DOI: 10.1002/grl.50872
论文题名: The geography of semidiurnal mode-1 internal-tide energy loss
作者: Kelly S.M. ; Jones N.L. ; Nash J.D. ; Waterhouse A.F.
刊名: Geophysical Research Letters
ISSN: 0094-8622
EISSN: 1944-8353
出版年: 2013
卷: 40, 期: 17 起始页码: 4689
结束页码: 4693
语种: 英语
英文关键词: energy dissipation
; internal tides
; internal waves
; physical oceanography
; tides
Scopus关键词: Continental shelves
; Internal tides
; Internal waves
; Long-distance propagation
; Physical oceanography
; Scattering co-efficient
; Semi-analytical model
; Topographic features
; Scattering
; Submarine geology
; Tides
; Energy dissipation
; continental shelf
; energy dissipation
; internal tide
; physical oceanography
; stratification
; surface
; tide
; topography
; turbulent mixing
英文摘要: The semidiurnal mode-1 internal tide receives 0.1-0.3 TW from the surface tide and is capable of propagating across ocean basins. The ultimate fate of mode-1 energy after long-distance propagation is poorly constrained by existing observations and numerical simulations. Here, global results from a two-dimensional semi-analytical model indicate that topographic scattering is inefficient at most locations deeper than 2500 m. Next, results from a one-dimensional linear model with realistic topography and stratification create a map of mode-1 scattering coefficients along the continental margins. On average, mode-1 internal tides lose about 60% of their energy upon impacting the continental margins: 20% transmits onto the continental shelf, 40% scatters to higher modes, and 40% reflects back to the ocean interior. These analyses indicate that the majority of mode-1 energy is likely lost at large topographic features (e.g., continental slopes, seamounts, and mid-ocean ridges), where it may drive elevated turbulent mixing. Key Points About 10% of mode-1 tide energy is lost in the ocean basins below 2500 m depth 2/3 of mode-1 tide energy is lost during reflection at the continental margins Mode-1 energy losses during reflection at oblique and normal angles are similar ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84883450005&doi=10.1002%2fgrl.50872&partnerID=40&md5=50e500ebe8af35ee8e0883e508bc4221
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5886
Appears in Collections: 气候减缓与适应
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作者单位: Oceans Institute and School of Environmental Systems Engineering, University of Western Australia, Crawley, WA, Australia
Recommended Citation:
Kelly S.M.,Jones N.L.,Nash J.D.,et al. The geography of semidiurnal mode-1 internal-tide energy loss[J]. Geophysical Research Letters,2013-01-01,40(17).