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

9525786塞马齐和斯克罗格在他们最后一次获奖时，主要研究人员开发了一个非静力、半隐式、半拉格朗日全球大气模式。该奖项将追求的两个主要目标是：(1)将海底地形纳入他们的非静力模式，并在存在地形的情况下测试模式的性能，在地形的分辨率下，流体静力近似是有效的；(2)研究模式解对分辨率的敏感性，并使用模式的高分辨率版本来量化区域和全球尺度上的非静力效应。由于非静力环流的模拟只有在非常高的分辨率下才能实现，需要访问极大量的计算机内存，执行后一项任务将需要开发基于并行处理的模型版本。随着全球大气模式向更高的分辨率发展，以便有效地捕捉当地环流与天气和行星尺度气流的相互作用，必须能够充分反映非静力效应。这一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.