DOI: 10.1002/2015GL066472
论文题名: Evidence for seafloor-intensified mixing by surface-generated equatorial waves
作者: Holmes R.M. ; Moum J.N. ; Thomas L.N.
刊名: Geophysical Research Letters
ISSN: 0094-9428
EISSN: 1944-9159
出版年: 2016
卷: 43, 期: 3 起始页码: 1202
结束页码: 1210
语种: 英语
英文关键词: abyssal mixing
; equatorial waves
; microstructure
; turbulence
Scopus关键词: Microstructure
; Topography
; Turbulence
; Abyssal mixing
; Earth's rotation
; Equatorial Pacific
; Equatorial waves
; Inertial instability
; Intense mixing
; Possible mechanisms
; Turbulence profile
; Mixing
; abyssal circulation
; dense water
; Earth rotation
; equatorial wave
; lee wave
; microstructure
; seafloor
; topography
; turbulence
; turbulent mixing
; Pacific Ocean
; Pacific Ocean (Equatorial)
英文摘要: Little is known about mixing in the abyssal equatorial oceans in spite of its inferred importance for upwelling dense water. Here we present full-depth microstructure turbulence profiles obtained in the equatorial Pacific that show evidence for intense wind-generated abyssal mixing. Mixing was intensified over the bottom 700 m where the diffusivity reached 10-3 m2 s-1, of similar intensity to mixing driven by tidal flow over rough topography. However, here the mixing was found over smooth topography. We suggest that the intense mixing could have been driven by surface-generated equatorial waves through two possible mechanisms: (1) near-bottom wave trapping as a result of the horizontal component of the Earth's rotation and (2) inertial instability. The generation of lee waves over smooth topography at low latitudes and their subsequent breaking is another viable mechanism for the mixing. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84961287092&doi=10.1002%2f2015GL066472&partnerID=40&md5=7844c5fe6937fef7293beac1594246c9
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10391
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: Department of Earth System Science, Stanford University, Stanford, CA, United States
Recommended Citation:
Holmes R.M.,Moum J.N.,Thomas L.N.. Evidence for seafloor-intensified mixing by surface-generated equatorial waves[J]. Geophysical Research Letters,2016-01-01,43(3).