An intercomparison of large-eddy simulations of the stable boundary layer
An intercomparison of large-eddy simulations of the stable boundary layer
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DOI：
10.1007/s10546-004-2820-6
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发表时间：
2006-02-01
影响因子：
4.3
通讯作者：
Sullivan, P
中科院分区：
文献类型：
--
作者：
Beare, RJ;MacVean, MK;Sullivan, P
作为全球能量和水循环实验大气边界层研究倡议的一部分，从稳定边界层（SBL）的大涡模拟（LES）模型的第一次相互比较的结果。根据北极观测，使用了一个中等稳定的情况。所有的模型都能成功地模拟，因为它们能产生分辨的湍流，并反映了局部尺度理论和观测的许多结果。在1米和2米的分辨率进行的模拟显示，只有很小的变化，平均配置文件相比，粗糙的分辨率。此外，个别模型的次网格模型的敏感性突出了它们在SBL模拟中的重要性，在中等分辨率（6.25米）。稳定性函数来自LES，使用数值天气预报（NWP）和气候模式中使用的典型混合长度。这些函数的值小于NWP中使用的值。在参数化中也支持使用K剖面相似性。因此，结果提供了更好的理解和激励未来的发展的参数化的SBL。
Results are presented from the first intercomparison of large-eddy simulation (LES) models for the stable boundary layer (SBL), as part of the Global Energy and Water Cycle Experiment Atmospheric Boundary Layer Study initiative. A moderately stable case is used, based on Arctic observations. All models produce successful simulations, in as much as they generate resolved turbulence and reflect many of the results from local scaling theory and observations. Simulations performed at 1-m and 2-m resolution show only small changes in the mean profiles compared to coarser resolutions. Also, sensitivity to subgrid models for individual models highlights their importance in SBL simulation at moderate resolution (6.25 m). Stability functions are derived from the LES using typical mixing lengths used in numerical weather prediction (NWP) and climate models. The functions have smaller values than those used in NWP. There is also support for the use of K-profile similarity in parametrizations. Thus, the results provide improved understanding and motivate future developments of the parametrization of the SBL.