Held‐Suarez simulations with the Community Atmosphere Model Spectral Element (CAM‐SE) dynamical core: A global axial angular momentum analysis using Eulerian and floating Lagrangian vertical coordinates
Held‐Suarez simulations with the Community Atmosphere Model Spectral Element (CAM‐SE) dynamical core: A global axial angular momentum analysis using Eulerian and floating Lagrangian vertical coordinates
复制标题
使用社区大气模型谱元 (CAM-SE) 动力核心进行 Held-Suarez 模拟：使用欧拉和浮动拉格朗日垂直坐标进行全局轴向角动量分析
DOI：
10.1002/2013ms000268
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发表时间：
2014
影响因子：
6.8
通讯作者：
M. Taylor
中科院分区：
文献类型：
--
作者：
P. Lauritzen;J. Bacmeister;T. Dubos;S. Lebonnois;M. Taylor
本文分析了hold - Suarez强迫作用下NCAR群落大气模式谱元（CAM - SE）动力核心的全局AAM守恒特性。结果表明，在CAM‐SE中，AAM的伪源/汇比参数化（物理）源/汇小3个数量级。通过改变动力核的各种数值方面（例如，不同的垂直坐标，降低的精度形式顺序，增加的耗散和降低的散度阻尼），研究了对AAM守恒的影响。特别值得注意的是，从欧拉（杂化-西格玛）到浮动拉格朗日垂直坐标的变化不会改变CAM - SE的全局AAM守恒性质。
In this paper, an analysis of the global AAM conservation properties of NCAR's Community Atmosphere Model Spectral Element (CAM‐SE) dynamical core under Held‐Suarez forcing is presented. It is shown that the spurious sources/sinks of AAM in CAM‐SE are 3 orders of magnitude smaller than the parameterized (physical) sources/sinks. The effect on AAM conservation by changing various numerical aspects of the dynamical core (e.g., different vertical coordinates, reduced formal order of accuracy, increased dissipation, and decreased divergence damping) is investigated. In particular, it is noted that changing from Eulerian (hybrid‐sigma) to floating Lagrangian vertical coordinates does not alter the global AAM conservation properties of CAM‐SE.