Experimental and numerical investigation of shelf flow crossing over a strait

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Author(s)Kuehl, Joseph
Author(s)Sheremet, Vitalii A.
Date Accessioned2024-06-25T19:57:09Z
Date Available2024-06-25T19:57:09Z
Publication Date2024-05-20
DescriptionThis article was originally published in Ocean Dynamics. The version of record is available at: https://doi.org/10.1007/s10236-024-01617-8. © The Author(s) 2024. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
AbstractMotivated by the phenomenon of Scotian Shelf Crossover events, the problem of a shelf flow that is interrupted by a strait is considered. Laboratory experiments in a rotating tank with barotropic and baroclinic flow over flat and sloping shelves confirm that the flow is steered by the bathymetric contours and mainly circumnavigates the gulf. In order to jump across the strait, as suggested by earlier theories, the flow must have unrealistically high Rossby numbers. However, the near bottom friction relaxes the bathymetric constraint and causes the formation of a peculiar jet crossing the strait diagonally. For the dissipation values such that a half of the transport goes around the gulf and half crosses the strait diagonally, the diagonal crossover jet becomes most evident. Numerical solutions for realistic values of the frictional parameter reproduce the results of the laboratory experiments and consideration of the actual Gulf of Maine bathymetry reproduces patterns similar to those observed by drift trajectories and in the satellite derived sea surface temperature fields.
SponsorThe work was launched with the support from the National Science Foundation Grant OCE-0351518. Continuing efforts to the fruition of this work have been with support from the National Science Foundation Grant number 1823452 and the Texas General Land Office Grant number 18-130-000-A670. The initial experiments were conducted on a 1m turntable at the Geophysical Fluid Dynamics Laboratory of the Graduate School of Oceanography, University of Rhode Island. The later experiments were conducted on a 2m turn table at the Geophysical Fluid Dynamics Laboratory at Woods Hole Oceanographic Institution.
CitationKuehl, J., Sheremet, V.A. Experimental and numerical investigation of shelf flow crossing over a strait. Ocean Dynamics 74, 525–537 (2024). https://doi.org/10.1007/s10236-024-01617-8
ISSN1616-7228
URLhttps://udspace.udel.edu/handle/19716/34537
Languageen_US
PublisherOcean Dynamics
dc.rightsAttribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
Keywordsgeophysical fluid dynamics
Keywordstopographic control
Keywordsshelf flow
TitleExperimental and numerical investigation of shelf flow crossing over a strait
TypeArticle
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