3D Multi-Scale Dynamics of Gravity-Wave Propagation (3DMSD)

在“重力波的多尺度动力学（MS-GWaves）”研究单元的这个项目中，基于主要研究人员的非线性WKB理论和他们为实际实现WKB方程而开发的方法，研究了重力波（GW）传播的多尺度渐近动力学。理论和方法将通过解析和非解析gw之间的相互作用，以及重新考虑gw与地转模式之间的相互作用以及与天气尺度流的相互作用而得到扩展。这将通过改进对GW耗散的描述来补充，并且在与FOR项目GW- ice的相互作用中，通过合适的重力波对流层相互作用的尺度依赖模型来补充。结果将是预测GW传播，波-平均流相互作用和耗散的一般理论和数值方法。结果将在理想的大涡模拟中进行测试。这将通过亚电网规模GW的预测模型（MS-GWaM）直接输入到for项目GWING中开发的全球GW许可模型（UA-ICON）。这与研究单元项目SV和SI提供的源描述相关联。在UA-ICON/MS-GWaM中，波浪会影响大尺度的流动。还打算在诊断模式中使用它，而不对已解析的流进行反馈。

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.