气候变化领域集成服务门户(CCPortal): An Eddy-Diffusivity Mass-Flux Parameterization for Modeling Oceanic Convection

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DOI	10.1029/2020MS002078
	An Eddy-Diffusivity Mass-Flux Parameterization for Modeling Oceanic Convection
	Giordani H.; Bourdallé-Badie R.; Madec G.
发表日期	2020
ISSN	19422466
卷号	12 期号:9
英文摘要	A new one-dimensional (1-D) parameterization of penetrative convection has been developed in order to have a better representation of the vertical mixing in ocean general circulation models. Our approach is inspired from atmospheric parameterizations of shallow convection which assumes that in the convective boundary layer, the subgrid-scale fluxes result from two different mixing scales: small eddies, which are represented by an Eddy-Diffusivity (ED) contribution, and large eddies associated with thermals, which are represented by a mass-flux contribution. In the present work, the local (small eddies) and nonlocal (large eddies) contributions are unified into an Eddy-Diffusivity-Mass-Flux (EDMF) parameterization which treats simultaneously the whole vertical mixing. EDMF is implemented in the community ocean model NEMO and tested in its 1-D column version. Deepening of dense water in analytic cases, successfully reproduced in LES simulations, is more realistic with EDMF than with standard diffusion parameterizations. Also the convective events observed in the western Mediterranean at the Lion station and in the North Pacific Ocean at the PAPA station are more realistic in terms of sequencing and amplitude with EDMF. © 2020. The Authors.
英文关键词	Convective plumes in ocean models; Eddy-Diffusivity Mass-Flux scheme; Local and non-local vertical mixing
语种	英语
scopus关键词	Atmospheric boundary layer; Boundary layer flow; Diffusion; Mixing; Oceanography; Convective boundary layers; Convective events; Eddy Diffusivities; Flux parameterization; North Pacific Ocean; Ocean general circulation models; Shallow convection; Western Mediterranean; Parameterization; air-sea interaction; atmosphere-ocean coupling; atmospheric convection; dense water; modeling; oceanic general circulation model; one-dimensional modeling; vertical mixing; Pacific Ocean; Pacific Ocean (North)
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156632
作者单位	CNRM/CNRS, UMR-3589, Météo-France, Toulouse, France; Mercator Ocean International, Ramonville, France; Sorbonne Universités, UPMC, Paris, France
推荐引用方式 GB/T 7714	Giordani H.,Bourdallé-Badie R.,Madec G.. An Eddy-Diffusivity Mass-Flux Parameterization for Modeling Oceanic Convection[J],2020,12(9).
APA	Giordani H.,Bourdallé-Badie R.,&Madec G..(2020).An Eddy-Diffusivity Mass-Flux Parameterization for Modeling Oceanic Convection.Journal of Advances in Modeling Earth Systems,12(9).
MLA	Giordani H.,et al."An Eddy-Diffusivity Mass-Flux Parameterization for Modeling Oceanic Convection".Journal of Advances in Modeling Earth Systems 12.9(2020).