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Momentum Flux Balan...
Momentum Flux Balance at the Air-Sea Interface
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- Qiao, Wenli (author)
- Uppsala universitet,Luft-, vatten- och landskapslära,Ocean College, Zhejiang University, Zhoushan, China
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- Wu, Lichuan (author)
- Uppsala universitet,Luft-, vatten- och landskapslära
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- Song, Jinbao (author)
- Ocean College, Zhejiang University, Zhoushan, China
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- Li, Xue (author)
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
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- Qiao, Fangli (author)
- Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China;First Institute of Oceanography, Ministry of Natural Resources, Qingdao, China
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- Rutgersson, Anna, 1971- (author)
- Uppsala universitet,Luft-, vatten- och landskapslära
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(creator_code:org_t)
- American Geophysical Union (AGU), 2021
- 2021
- English.
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In: Journal of Geophysical Research - Oceans. - : American Geophysical Union (AGU). - 2169-9275 .- 2169-9291. ; 126:2
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https://doi.org/10.1...
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Abstract
Subject headings
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- Abstract Ocean waves can spatiotemporally redistribute the momentum flux at the air-sea interface, which varies with the sea state. Traditional atmosphere-ocean coupled systems assume the ocean-side stress (Ïoc) to be identical to the air-side stress (Ïa); consequently, the role of ocean waves is neglected. In this study, the wave impacts on the air-sea momentum flux are investigated based on 1-year high-resolution model simulations in the Baltic Sea using an atmosphere-wave coupled model (Uppsala University-Coupled Model, UU-CM). The simulation results show that Ïoc can differ significantly from Ïa in both direction and magnitude. The direction difference between Ïoc and Ïa (DD(Ïoc, Ïa)) and the normalized momentum flux () decrease with increasing inverse wave age. In general, and DD(Ïoc, Ïa) are pronounced under wind-following swell and wind-crossing swell conditions, respectively. The occurrence frequencies of large and DD(Ïoc, Ïa) are higher nearer the coast; statistically, both decrease significantly with increasing water depth because of the joint effect of dissipation processes. Based on four selected areas, we find that alongshore winds (winds blowing parallel to the coastline) are favorable for large angular differences between Ïoc and Ïa (DD(Ïoc, Ïa) > 5°). However, onshore winds predominate at . The Ïa in the wave model is generally less than that obtained from the atmospheric model under low-moderate wind conditions if the wave model feeds only the Charnock coefficient (roughness length) back to the atmospheric model in coupled systems.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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