气候变化领域集成服务门户(CCPortal): A Breakdown in Potential Vorticity Estimation Delineates the Submesoscale-to-Turbulence Boundary in Large Eddy Simulations

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DOI	10.1029/2020MS002049
	A Breakdown in Potential Vorticity Estimation Delineates the Submesoscale-to-Turbulence Boundary in Large Eddy Simulations
	Bodner A.S.; Fox-Kemper B.
发表日期	2020
ISSN	19422466
卷号	12 期号:10
英文摘要	Most submesoscale motions—fronts, eddies, filaments, and even large internal waves—are sufficiently rapidly rotating and stratified as to be strongly influenced by potential vorticity dynamics. Below the Ozmidov scale where turbulence overturns and isotropizes, potential vorticity is not commonly considered. Here, it is shown that in Large Eddy Simulations, the velocity gradients, buoyancy gradients, and potential vorticity are strongly influenced by grid-scale processes. Grid-scale processes in Large Eddy Simulations, as opposed to those in Direct Numerical Simulations, imply that spuriously noisy potential vorticity variance will become increasingly dominant as resolution increases—analogous to ultraviolet catastrophe. A solution, the prefiltered potential vorticity, is shown to be effective in linking the potential vorticity dynamics of the submesoscale to the nearly-isotropic turbulent fluxes beyond the Ozmidov scale, and a derivation is provided for a set of closed conservation equations for use in interpreting potential vorticity dynamics in Large Eddy Simulations. This diagnostic approach is exceptional in that Large Eddy Simulation analysis and hydrostatic ocean modeling with parameterized turbulence analysis are harmonized. © 2020. The Authors.
语种	英语
scopus关键词	Turbulence; Vorticity; Conservation equations; Diagnostic approach; Hydrostatic ocean; Potential vorticity; Potential vorticity dynamics; Resolution increase; Turbulence analysis; Velocity gradients; Large eddy simulation; boundary layer; large eddy simulation; potential vorticity; turbulence; turbulent boundary layer
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/156613
作者单位	Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI, United States
推荐引用方式 GB/T 7714	Bodner A.S.,Fox-Kemper B.. A Breakdown in Potential Vorticity Estimation Delineates the Submesoscale-to-Turbulence Boundary in Large Eddy Simulations[J],2020,12(10).
APA	Bodner A.S.,&Fox-Kemper B..(2020).A Breakdown in Potential Vorticity Estimation Delineates the Submesoscale-to-Turbulence Boundary in Large Eddy Simulations.Journal of Advances in Modeling Earth Systems,12(10).
MLA	Bodner A.S.,et al."A Breakdown in Potential Vorticity Estimation Delineates the Submesoscale-to-Turbulence Boundary in Large Eddy Simulations".Journal of Advances in Modeling Earth Systems 12.10(2020).