气候变化领域集成服务门户(CCPortal): Rapid mixing and exchange of deep-ocean waters in an abyssal boundary current

CCPortal

DOI	10.1073/pnas.1904087116
	Rapid mixing and exchange of deep-ocean waters in an abyssal boundary current
	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.
发表日期	2019
ISSN	0027-8424
起始页码	13233
结束页码	13238
卷号	116 期号:27
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.
英文关键词	Ocean mixing; Overturning circulation; Submesoscale instabilities; Turbulence
语种	英语
scopus关键词	article; sea; Southern Ocean
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160403
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 Kin...
推荐引用方式 GB/T 7714	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],2019,116(27).
APA	Naveira Garabato A.C..,Frajka-Williams E.E..,Spingys C.P..,Legg S..,Polzin K.L..,...&Meredith M.P..(2019).Rapid mixing and exchange of deep-ocean waters in an abyssal boundary current.Proceedings of the National Academy of Sciences of the United States of America,116(27).
MLA	Naveira Garabato A.C.,et al."Rapid mixing and exchange of deep-ocean waters in an abyssal boundary current".Proceedings of the National Academy of Sciences of the United States of America 116.27(2019).