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方程而发展的方法，讨论了重力波(GW)传播的多尺度渐近动力学。通过可分辨和非可分辨GWS之间的相互作用，以及GWS与地转模和天气尺度流之间相互作用的重新考虑，将扩展理论和方法。此外，还将改进对GW耗散的描述，并在与GW-ICE项目的相互作用中，为重力波对流层顶相互作用建立适当的尺度相关模式。其结果将成为预报GW传播、波-均流相互作用和消散的一般理论和数值方法。结果将与理想化的大涡模拟进行对比测试。这将通过次网格规模全球水资源的预测模型(MS-GWaM)直接输入在FOR项目GWING内开发的全球水资源许可模型(UA-ICON)。这与研究单位项目SV和SI提供的来源描述相结合。在UA-ICON/MS-GWaM中，波浪会对大尺度流动产生影响。还可以选择在诊断模式下使用它，而不对已解决的流进行反馈。

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.