| DOI: | 10.1002/2014GL062755
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| 论文题名: | Tidal mixing processes amid small-scale, deep-ocean topography |
| 作者: | Dale A.C.; Inall M.E.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9033
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| EISSN: | 1944-8764
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| 出版年: | 2015
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| 卷: | 42, 期:2 | | 起始页码: | 484
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| 结束页码: | 491
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| 语种: | 英语
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| 英文关键词: | deep ocean
; gravity currents
; lee waves
; meridional overturning circulation
; overflows
; tidal mixing
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| Scopus关键词: | Boundary layers
; Mixing
; Oceanography
; Phase meters
; Planetary surface analysis
; Topography
; Deep ocean
; Gravity currents
; Lee waves
; Meridional overturning circulations
; Overflows
; Tidal mixing
; Ocean currents
; amplitude
; meridional circulation
; overturn
; tidal current
; topography
; turbulence
; wave field
; Atlantic Ocean
; Mid-Atlantic Ridge
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| 英文摘要: | The nature of tide-topography interaction reflects the topographic scales experienced by water parcels during their tidal excursions. In the deep ocean these scales are typically subkilometer, yet direct observations of tidal processes on such scales are lacking. At one site, a saddle amid steep and complex Mid-Atlantic Ridge topography, observations reveal tidally pulsed, bottom-trapped fronts, overflows, and lee waves in response to a tide combined with a mean flow of similar amplitude. The tidal pulsing of the fronts and overflows was only evident locally, and their phase became unpredictable over scales of hundreds of meters. Enhanced turbulence in a 100-200 m thick bottom boundary layer had an estimated dissipation rate of 2.6-×-10-2-W-m-2, exceeding the large-scale average of tidal dissipation in mid-ocean ridge environments but by less than an order of magnitude. This site was not a dissipation "hotspot," and the processes observed could provide widely distributed mixing to the meridional overturning circulation. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923575914&doi=10.1002%2f2014GL062755&partnerID=40&md5=8ff30a3a2974fd623c09991503321f5c
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8649
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| 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: | Scottish Association for Marine Science, Scottish Marine Institute, Oban, United Kingdom
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| Recommended Citation: | |
Dale A.C.,Inall M.E.. Tidal mixing processes amid small-scale, deep-ocean topography[J]. Geophysical Research Letters,2015-01-01,42(2).
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