气候变化领域集成服务门户(CCPortal): Mixing efficiency in the ocean

CCPortal

DOI	10.1146/annurev-marine-121916-063643
	Mixing efficiency in the ocean
	Gregg M.C.; D'Asaro E.A.; Riley J.J.; Kunze E.
发表日期	2018
ISSN	1941-1405
起始页码	443
结束页码	473
卷号	10
英文摘要	Mixing efficiency is the ratio of the net change in potential energy to the energy expended in producing the mixing. Parameterizations of efficiency and of related mixing coefficients are needed to estimate diapycnal diffusivity from measurements of the turbulent dissipation rate. Comparing diffusivities from microstructure profiling with those inferred from the thickening rate of four simultaneous tracer releases has verified, within observational accuracy, 0.2 as the mixing coefficient over a 30-fold range of diapycnal diffusivities. Although some mixing coefficients can be estimated from pycnocline measurements, at present mixing efficiency must be obtained from channel flows, laboratory experiments, and numerical simulations. Reviewing the different approaches demonstrates that estimates and parameterizations for mixing efficiency and coefficients are not converging beyond the at-sea comparisons with tracer releases, leading to recommendations for a community approach to address this important issue. Copyright © 2018 by Annual Reviews. All rights reserved.
英文关键词	diapycnal diffusivity; differential diffusion; Kelvin-Helmholtz instability; mixing coefficient; mixing efficiency; stratified turbulence
语种	英语
scopus关键词	Diffusion; Oceanography; Parameter estimation; Potential energy; Diapycnal diffusivity; Differential diffusion; Kelvin- helmholtz instabilities; Mixing coefficient; Mixing efficiency; Stratified turbulence; Mixing; accuracy assessment; channel flow; comparative study; diffusivity; dissipation; experimental study; isopycnal layer; Kelvin-Helmholtz instability; microstructure; mixing ratio; numerical method; parameterization; potential energy; turbulence; sea water; Atlantic Ocean; chemistry; hydrodynamics; Pacific Ocean; sea; theoretical model; water flow; Atlantic Ocean; Hydrodynamics; Models, Theoretical; Oceans and Seas; Pacific Ocean; Seawater; Water Movements
来源期刊	Annual Review of Marine Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/161943
作者单位	Applied Physics Laboratory, School of Oceanography, University of Washington, Seattle, WA 98105, United States; Department of Mechanical Engineering, University of Washington, Seattle, WA 98195, United States; Northwest Research Assoc., Redmond, WA 98052, United States
推荐引用方式 GB/T 7714	Gregg M.C.,D'Asaro E.A.,Riley J.J.,et al. Mixing efficiency in the ocean[J],2018,10.
APA	Gregg M.C.,D'Asaro E.A.,Riley J.J.,&Kunze E..(2018).Mixing efficiency in the ocean.Annual Review of Marine Science,10.
MLA	Gregg M.C.,et al."Mixing efficiency in the ocean".Annual Review of Marine Science 10(2018).