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DOI | 10.1175/JAS-D-17-0162.1 |
Large-Eddy Simulation of the Stratocumulus-Capped Boundary Layer with Explicit Filtering and Reconstruction Turbulence Modeling | |
Shi, Xiaoming1; Hagen, Hannah L.1; Chow, Fotini Katopodes1; Bryan, George H.2; Street, Robert L.3 | |
2018-02-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2018 |
卷号 | 75期号:2页码:611-637 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Large-eddy simulation (LES) has been an essential tool in the development of theory and parameterizations for clouds, but when applied to stratocumulus clouds under sharp temperature inversions, many LES models produce an unrealistically thin cloud layer and a decoupled boundary layer structure. Here, explicit filtering and reconstruction are used for simulation of stratocumulus clouds observed during the first research flight (RF01) of the Second Dynamics and Chemistry of the Marine Stratocumulus field study (DYCOMS II). The dynamic reconstruction model (DRM) is used within an explicit filtering and reconstruction framework, partitioning subfilter-scale motions into resolvable subfilter scales (RSFSs) and unresolvable subgrid scales (SGSs). The former are reconstructed, and the latter are modeled. Differing from traditional turbulence models, the reconstructed RSFS stress/fluxes can produce backscatter of turbulence kinetic energy (TKE) and, importantly, turbulence potential energy (TPE). The modeled backscatter reduces entrainment at the cloud top and, meanwhile, strengthens resolved turbulence through preserving TKE and TPE, resulting in a realistic boundary layer with an adequate amount of cloud water and vertically coupled turbulent eddies. Additional simulations are performed in the terra incognita, when the grid spacing of a simulation becomes comparable to the size of the most energetic eddies. With 20-m vertical and 1-km horizontal grid spacings, simulations using DRM provide a reasonable representation of bulk properties of the stratocumulus-capped boundary layer. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000425753300013 |
WOS关键词 | SUBGRID-SCALE ; NUMERICAL ERRORS ; CLOUD ; ENTRAINMENT ; CUMULUS ; SCHEME ; FLOW |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/29731 |
专题 | 地球科学 |
作者单位 | 1.Univ Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA 94720 USA; 2.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA; 3.Stanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305 USA |
推荐引用方式 GB/T 7714 | Shi, Xiaoming,Hagen, Hannah L.,Chow, Fotini Katopodes,et al. Large-Eddy Simulation of the Stratocumulus-Capped Boundary Layer with Explicit Filtering and Reconstruction Turbulence Modeling[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(2):611-637. |
APA | Shi, Xiaoming,Hagen, Hannah L.,Chow, Fotini Katopodes,Bryan, George H.,&Street, Robert L..(2018).Large-Eddy Simulation of the Stratocumulus-Capped Boundary Layer with Explicit Filtering and Reconstruction Turbulence Modeling.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(2),611-637. |
MLA | Shi, Xiaoming,et al."Large-Eddy Simulation of the Stratocumulus-Capped Boundary Layer with Explicit Filtering and Reconstruction Turbulence Modeling".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.2(2018):611-637. |
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