Further Development of a Non-Hydrostatic Semi-Implicit Semi-Lagrangian Global Atmospheric Model

[9525786] Semazzi和Scroggs在他们最后一次获奖期间，主要研究人员开发了一个非流体静力、半隐式、半拉格朗日全球大气模型。该奖项将追求的两个主要目标是：(1)将底部地形纳入其非流体静力模型，并在流体静力近似有效的分辨率下测试地形存在下的模型性能；(2)研究模型解决方案对分辨率的敏感性，并使用模型的高分辨率版本在区域和全球尺度上量化非流体静力效应。由于非流体静力环流的模拟只能在非常高的分辨率下实现，需要访问极其大量的计算机内存，因此执行后一项任务将需要开发基于并行处理的模型版本。由于全球大气模式的分辨率越来越高，以便有效地捕捉当地环流与天气和行星尺度流动的相互作用，因此必须能够充分反映非流体静力效应。这项研究项目将为实现这一目标作出重大贡献。

9525786 Semazzi and Scroggs Under their last award, the principal investigators developed a non-hydrostatic, semi-implicit, semi-Lagrangian global atmospheric model. The two main objectives that will be pursued under this award are: (1) to incorporate bottom topography in their non-hydrostatic model and test the model performance in the presence of topography at resolutions at which the hydrostatic approximation is valid and (2) to study the sensitivity of the model solutions to resolution and to quantify the non-hydrostatic effects at regional and global scales using a high resolution version of the model. Because simulation of non-hydrostatic circulations can be realized only at very high resolution requiring access to extremely large amounts of computer memory, carrying out the latter task will require the development of a version of the model based on parallel processing. As global atmospheric models move to ever higher resolutions in order to effectively capture the interactions of local circulations and the synoptic and planetary scale flows, it will be imperative to be able to adequately represent non-hydrostatic effects. This research project will contribute significantly towards that goal.