ideas, major problems existing at present, and possible directions and approaches for future climate models.
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