globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1904087116
论文题名:
Rapid mixing and exchange of deep-ocean waters in an abyssal boundary current
作者: Naveira Garabato A.C.; Frajka-Williams E.E.; Spingys C.P.; Legg S.; Polzin K.L.; Forryan A.; Povl Abrahamsen E.; Buckingham C.E.; Griffies S.M.; McPhail S.D.; Nicholls K.W.; Thomas L.N.; Meredith M.P.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2019
卷: 116, 期:27
起始页码: 13233
结束页码: 13238
语种: 英语
英文关键词: Ocean mixing ; Overturning circulation ; Submesoscale instabilities ; Turbulence
Scopus关键词: article ; sea ; Southern Ocean
英文摘要: The overturning circulation of the global ocean is critically shaped by deep-ocean mixing, which transforms cold waters sinking at high latitudes into warmer, shallower waters. The effectiveness of mixing in driving this transformation is jointly set by two factors: the intensity of turbulence near topography and the rate at which well-mixed boundary waters are exchanged with the stratified ocean interior. Here, we use innovative observations of a major branch of the overturning circulation—an abyssal boundary current in the Southern Ocean—to identify a previously undocumented mixing mechanism, by which deep-ocean waters are efficiently laundered through intensified near-boundary turbulence and boundary–interior exchange. The linchpin of the mechanism is the generation of submesoscale dynamical instabilities by the flow of deep-ocean waters along a steep topographic boundary. As the conditions conducive to this mode of mixing are common to many abyssal boundary currents, our findings highlight an imperative for its representation in models of oceanic overturning. © 2019 National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163596
Appears in Collections:气候变化与战略

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作者单位: Naveira Garabato, A.C., Ocean and Earth Science, National Oceanography Centre, University of Southampton, Southampton, SO14 3ZH, United Kingdom; Frajka-Williams, E.E., National Oceanography Centre, Southampton, SO14 3ZH, United Kingdom; Spingys, C.P., Ocean and Earth Science, National Oceanography Centre, University of Southampton, Southampton, SO14 3ZH, United Kingdom; Legg, S., National Oceanic and Atmospheric Administration Geophysical Fluid Dynamics Laboratory and Atmospheric and Oceanic Sciences Program, Princeton University, Princeton, NJ 08544, United States; Polzin, K.L., Department of Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States; Forryan, A., Ocean and Earth Science, National Oceanography Centre, University of Southampton, Southampton, SO14 3ZH, United Kingdom; Povl Abrahamsen, E., Polar Oceans, British Antarctic Survey, Cambridge, CB3 0ET, United Kingdom; Buckingham, C.E., Polar Oceans, British Antarctic Survey, Cambridge, CB3 0ET, United Kingdom; Griffies, S.M., National Oceanic and Atmospheric Administration Geophysical Fluid Dynamics Laboratory and Atmospheric and Oceanic Sciences Program, Princeton University, Princeton, NJ 08544, United States; McPhail, S.D., National Oceanography Centre, Southampton, SO14 3ZH, United Kingdom; Nicholls, K.W., Polar Oceans, British Antarctic Survey, Cambridge, CB3 0ET, United Kingdom; Thomas, L.N., Department of Earth System Science, Stanford University, Stanford, CA 94305, United States; Meredith, M.P., Polar Oceans, British Antarctic Survey, Cambridge, CB3 0ET, United Kingdom

Recommended Citation:
Naveira Garabato A.C.,Frajka-Williams E.E.,Spingys C.P.,et al. Rapid mixing and exchange of deep-ocean waters in an abyssal boundary current[J]. Proceedings of the National Academy of Sciences of the United States of America,2019-01-01,116(27)
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