Project Details
Projekt
3D Multi-Scale Dynamics of Gravity-Wave Propagation (3DMSD)
Subject Area
Atmospheric Science
Term
from 2014 to 2020
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 218499286
In this project in the research unit "Multi-Scale Dynamics of Gravity Waves (MS-GWaves)" the multi-scale asymptotic dynamics of gravity-wave (GW) propagation is addressed, based on a nonlinear WKB theory of the principal investigators and their methodological developments for the practical implementation of WKB equations. Theory and method will be extended by the interaction between resolved and non-resolved GWs, and a reconsideration of the mutual interaction between GWs and geostrophic modes, and with the synoptic-scale flow. This will be supplemented by an improved description of GW dissipation, and, in interaction with the FOR project GW-ICE, by suitable scale-dependent models for gravity wave tropopause-interactions. The outcome will be a general theory and numerical method for the prediction of GW propagation, wave-mean-flow interaction, and dissipation. The results will be tested against idealized large-eddy simulations. This will feed directly, via a prognostic model for subgrid-scale GWs (MS-GWaM), into the global GW permitting model (UA-ICON) developed within the FOR project GWING. This is coupled to the source descriptions delivered by the Research unit projects SV and SI. In UA-ICON/MS-GWaM the waves will affect the large-scale flow. The option to use it in diagnostic mode, without feedback on the resolved flow, is intended as well.
DFG Programme
Research Units
