Modelling horizontal propagation of orographic Gravity Waves in climate models
- 1IEK-7, Forschungszentrum Juelich, Juelich, Germany
- 2Institut für Physik der Atmosphäre, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Munich, Germany
- 3Department of Atmospheric Physics, Charles University, Prague, Czech Republik
Gravity waves (GWs) transport energy within the atmosphere both in vertical and horizontal direction. While the former is considered in climate models via parameterizations, the latter is often not modeled in most long time simulations. Especially orographic GWs can propagate horizontally more than 1000 km from their sources, however, and thereby de- or accelerate winds in completely different regions. To remedy this, we present a model that is capable of describing orographic GW sources and the associated GWs and their propagation in the atmosphere. From this, we can approximate general propagation pattern, which in the following can be used in climate models (here EMAC) to improve the orographic GW parameterization. The first simulations show strong redistribution of wave drag from land masses and thereby a closing of the gap of missing wave drag at 60°S.
How to cite: Rhode, S., Eichinger, R., Preusse, P., Garny, H., and Krasauskas, L.: Modelling horizontal propagation of orographic Gravity Waves in climate models, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-11529, https://doi.org/10.5194/egusphere-egu23-11529, 2023.
