87th AMS Annual Meeting

Tuesday, 16 January 2007
A Non-hydrostatic Hybrid Vertical Coordinate Dynamical Core
Exhibit Hall C (Henry B. Gonzalez Convention Center)
Mike Toy, Colorado State Univ., Fort Collins, CO
A new dynamical core is developed based on the elastic, non-hydrostatic equations of motion using a hybrid vertical coordinate. A height-based, terrain-following coordinate is used near the surface which smoothly transitions to a quasi-Lagrangian (isentropic) coordinate in the free atmosphere. Integral constraints such as total energy and angular momentum conservation are preserved by the vertical differencing scheme. The dynamics are tested in a model which is a prototype for a future global cloud resolving model. Test results on various spatial scales are presented.

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