DOI: 10.1002/2015GL063216
论文题名: Modification of turbulent dissipation rates by a deep Southern Ocean eddy
作者: Sheen K.L. ; Brearley J.A. ; Naveira Garabato A.C. ; Smeed D.A. ; Laurent L.S. ; Meredith M.P. ; Thurnherr A.M. ; Waterman S.N.
刊名: Geophysical Research Letters
ISSN: 0094-9548
EISSN: 1944-9279
出版年: 2015
卷: 42, 期: 9 起始页码: 3450
结束页码: 3457
语种: 英语
英文关键词: eddy
; internal waves
; mixing
; ray tracing
; Southern Ocean
; turbulent dissipation
Scopus关键词: Hydrographic surveys
; Mixing
; Ray tracing
; Wave energy conversion
; Boundary currents
; Eddy
; Geostrophic flow
; Internal waves
; Microstructure measurements
; Southern ocean
; Turbulent dissipation
; Turbulent dissipation rates
; Oceanography
; boundary current
; deep sea
; geostrophic flow
; internal wave
; turbulence
; wave energy
; wave field
; Southern Ocean
英文摘要: The impact of a mesoscale eddy on the magnitude and spatial distribution of diapycnal ocean mixing is investigated using a set of hydrographic and microstructure measurements collected in the Southern Ocean. These data sampled a baroclinic, middepth eddy formed during the disintegration of a deep boundary current. Turbulent dissipation is suppressed within the eddy but is elevated by up to an order of magnitude along the upper and lower eddy boundaries. A ray tracing approximation is employed as a heuristic device to elucidate how the internal wave field evolves in the ambient velocity and stratification conditions accompanying the eddy. These calculations are consistent with the observations, suggesting reflection of internal wave energy from the eddy center and enhanced breaking through critical layer processes along the eddy boundaries. These results have important implications for understanding where and how internal wave energy is dissipated in the presence of energetic deep geostrophic flows. Key Points Middepth Southern Ocean eddies impact local dissipation of internal wave energy Turbulent dissipation is enhanced on eddy periphery and suppressed in eddy core Ray tracing elucidates mechanisms by which internal waves evolve in ACC eddy ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930476904&doi=10.1002%2f2015GL063216&partnerID=40&md5=03a734d2b83899c3aaa3c943fc0bcee4
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9163
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: Ocean and Earth Sciences, University of Southampton, Southampton, United Kingdom
Recommended Citation:
Sheen K.L.,Brearley J.A.,Naveira Garabato A.C.,et al. Modification of turbulent dissipation rates by a deep Southern Ocean eddy[J]. Geophysical Research Letters,2015-01-01,42(9).