DOI: 10.1002/2014GL060571
论文题名: The quest for an unambiguous parameterization of mixing efficiency in stably stratified geophysical flows
作者: Mater B.D. ; Venayagamoorthy S.K.
刊名: Geophysical Research Letters
ISSN: 0094-10004
EISSN: 1944-9735
出版年: 2014
卷: 41, 期: 13 起始页码: 4646
结束页码: 4653
语种: 英语
英文关键词: diapycnal mixing
; geophysical flows
; mixing efficiency
; parameterizations
; stably stratified turbulent flows
Scopus关键词: Buoyancy
; Efficiency
; Geophysics
; Mixing
; Oceanography
; Reynolds number
; Shear flow
; Turbulent flow
; Diagnostic ability
; Diapycnal mixing
; Field observations
; Geophysical flows
; Mixing efficiency
; parameterizations
; Richardson number
; Single parameter
; Parameterization
英文摘要: Estimates of turbulent mixing in geophysical settings typically depend on the efficiency at which shear-driven turbulence mixes density across isopycnals. To date, however, no unifying parameterization of diapycnal mixing efficiency exists due to the variability of natural flows and also due to certain ambiguities that arise from descriptions based on a single parameter. Here we highlight important ambiguities of some common single-parameter schemes in the context of a multiparameter framework that considers the independent effects of shear, buoyancy, and viscosity. Parameterizations based on the gradient Richardson number (Ri), the turbulent Froude number (FrT), and the buoyancy Reynolds number (Reb) are considered. The diagnostic ability of these parameters is examined using published data from both direct numerical simulations and field observations. Key Points We highlight important ambiguities of some common single-parameter schemes The findings will be useful for modeling geophysical flows ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904086767&doi=10.1002%2f2014GL060571&partnerID=40&md5=e175b35ce1d04013bcaeea4af37c1459
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7268
Appears in Collections: 气候减缓与适应
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作者单位: Department of Civil and Environmental Engineering, Colorado State University, Fort Collins CO, United States
Recommended Citation:
Mater B.D.,Venayagamoorthy S.K.. The quest for an unambiguous parameterization of mixing efficiency in stably stratified geophysical flows[J]. Geophysical Research Letters,2014-01-01,41(13).