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Current shear and t...
Current shear and turbulence during a near-inertial wave
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Rohrs, J. (author)
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Halsne, T. (author)
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Sutherland, G. (author)
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Dagestad, K. F. (author)
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Hole, L. R. (author)
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- Broström, Göran (author)
- Gothenburg University,Göteborgs universitet,Institutionen för marina vetenskaper,Department of marine sciences
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Christensen, K. H. (author)
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(creator_code:org_t)
- 2023
- 2023
- English.
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In: Frontiers in Marine Science. ; 10
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https://gup.ub.gu.se...
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https://doi.org/10.3...
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Abstract
Subject headings
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- Surface currents and turbulent mixing were observed during a near-inertial wave (NIW) using an accousting doppler current profiler (ADCP) and satellite-tracked drifters. Drifter trajectories sampled at three depth levels show characteristics of an Ekman solution superposed with the NIW. Velocity and dissipation estimates from the ADCP reveal strong shear with a distinct constant flux layer in between the roughness length and a critical depth at 4m. Below, a shear free slab layer performing an inertial oscillation is observed. Dissipation, as estimated from the vertical beam of the ADCP, peaks in the wave-enhanced friction layer when the current opposes the wind and wave direction. Below the constant flux layer, maximum turbulence is observed when the NIW is in a phase that is in opposite direction to the time-averaged current. During this phase, currents at various depths rapidly realign in the entire boundary layer.
Subject headings
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Keyword
- near-inertial wave
- surface current
- turbulence
- dissipation
- ADCP
- drifter trajectory
- dissipation
- wind
- Environmental Sciences & Ecology
- Marine & Freshwater Biology
Publication and Content Type
- ref (subject category)
- art (subject category)
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