| DOI: | 10.1002/2013GL058967
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| 论文题名: | Flow and mixing in Juan de Fuca Canyon, Washington |
| 作者: | Alford M.H.; Maccready P.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-10276
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| EISSN: | 1944-10007
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| 出版年: | 2014
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| 卷: | 41, 期:5 | | 起始页码: | 1608
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| 结束页码: | 1615
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| 语种: | 英语
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| 英文关键词: | coastal
; hydraulics
; internal waves
; mixing
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| Scopus关键词: | Hydraulic machinery
; Hydraulics
; Oceanography
; coastal
; Continental shelves
; Estuarine systems
; Hydraulic control
; Internal hydraulic
; Internal waves
; Momentum balances
; Water-mass properties
; Mixing
; canyon
; estuarine environment
; internal wave
; lee wave
; mixing
; shelf break
; sill
; tidal modeling
; turbulent flow
; water mass
; Juan de Fuca Strait
; Pacific Ocean
; Salish Sea
; United States
; Washington [United States]
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| 英文摘要: | We report breaking internal lee waves, strong mixing, and hydraulic control associated with wind-driven up-canyon flow in Juan de Fuca Canyon, Washington. Unlike the flow above the canyon rim, which shows a tidal modulation typical on continental shelves, the flow within the canyon is persistently up-canyon during our observations, with isopycnals tilted consistent with a geostrophic cross-canyon momentum balance. As the flow encounters a sill near the canyon entrance at the shelf break, it accelerates significantly and undergoes elevated mixing on the upstream and downstream sides of the sill. On the downstream side, a strong lee wave response is seen, with displacements of O(100 m) and overturns tens of meters high. The resulting diffusivity is O(10-2 m2 s-1), sufficient to substantially modify coastal water masses as they transit the canyon and enter the Salish Sea estuarine system. Key Points We observe a hydraulically controlled, wind-driven up-canyon flow The flow is strongly turbulent because of breaking internal hydraulic jumps The mixing is strong enough to modify water mass properties transiting the sill ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84894594623&doi=10.1002%2f2013GL058967&partnerID=40&md5=83d5e8b9401ff33b12a03afbb46566a0
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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/7540
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Applied Physics Laboratory, University of Washington, Seattle WA, United States
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| Recommended Citation: | |
Alford M.H.,Maccready P.. Flow and mixing in Juan de Fuca Canyon, Washington[J]. Geophysical Research Letters,2014-01-01,41(5).
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