Initiation Mechanisms and Development of Cumulus Convection

Geoffrey E. Hill Utah Water Research Laboratory, Utah State University, Logan 84322

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Abstract

Two cases of deep convection are numerically simulated in a two-dimensional time-dependent model and compared with observations. Various aspects of the simulated convection include the cloud size, height, spacing, lifetime, vertical motion, time of occurrence and precipitation. Maximum cloud-top heights based upon quasi-uniform surface temperature changes, in accordance with the observed, are compared with numerical model results obtained by using various type and size perturbations.

Abstract

Two cases of deep convection are numerically simulated in a two-dimensional time-dependent model and compared with observations. Various aspects of the simulated convection include the cloud size, height, spacing, lifetime, vertical motion, time of occurrence and precipitation. Maximum cloud-top heights based upon quasi-uniform surface temperature changes, in accordance with the observed, are compared with numerical model results obtained by using various type and size perturbations.

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