Diagnosing transit times on the northwestern North Atlantic continental shelf
The circulation in the northwestern North Atlantic Ocean is highly complex, characterized by the confluence of two major western boundary current systems and several shelf currents. Here we present the first comprehensive analysis of transport paths and timescales for the northwestern North Atlantic...
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Language: | English |
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Copernicus Publications
2018
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00004379 2023-05-15T17:29:41+02:00 Diagnosing transit times on the northwestern North Atlantic continental shelf Rutherford, Krysten Fennel, Katja 2018-10 electronic https://doi.org/10.5194/os-14-1207-2018 https://noa.gwlb.de/receive/cop_mods_00004379 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00004336/os-14-1207-2018.pdf https://os.copernicus.org/articles/14/1207/2018/os-14-1207-2018.pdf eng eng Copernicus Publications Ocean Science -- http://www.bibliothek.uni-regensburg.de/ezeit/?2183769 -- http://www.copernicus.org/EGU/os/os.html -- 1812-0792 https://doi.org/10.5194/os-14-1207-2018 https://noa.gwlb.de/receive/cop_mods_00004379 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00004336/os-14-1207-2018.pdf https://os.copernicus.org/articles/14/1207/2018/os-14-1207-2018.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2018 ftnonlinearchiv https://doi.org/10.5194/os-14-1207-2018 2022-02-08T23:00:09Z The circulation in the northwestern North Atlantic Ocean is highly complex, characterized by the confluence of two major western boundary current systems and several shelf currents. Here we present the first comprehensive analysis of transport paths and timescales for the northwestern North Atlantic shelf, which is useful for estimating ventilation rates, describing circulation and mixing, characterizing the composition of water masses with respect to different source regions, and elucidating rates and patterns of biogeochemical processing, species dispersal, and genetic connectivity. Our analysis uses dye and age tracers within a high-resolution circulation model of the region, divided into nine subregions, to diagnose retention times, transport pathways, and transit times. Retention times are shortest on the Scotian Shelf (∼ 3 months), where the inshore and shelf-break branches of the coastal current system result in high along-shelf transport to the southwest, and on the Grand Banks (∼ 3 months). Larger retention times are simulated in the Gulf of St. Lawrence (∼ 12 months) and the Gulf of Maine (∼ 6 months). Source water analysis shows that Scotian Shelf water is primarily comprised of waters from the Grand Banks and Gulf of St. Lawrence, with varying composition across the shelf. Contributions from the Gulf of St. Lawrence are larger at near-shore locations, whereas locations near the shelf break have larger contributions from the Grand Banks and slope waters. Waters from the deep slope have little connectivity with the shelf, because the shelf-break current inhibits transport across the shelf break. Grand Banks and Gulf of St. Lawrence waters are therefore dominant controls on biogeochemical properties, and on setting and sustaining planktonic communities on the Scotian Shelf. Article in Journal/Newspaper North Atlantic Niedersächsisches Online-Archiv NOA Ocean Science 14 5 1207 1221 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Rutherford, Krysten Fennel, Katja Diagnosing transit times on the northwestern North Atlantic continental shelf |
topic_facet |
article Verlagsveröffentlichung |
description |
The circulation in the northwestern North Atlantic Ocean is highly complex, characterized by the confluence of two major western boundary current systems and several shelf currents. Here we present the first comprehensive analysis of transport paths and timescales for the northwestern North Atlantic shelf, which is useful for estimating ventilation rates, describing circulation and mixing, characterizing the composition of water masses with respect to different source regions, and elucidating rates and patterns of biogeochemical processing, species dispersal, and genetic connectivity. Our analysis uses dye and age tracers within a high-resolution circulation model of the region, divided into nine subregions, to diagnose retention times, transport pathways, and transit times. Retention times are shortest on the Scotian Shelf (∼ 3 months), where the inshore and shelf-break branches of the coastal current system result in high along-shelf transport to the southwest, and on the Grand Banks (∼ 3 months). Larger retention times are simulated in the Gulf of St. Lawrence (∼ 12 months) and the Gulf of Maine (∼ 6 months). Source water analysis shows that Scotian Shelf water is primarily comprised of waters from the Grand Banks and Gulf of St. Lawrence, with varying composition across the shelf. Contributions from the Gulf of St. Lawrence are larger at near-shore locations, whereas locations near the shelf break have larger contributions from the Grand Banks and slope waters. Waters from the deep slope have little connectivity with the shelf, because the shelf-break current inhibits transport across the shelf break. Grand Banks and Gulf of St. Lawrence waters are therefore dominant controls on biogeochemical properties, and on setting and sustaining planktonic communities on the Scotian Shelf. |
format |
Article in Journal/Newspaper |
author |
Rutherford, Krysten Fennel, Katja |
author_facet |
Rutherford, Krysten Fennel, Katja |
author_sort |
Rutherford, Krysten |
title |
Diagnosing transit times on the northwestern North Atlantic continental shelf |
title_short |
Diagnosing transit times on the northwestern North Atlantic continental shelf |
title_full |
Diagnosing transit times on the northwestern North Atlantic continental shelf |
title_fullStr |
Diagnosing transit times on the northwestern North Atlantic continental shelf |
title_full_unstemmed |
Diagnosing transit times on the northwestern North Atlantic continental shelf |
title_sort |
diagnosing transit times on the northwestern north atlantic continental shelf |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/os-14-1207-2018 https://noa.gwlb.de/receive/cop_mods_00004379 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00004336/os-14-1207-2018.pdf https://os.copernicus.org/articles/14/1207/2018/os-14-1207-2018.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Ocean Science -- http://www.bibliothek.uni-regensburg.de/ezeit/?2183769 -- http://www.copernicus.org/EGU/os/os.html -- 1812-0792 https://doi.org/10.5194/os-14-1207-2018 https://noa.gwlb.de/receive/cop_mods_00004379 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00004336/os-14-1207-2018.pdf https://os.copernicus.org/articles/14/1207/2018/os-14-1207-2018.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/os-14-1207-2018 |
container_title |
Ocean Science |
container_volume |
14 |
container_issue |
5 |
container_start_page |
1207 |
op_container_end_page |
1221 |
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1766124463362932736 |