The Dependence of CAM Cloud and Precipitation Simulations on Horizontal and Vertical Resolution

Stephen Klein Lawrence Livermore National Laboratory
Jim Boyle Lawrence Livermore National Laboratory
Sungsu Park University of Washington

Category: Modeling

Working Group: Cloud Life Cycle

We examine how Community Atmosphere Model (CAM) simulations of clouds and precipitation vary with changes in the model’s horizontal and vertical resolution. For horizontal resolution, we examine simulations of tropical precipitation in models with resolution as fine as 0.25 degrees latitude-longitude. We utilize the CAPT weather forecasting approach and analyze simulations for the period of the ARM TWP-ICE campaign utilizing both ARM and satellite data. For vertical resolution, we contrast climate simulations of cloud and boundary-layer properties in climate simulations with 80 instead of the default 30 vertical levels. Particular quantities sensitive to vertical resolution include the simulation of marine stratocumulus clouds, tropical water vapor, and the stable boundary layer over ice sheets.

This poster will be displayed at ASR Science Team Meeting.

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