Medium-term Dynamics

The dynamics of wave-mean flow interaction is of basic importance for the patterns of atmospheric circulation. Planetary Rossby waves govern sudden stratospheric warmings, the Brewer-Dobson circulation and other phenomena in the stratosphere, while gravity waves are important in the mesosphere. Subject of this research theme are their medium-term effects in the middle atmosphere and the associated spatio-temporal variability of the circulation in the mesosphere / lower thermosphere.

Methods

The diagnosis of the impact of Rossby and gravity waves in simulations (for example from KMCM or UA-ICON) is important, which implies the application and further development of tools like the Eliassen-Palm flux or simplified transport models. The joint evaluation of models with observations and analyses is undertaken to identify the relevant processes.

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