The physical oceanography of Fortune Bay, an overview
This paper describes the physical oceanography of Fortune Bay, a broad, mid-latitude fjord located in Newfoundland (Canada). Fortune Bay is subject to a strong seasonal stratification (0–16 °C sea-surface temperature range with up to 1 °C/m vertical gradient) influenced by local freshwater runoff, w...
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ftarchimer:oai:archimer.ifremer.fr:91241 2023-05-15T17:22:52+02:00 The physical oceanography of Fortune Bay, an overview Donnet, Sebastien Lazure, Pascal Ratsimandresy, Andry Han, Guoqi 2022-11 application/pdf https://archimer.ifremer.fr/doc/00800/91241/97001.pdf https://archimer.ifremer.fr/doc/00800/91241/97002.docx https://doi.org/10.1016/j.rsma.2022.102698 https://archimer.ifremer.fr/doc/00800/91241/ eng eng Elsevier BV https://archimer.ifremer.fr/doc/00800/91241/97001.pdf https://archimer.ifremer.fr/doc/00800/91241/97002.docx doi:10.1016/j.rsma.2022.102698 https://archimer.ifremer.fr/doc/00800/91241/ info:eu-repo/semantics/openAccess restricted use Regional Studies In Marine Science (2352-4855) (Elsevier BV), 2022-11 , Vol. 56 , P. 102698 (21p.) Broad fjord Hydrographic climate Wind Tides Circulation Along-shore current pulses Water exchanges text Publication info:eu-repo/semantics/article 2022 ftarchimer https://doi.org/10.1016/j.rsma.2022.102698 2023-01-17T23:50:42Z This paper describes the physical oceanography of Fortune Bay, a broad, mid-latitude fjord located in Newfoundland (Canada). Fortune Bay is subject to a strong seasonal stratification (0–16 °C sea-surface temperature range with up to 1 °C/m vertical gradient) influenced by local freshwater runoff, wind forcing and shelf inputs. Sea-ice is seldom present in the bay and unlikely to be of importance on the seasonal stratification and mixing processes. Fortune Bay is warmer than its adjacent shelf both at the surface (by about 2 °C) and at intermediate depths (by about 1 °C from 50–150 m). While the former is likely due to local freshwater runoff stratification influence, the latter is probably related to the warm, deep water input occurring in winter below sill depth and subsequently mixed with the intermediate layer via the input of a colder water mass flowing in summer and which eventually reaches the bottom as well. Currents are dominated by the ‘weather band’ (2–20 d) and characterized by energetic pulses associated with downwelling and upwelling events. Mean circulation is rather weak and the seasonal pattern obtained her e did not reveal either the presence of a distinct estuarine circulation nor a strong influence of the main coastal current. Tidal currents are weak also and no inertial signal was observed. Estimates of water exchange between the inner and outer part of the bay were calculated using several methods and led to residence times of the order of a few to several months for the upper layers and of the order of a year for the bottom layer with a probable strong seasonal variability (larger residence time in summer for the upper layers). The “baroclinic pumping” processes, which include the downwelling/upwelling events, appear to be important players but more work is needed to better understand their nature and actual contribution. Article in Journal/Newspaper Newfoundland Sea ice Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Canada Regional Studies in Marine Science 56 102698 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Broad fjord Hydrographic climate Wind Tides Circulation Along-shore current pulses Water exchanges |
spellingShingle |
Broad fjord Hydrographic climate Wind Tides Circulation Along-shore current pulses Water exchanges Donnet, Sebastien Lazure, Pascal Ratsimandresy, Andry Han, Guoqi The physical oceanography of Fortune Bay, an overview |
topic_facet |
Broad fjord Hydrographic climate Wind Tides Circulation Along-shore current pulses Water exchanges |
description |
This paper describes the physical oceanography of Fortune Bay, a broad, mid-latitude fjord located in Newfoundland (Canada). Fortune Bay is subject to a strong seasonal stratification (0–16 °C sea-surface temperature range with up to 1 °C/m vertical gradient) influenced by local freshwater runoff, wind forcing and shelf inputs. Sea-ice is seldom present in the bay and unlikely to be of importance on the seasonal stratification and mixing processes. Fortune Bay is warmer than its adjacent shelf both at the surface (by about 2 °C) and at intermediate depths (by about 1 °C from 50–150 m). While the former is likely due to local freshwater runoff stratification influence, the latter is probably related to the warm, deep water input occurring in winter below sill depth and subsequently mixed with the intermediate layer via the input of a colder water mass flowing in summer and which eventually reaches the bottom as well. Currents are dominated by the ‘weather band’ (2–20 d) and characterized by energetic pulses associated with downwelling and upwelling events. Mean circulation is rather weak and the seasonal pattern obtained her e did not reveal either the presence of a distinct estuarine circulation nor a strong influence of the main coastal current. Tidal currents are weak also and no inertial signal was observed. Estimates of water exchange between the inner and outer part of the bay were calculated using several methods and led to residence times of the order of a few to several months for the upper layers and of the order of a year for the bottom layer with a probable strong seasonal variability (larger residence time in summer for the upper layers). The “baroclinic pumping” processes, which include the downwelling/upwelling events, appear to be important players but more work is needed to better understand their nature and actual contribution. |
format |
Article in Journal/Newspaper |
author |
Donnet, Sebastien Lazure, Pascal Ratsimandresy, Andry Han, Guoqi |
author_facet |
Donnet, Sebastien Lazure, Pascal Ratsimandresy, Andry Han, Guoqi |
author_sort |
Donnet, Sebastien |
title |
The physical oceanography of Fortune Bay, an overview |
title_short |
The physical oceanography of Fortune Bay, an overview |
title_full |
The physical oceanography of Fortune Bay, an overview |
title_fullStr |
The physical oceanography of Fortune Bay, an overview |
title_full_unstemmed |
The physical oceanography of Fortune Bay, an overview |
title_sort |
physical oceanography of fortune bay, an overview |
publisher |
Elsevier BV |
publishDate |
2022 |
url |
https://archimer.ifremer.fr/doc/00800/91241/97001.pdf https://archimer.ifremer.fr/doc/00800/91241/97002.docx https://doi.org/10.1016/j.rsma.2022.102698 https://archimer.ifremer.fr/doc/00800/91241/ |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Newfoundland Sea ice |
genre_facet |
Newfoundland Sea ice |
op_source |
Regional Studies In Marine Science (2352-4855) (Elsevier BV), 2022-11 , Vol. 56 , P. 102698 (21p.) |
op_relation |
https://archimer.ifremer.fr/doc/00800/91241/97001.pdf https://archimer.ifremer.fr/doc/00800/91241/97002.docx doi:10.1016/j.rsma.2022.102698 https://archimer.ifremer.fr/doc/00800/91241/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1016/j.rsma.2022.102698 |
container_title |
Regional Studies in Marine Science |
container_volume |
56 |
container_start_page |
102698 |
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1766109757744087040 |