DOI: 10.1002/2016GL068184
论文题名: A new characterization of the turbulent diapycnal diffusivities of mass and momentum in the ocean
作者: Salehipour H. ; Peltier W.R. ; Whalen C.B. ; MacKinnon J.A.
刊名: Geophysical Research Letters
ISSN: 0094-9168
EISSN: 1944-8899
出版年: 2016
卷: 43, 期: 7 起始页码: 3370
结束页码: 3379
语种: 英语
英文关键词: Argo float
; mixing efficiency
; ocean diapycnal mixing
; stratified turbulence
; turbulent Prandtl number
Scopus关键词: Diffusion
; Efficiency
; Mixing
; Momentum
; Prandtl number
; Turbulence
; Argo float
; Diapycnal mixing
; Mixing efficiency
; Stratified turbulence
; Turbulent Prandtl number
; Oceanography
英文摘要: The diapycnal diffusivity of mass supported by turbulent events in the ocean interior plays a fundamental role in controlling the global overturning circulation. The conventional representation of this diffusivity, due to Osborn (1980), assumes a constant mixing efficiency. We replace this methodology by a generalized-Osborn formula which involves a mixing efficiency that varies nonmonotonically with at least two nondimensional variables. Using these two variables, we propose dynamic parameterizations for mixing efficiency and turbulent Prandtl number (the latter quantifies the ratio of momentum to mass diapycnal diffusivities) based on the first synthesis of an extensive direct numerical simulation of inhomogeneously stratified shear-induced turbulence. Data from Argo floats are employed to demonstrate the extent of the spatial and statistical variability to be expected in both the diapycnal diffusivities of mass and momentum. We therefore suggest that previous estimates of these important characteristics of the global ocean require reconsideration. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84963550633&doi=10.1002%2f2016GL068184&partnerID=40&md5=5350ed8dc7a6c067a28cf8ce9d2254cd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10131
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Physics, University of Toronto, Toronto, ON, Canada
Recommended Citation:
Salehipour H.,Peltier W.R.,Whalen C.B.,et al. A new characterization of the turbulent diapycnal diffusivities of mass and momentum in the ocean[J]. Geophysical Research Letters,2016-01-01,43(7).