NCAR Release of CAM-SE in CESM2.0: A Reformulation of the Spectral Element Dynamical Core in Dry-Mass Vertical Coordinates With Comprehensive Treatment of Condensates and Energy
NCAR Release of CAM-SE in CESM2.0: A Reformulation of the Spectral Element Dynamical Core in Dry-Mass Vertical Coordinates With Comprehensive Treatment of Condensates and Energy
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DOI：
10.1029/2017ms001257
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发表时间：
2018-07-01
影响因子：
6.8
通讯作者：
Tribbia, J. J.
中科院分区：
文献类型：
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作者：
Lauritzen, P. H.;Nair, R. D.;Tribbia, J. J.
本文的目的是提供一个全面的文件的新的NCAR（国家大气研究中心）版本的光谱元素（SE）动力核心的一部分，社区地球系统模型（CESM2.0）发布。此版本在几个方面与SE动态核心的以前版本不同。最值得注意的是，混合西格玛垂直坐标是基于干燥的空气质量，冷凝物在热力学和动量方程（也称为冷凝物加载）中是动态活跃的，并且连续的运动方程保存了包括冷凝物的更全面的总能量。在不考虑垂直坐标变化的情况下，对高粘流算子和垂直重映射算法进行了改进。代码库已被显着减少，加速，并作为集成SE作为CAM（社区大气模型）存储库中的动态核心的一部分，而不是从高阶方法建模环境中导入SE动态核心作为外部代码。
It is the purpose of this paper to provide a comprehensive documentation of the new NCAR (National Center for Atmospheric Research) version of the spectral element (SE) dynamical core as part of the Community Earth System Model (CESM2.0) release. This version differs from previous releases of the SE dynamical core in several ways. Most notably the hybrid sigma vertical coordinate is based on dry air mass, the condensates are dynamically active in the thermodynamic and momentum equations (also referred to as condensate loading), and the continuous equations of motion conserve a more comprehensive total energy that includes condensates. Not related to the vertical coordinate change, the hyperviscosity operators and the vertical remapping algorithms have been modified. The code base has been significantly reduced, sped up, and cleaned up as part of integrating SE as a dynamical core in the CAM (Community Atmosphere Model) repository rather than importing the SE dynamical core from High-Order Methods Modeling environment as an external code.