globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2014MS000370
Scopus记录号: 2-s2.0-85027954827
论文题名:
The influence of misrepresenting the nocturnal boundary layer on idealized daytime convection in large-eddy simulation
作者: Van Stratum B; J; H; , Stevens B
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2015
卷: 7, 期:2
起始页码: 423
结束页码: 436
语种: 英语
英文关键词: Balloons ; Boundary layer flow ; Boundary layers ; Boundary layer depth ; Convective boundary layers ; Diel cycles ; Horizontal grid spacing ; Meteorological sites ; Nocturnal boundary layers ; Numerical experiments ; Sensitivity studies ; Large eddy simulation ; atmospheric convection ; atmospheric modeling ; convective boundary layer ; diel variation ; land surface ; large eddy simulation ; mixing ratio ; nocturnal boundary layer ; relative humidity ; spacing ; temperature ; turbulence ; Cabauw ; Germany ; Hamburg [Germany] ; Netherlands ; Utrecht [Netherlands]
英文摘要: The influence of poorly resolving mixing processes in the nocturnal boundary layer (NBL) on the development of the convective boundary layer the following day is studied using large-eddy simulation (LES). Guided by measurement data from meteorological sites in Cabauw (Netherlands) and Hamburg (Germany), the typical summertime NBL conditions for Western Europe are characterized, and used to design idealized (absence of moisture and large-scale forcings) numerical experiments of the diel cycle. Using the UCLA-LES code with a traditional Smagorinsky-Lilly subgrid model and a simplified land-surface scheme, a sensitivity study to grid spacing is performed. At horizontal grid spacings ranging from 3.125 m in which we are capable of resolving most turbulence in the cases of interest to grid a spacing of 100 m which is clearly insufficient to resolve the NBL, the ability of LES to represent the NBL and the influence of NBL biases on the subsequent daytime development of the convective boundary layer are examined. Although the low-resolution experiments produce substantial biases in the NBL, the influence on daytime convection is shown to be small, with biases in the afternoon boundary layer depth and temperature of approximately 100 m and 0.5 K, which partially cancel each other in terms of the mixed-layer top relative humidity. Key Points: A resolution study for the diel cycle of dry convection in LES was performed Misrepresenting the NBL only has a small influence on daytime convection in LES Low-resolution LES can be appropriate to study the diel cycle of convection © 2015. The Authors.
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被引频次[WOS]:20   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/76032
Appears in Collections:影响、适应和脆弱性
气候变化与战略

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作者单位: Max Planck Institute for Meteorology, Hamburg, Germany; International Max Planck Research School on Earth System Modelling, Hamburg, Germany

Recommended Citation:
Van Stratum B,J,H,et al. The influence of misrepresenting the nocturnal boundary layer on idealized daytime convection in large-eddy simulation[J]. Journal of Advances in Modeling Earth Systems,2015-01-01,7(2)
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