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Abstract The problem of the representation of the orientation of mountain forces in a GCM is examined. First a series of winter simulations is presented with the Laboratoire de Météorologie Dynamique GCM where the model ground is flat and where the mountains are represented by applying forces to the flow that are either strictly opposite to the local wind (i.e., a drag) or strictly perpendicular to it (i.e., a lift). These experiments show that the drag forces improve the zonal wind but do not improve the steady planetary wave everywhere, while the lift forces scarcely affect the zonal wind but force a steady planetary wave that is everywhere realistic. The drag force is formulated following the realistic subgrid-scale orographic (SSO) scheme, developed recently at ECMWF. The lift force essentially enhances vortex stretching over large-scale mountains. To address issues concerning the representation of SSO in GCMs, experiments with mean orography, the ECMWF SSO scheme, and enhanced lift forces over mountain🗓️ Mark your calendar at Blind Pig. Mountains In Drag is a celebration of passion, innovation, and community. Embrace the opportunity to explore the world of various interests in a dynamic setting in Michigan, United States. Don't miss out on this remarkable event 🌈. http://maps.seatics.com/GeneralAdmissionEvent_2018-08-31_1222_SVGC_tn.gif
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Event Venue & Nearby Stays
Blind Pig, 208 S First St, Blind Pig, Ann Arbor, Michigan, United States
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