气候变化领域集成服务门户(CCPortal): Large eddy simulations of the Martian convective boundary layer: Towards developing a new planetary boundary layer scheme

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DOI	10.1016/j.atmosres.2020.105381
	Large eddy simulations of the Martian convective boundary layer: Towards developing a new planetary boundary layer scheme
	Temel O.; Senel C.B.; Porchetta S.; Muñoz-Esparza D.; Mischna M.A.; Van Hoolst T.; van Beeck J.; Karatekin Ö.
发表日期	2021
ISSN	0169-8095
卷号	250
英文摘要	The grid resolutions typically employed in atmospheric global circulation and mesoscale models are not sufficient to explicitly resolve the turbulence processes within the planetary boundary layer (PBL). turbulent fluxes are, therefore, fully parameterized in those models, based on empirical relationships for the mixing length scale using PBL schemes. However, microscale models use the large-eddy simulation (LES) technique to resolve turbulence processes. Here, we perform LES computations for the daytime Martian planetary boundary layer, ranging from weakly to strong convective conditions, using the Mars implementation of planetWRF, the MarsWRF model. In this study, our main focus is to investigate the turbulence statistics and turbulent spectrum utilizing our LES results. Then, using the computed turbulence kinetic energy and its dissipation rate, a generic formulation for the mixing length scale variation in the Martian convective boundary layer is proposed. This mixing length formulation is used to derive a Mars-specific PBL scheme and its performance is compared to the PBL scheme currently in use by the MarsWRF model, the MRF scheme. The proposed scheme is tested both in global and mesoscale simulations, which are used to evaluate the convective boundary layer height and near-surface meteorology conditions at the InSight landing site. The presently proposed PBL scheme results in an improved prediction of convective boundary layer height that agree better with the observational estimations acquired by radio occultations of Mars Express in comparison to the MRF scheme. Also, the prediction of near-surface winds at the InSight landing site is slightly improved. © 2020 Elsevier B.V.
英文关键词	Large eddy simulation; Mars; Planetary boundary layer
语种	英语
scopus关键词	Atmospheric boundary layer; Boundary layer flow; Kinetic energy; Kinetics; Large eddy simulation; Magnetorheological fluids; Mixing; Turbulence; Convective boundary layers; Empirical relationships; Large Eddy simulation techniques; Mesoscale simulation; Mixing-length formulations; Planetary boundary layers; Turbulence kinetic energy; Turbulence statistics; Atmospheric thermodynamics; atmospheric convection; atmospheric modeling; boundary layer; convective boundary layer; large eddy simulation; Mars; turbulence
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162251
作者单位	KU Leuven, Institute of Astronomy, Leuven, Belgium; Royal Observatory of Belgium, Brussels, Belgium; von Karman Institute for Fluid Dynamics, Rhode-St-Genese, Belgium; National Center for Atmospheric ResearchCO, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, United States
推荐引用方式 GB/T 7714	Temel O.,Senel C.B.,Porchetta S.,et al. Large eddy simulations of the Martian convective boundary layer: Towards developing a new planetary boundary layer scheme[J],2021,250.
APA	Temel O..,Senel C.B..,Porchetta S..,Muñoz-Esparza D..,Mischna M.A..,...&Karatekin Ö..(2021).Large eddy simulations of the Martian convective boundary layer: Towards developing a new planetary boundary layer scheme.Atmospheric Research,250.
MLA	Temel O.,et al."Large eddy simulations of the Martian convective boundary layer: Towards developing a new planetary boundary layer scheme".Atmospheric Research 250(2021).