GSTDTAP  > 地球科学
DOI10.1175/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
ISSN0022-4928
EISSN1520-0469
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
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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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