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

在研究单元“重力波的多尺度动力学（MS-GWaves）”的这个项目中，基于主要研究者的非线性WKB理论及其实际实现WKB方程的方法发展，解决了重力波（GW）传播的多尺度渐近动力学。理论和方法将通过分辨和非分辨全球Ws之间的相互作用，以及重新考虑全球Ws和地转模态之间的相互作用以及与天气尺度流之间的相互作用来扩展。这将通过对GW耗散的改进描述进行补充，并与FOR项目GW-ICE相互作用，通过重力波对流层顶相互作用的适当尺度相关模型进行补充。其结果将是一个通用的理论和数值方法的GW传播，波平均流相互作用和耗散的预测。将测试结果对理想化的大涡模拟。这将通过次电网规模GW预测模型（MS-GWaM）直接输入FOR项目GWING内开发的全球GW许可模型（UA-ICON）。这与研究单位项目SV和SI提供的源代码描述相结合。在UA-ICON/MS-GWaM中，波浪将影响大尺度流动。在诊断模式下使用它的选项，没有对解析流量的反馈，也是预期的。

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.