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Radiative Impacts on the Growth of Drops within Simulated Marine Stratocumulus. Part II: Solar Zenith Angle Variations

ABSTRACT

The effects of solar heating at a variety of solar zenith angles (Θ^sub o^) on the vapor depositional growth of cloud drops, and hence the potential for collection enhancement, is investigated. A large eddy simulation (LES) model is used to predict the evolution of marine stratocumulus clouds subject to changes in Θ^sub o^. During the course of each simulation, LES output is stored for 600 parcel trajectories and is used to drive an offline microphysical model that includes the influence of radiation on drop growth.

Smaller Θ^sub o^, such as when the sun is overhead, provide strong solar heating, which tends to confine circulations to the cloud layer and leads to ...

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