CAM-SE: A scalable spectral element dynamical core for the Community Atmosphere Model
CAM-SE: A scalable spectral element dynamical core for the Community Atmosphere Model
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DOI：
10.1177/1094342011428142
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发表时间：
2012-02-01
影响因子：
3.1
通讯作者：
Worley, Patrick H.
中科院分区：
文献类型：
--
作者：
Dennis, John M.;Edwards, Jim;Worley, Patrick H.
社区大气模式(CAM)版本5包括来自NCAR的高阶方法建模环境的光谱元素动力核心选项。它是一种适用于全非结构四边形网格的连续Galerkin谱有限元方法。CAM中的当前配置基于立方体球体网格。包含谱元素动态核心的主要动机是通过允许对不需要极化滤器的球体进行准均匀网格来提高CAM的可伸缩性。此外，该方法还提供了其他最先进的功能，如改进的保护属性。谱单元用于水平离散化，而动力核的大多数其他方面是来自CAM的有限体积和全局谱动力核选项的经过良好测试的技术的混合。在这里，我们首先对CAM中使用的谱元素动力学核进行了概述。然后，我们给出了在社区地球系统模型中使用前工业时间片配置的三种不同动态核心选项运行的CAM的可扩展性和性能结果。我们专注于高分辨率的模拟，使用1/4度、1/8度和T341谱截断水平网格。
The Community Atmosphere Model (CAM) version 5 includes a spectral element dynamical core option from NCAR's High-Order Method Modeling Environment. It is a continuous Galerkin spectral finite-element method designed for fully unstructured quadrilateral meshes. The current configurations in CAM are based on the cubed-sphere grid. The main motivation for including a spectral element dynamical core is to improve the scalability of CAM by allowing quasi-uniform grids for the sphere that do not require polar filters. In addition, the approach provides other state-of-the-art capabilities such as improved conservation properties. Spectral elements are used for the horizontal discretization, while most other aspects of the dynamical core are a hybrid of well-tested techniques from CAM's finite volume and global spectral dynamical core options. Here we first give an overview of the spectral element dynamical core as used in CAM. We then give scalability and performance results from CAM running with three different dynamical core options within the Community Earth System Model, using a pre-industrial time-slice configuration. We focus on high-resolution simulations, using 1/4 degree, 1/8 degree, and T341 spectral truncation horizontal grids.