Wind-Induced Topographic Rossby Waves in the Southwestern Slope of the Chukchi Abyssal Plain
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Le résumé fourni par la source
Abstract Near-bottom currents collected over 1 year (August 2021–22) using a current- and pressure-recording inverted echo sounder (CPIES) at a depth of 1060 m showed fluctuations within a frequency band between 2 and 6.5 days near the southwestern slope of the Chukchi Abyssal Plain. The amplitude of the fluctuations was approximately 8 cm s −1 on average during the summer months and weakened to approximately 3 cm s −1 between February and June 2022. Similar fluctuations were reproduced by the data-assimilated Hybrid Coordinate Ocean Model (HYCOM), confirming that they were bottom intensified. Calculations of the bottom-trapping scale using HYCOM revealed that these fluctuations could be attributed to topographic Rossby waves (TRWs) with a length scale of approximately 50 km. The spatial distributions of TRWs in HYCOM and ray-tracing results suggest that TRWs likely propagated from the west-southwest. It is suggested that these TRWs were triggered by nonlocal wind stress curl (WSC), 220 km to the west along the continental slope, as the coherence in the TRW frequency band between the TRWs and WSC was significant. The weaker TRW signal from February to June 2022 was related to weaker WSC and higher sea ice concentration in the study area. The stronger TRWs from July to October occurred when the WSC was stronger and the sea ice concentration was lower in the study area. Our findings imply that changes in the Arctic WSC field or a longer sea ice–free season could trigger more energetic and frequent TRWs, observable down to 1000-m depth around the southwestern slope of the Chukchi Abyssal Plain.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Wind-Induced Topographic Rossby Waves in the Southwestern Slope of the Chukchi Abyssal Plain
- Date Crossref
- 01/12/2025
- Éditeur
- American Meteorological Society
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Inha University Department of Ocean Sciences pays non établi dans la noticeUniversité ou école supérieure
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University of Rhode Island pays non établi dans la noticeUniversité ou école supérieure
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University-National Oceanographic Laboratory System pays non établi dans la noticeUniversité ou école supérieure
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Korea Institute of Ocean Science and Technology pays non établi dans la noticeStructure de recherche
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Pusan National University Department of Oceanography and Marine Research Institute pays non établi dans la noticeUniversité ou école supérieure
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Korea Polar Research Institute Division of Ocean and Atmosphere Sciences pays non établi dans la noticeStructure de recherche
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Massachusetts Institute of Technology Department of Mechanical Engineering pays non établi dans la noticeUniversité ou école supérieure
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Graduate School of Oceanography pays non établi dans la noticeUniversité ou école supérieure
Department of Ocean Sciences — Inha University, University of Rhode Island et University-National Oceanographic Laboratory System, avec 5 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.