Application of a new nonorographic gravity wave parameterization to model simulations

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Monday, 5 January 2015
Christoph Zülicke, Leibniz Institute of Atmospheric Physics, Kühlungsborn, Germany; and M. Mirzaei, A. R. Mohebalhojeh, and R. Plougonven

The life cycle of a moist baroclinic wave is often associated with the generation of upward-propagating gravity waves. The interactions of these wave types are studied with the mesoscale Weather Research and Forecasting model at different resolution and moisture. Several gravity wave packets are identified in the lower stratosphere with a characteristic structure and location above jets, fronts and convective regions. Relevant large-scale generation processes such as the flow deceleration, frontogenesis and condensational heating are included in a new state-dependent parameterization formula. It performed very well with the six different simulations – its use in global circulation models is discussed.