DOI: 10.1002/2014GL060716
论文题名: Double-diffusive interfaces in Lake Kivu reproduced by direct numerical simulations
作者: Sommer T. ; Carpenter J.R. ; Wüest A.
刊名: Geophysical Research Letters
ISSN: 0094-9915
EISSN: 1944-9646
出版年: 2014
卷: 41, 期: 14 起始页码: 5114
结束页码: 5121
语种: 英语
英文关键词: density flux ratio
; direct numerical simulation
; double diffusion
; interface fluxes
; Lake Kivu
; microstructure
Scopus关键词: Direct numerical simulation
; Lakes
; Microstructure
; Density fluxes
; Density ratio
; Double diffusion
; Double-diffusive interfaces
; Flux parameterization
; Lake Kivu
; Microstructure measurements
; Vertical heat fluxes
; Heat flux
; comparative study
; diffusion
; estimation method
; heat flux
; interface
; microstructure
; mixed layer
; parameterization
; simulation
; East African Lakes
; Lake Kivu
英文摘要: Double diffusion transforms uniform background gradients of temperature and salinity into "staircases" of homogeneous mixed layers that are separated by high-gradient interfaces. Direct numerical simulations (DNS) and microstructure measurements are two independent methods of estimating double-diffusive fluxes. By performing DNS under similar conditions as found in our measurements in Lake Kivu, we are able to compare results from both methods for the first time. We find that (i) the DNS reproduces the measured interface thicknesses of in situ microstructure profiles, (ii) molecular heat fluxes through interfaces capture the total vertical heat fluxes for density ratios larger than three, and (iii) the commonly used heat flux parameterization underestimates the total fluxes by a factor of 1.3 to 2.2. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904840989&doi=10.1002%2f2014GL060716&partnerID=40&md5=8dfca3774f94128e7ed14a35fcdaf49a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7179
Appears in Collections: 气候减缓与适应
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作者单位: Eawag, Surface Waters-Research and Management, Kastanienbaum, Switzerland
Recommended Citation:
Sommer T.,Carpenter J.R.,Wüest A.. Double-diffusive interfaces in Lake Kivu reproduced by direct numerical simulations[J]. Geophysical Research Letters,2014-01-01,41(14).