Cross-Shelf and Out-of-Bay Transport Driven by an Open-Ocean Current
This paper studies the interaction of an Antarctic Circumpolar Current (ACC)–like wind-driven channel flow with a continental slope and a flat-bottomed bay-shaped shelf near the channel’s southern boundary. Interaction between the model ACC and the topography in the second layer induces local change...
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ftmit:oai:dspace.mit.edu:1721.1/72530 2023-06-11T04:06:54+02:00 Cross-Shelf and Out-of-Bay Transport Driven by an Open-Ocean Current Flierl, Glenn Richard Zhang, Yu Pedlosky, Joseph Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Flierl, Glenn Richard 2011-01 application/pdf http://hdl.handle.net/1721.1/72530 en_US eng American Meteorological Society http://dx.doi.org/10.1175/jpo-d-11-08.1 Journal of Physical Oceanography 1520-0485 0022-3670 http://hdl.handle.net/1721.1/72530 Zhang, Yu, Joseph Pedlosky, Glenn R. Flierl, 2011: Cross-Shelf and Out-of-Bay Transport Driven by an Open-Ocean Current. J. Phys. Oceanogr., 41, 2168–2186. © 2012 American Meteorological Society orcid:0000-0003-3589-5249 Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. Oxford Article http://purl.org/eprint/type/JournalArticle 2011 ftmit https://doi.org/10.1175/jpo-d-11-08.1 2023-05-29T08:54:03Z This paper studies the interaction of an Antarctic Circumpolar Current (ACC)–like wind-driven channel flow with a continental slope and a flat-bottomed bay-shaped shelf near the channel’s southern boundary. Interaction between the model ACC and the topography in the second layer induces local changes of the potential vorticity (PV) flux, which further causes the formation of a first-layer PV front near the base of the topography. Located between the ACC and the first-layer slope, the newly formed PV front is constantly perturbed by the ACC and in turn forces the first-layer slope with its own variability in an intermittent but persistent way. The volume transport of the slope water across the first-layer slope edge is mostly directly driven by eddies and meanders of the new front, and its magnitude is similar to the maximum Ekman transport in the channel. Near the bay’s opening, the effect of the topographic waves, excited by offshore variability, dominates the cross-isobath exchange and induces a mean clockwise shelf circulation. The waves’ propagation is only toward the west and tends to be blocked by the bay’s western boundary in the narrow-shelf region. The ensuing wave–coast interaction amplifies the wave amplitude and the cross-shelf transport. Because the interaction only occurs near the western boundary, the shelf water in the west of the bay is more readily carried offshore than that in the east and the mean shelf circulation is also intensified along the bay’s western boundary. Article in Journal/Newspaper Antarc* Antarctic DSpace@MIT (Massachusetts Institute of Technology) Antarctic Journal of Physical Oceanography 41 11 2168 2186 |
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Open Polar |
collection |
DSpace@MIT (Massachusetts Institute of Technology) |
op_collection_id |
ftmit |
language |
English |
description |
This paper studies the interaction of an Antarctic Circumpolar Current (ACC)–like wind-driven channel flow with a continental slope and a flat-bottomed bay-shaped shelf near the channel’s southern boundary. Interaction between the model ACC and the topography in the second layer induces local changes of the potential vorticity (PV) flux, which further causes the formation of a first-layer PV front near the base of the topography. Located between the ACC and the first-layer slope, the newly formed PV front is constantly perturbed by the ACC and in turn forces the first-layer slope with its own variability in an intermittent but persistent way. The volume transport of the slope water across the first-layer slope edge is mostly directly driven by eddies and meanders of the new front, and its magnitude is similar to the maximum Ekman transport in the channel. Near the bay’s opening, the effect of the topographic waves, excited by offshore variability, dominates the cross-isobath exchange and induces a mean clockwise shelf circulation. The waves’ propagation is only toward the west and tends to be blocked by the bay’s western boundary in the narrow-shelf region. The ensuing wave–coast interaction amplifies the wave amplitude and the cross-shelf transport. Because the interaction only occurs near the western boundary, the shelf water in the west of the bay is more readily carried offshore than that in the east and the mean shelf circulation is also intensified along the bay’s western boundary. |
author2 |
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Flierl, Glenn Richard |
format |
Article in Journal/Newspaper |
author |
Flierl, Glenn Richard Zhang, Yu Pedlosky, Joseph |
spellingShingle |
Flierl, Glenn Richard Zhang, Yu Pedlosky, Joseph Cross-Shelf and Out-of-Bay Transport Driven by an Open-Ocean Current |
author_facet |
Flierl, Glenn Richard Zhang, Yu Pedlosky, Joseph |
author_sort |
Flierl, Glenn Richard |
title |
Cross-Shelf and Out-of-Bay Transport Driven by an Open-Ocean Current |
title_short |
Cross-Shelf and Out-of-Bay Transport Driven by an Open-Ocean Current |
title_full |
Cross-Shelf and Out-of-Bay Transport Driven by an Open-Ocean Current |
title_fullStr |
Cross-Shelf and Out-of-Bay Transport Driven by an Open-Ocean Current |
title_full_unstemmed |
Cross-Shelf and Out-of-Bay Transport Driven by an Open-Ocean Current |
title_sort |
cross-shelf and out-of-bay transport driven by an open-ocean current |
publisher |
American Meteorological Society |
publishDate |
2011 |
url |
http://hdl.handle.net/1721.1/72530 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Oxford |
op_relation |
http://dx.doi.org/10.1175/jpo-d-11-08.1 Journal of Physical Oceanography 1520-0485 0022-3670 http://hdl.handle.net/1721.1/72530 Zhang, Yu, Joseph Pedlosky, Glenn R. Flierl, 2011: Cross-Shelf and Out-of-Bay Transport Driven by an Open-Ocean Current. J. Phys. Oceanogr., 41, 2168–2186. © 2012 American Meteorological Society orcid:0000-0003-3589-5249 |
op_rights |
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. |
op_doi |
https://doi.org/10.1175/jpo-d-11-08.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
41 |
container_issue |
11 |
container_start_page |
2168 |
op_container_end_page |
2186 |
_version_ |
1768379130438483968 |