Summertime Bottom Temperatures on the Southeast Shoal of the Grand Bank, and Implications for Exchange Rates
From spring to fall, the Southeast Shoal usually has the warmest bottom water on the entire Grand Bank of Newfoundland. Historical hydrographic data indicate that the elevated lower-layer temperatures are derived from the seasonal surface heat input, through vertical exchange across the developing t...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Canadian Science Publishing
1991
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Online Access: | http://dx.doi.org/10.1139/f91-158 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-158 |
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crcansciencepubl:10.1139/f91-158 2023-12-17T10:44:54+01:00 Summertime Bottom Temperatures on the Southeast Shoal of the Grand Bank, and Implications for Exchange Rates Loder, John W. 1991 http://dx.doi.org/10.1139/f91-158 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-158 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 48, issue 7, page 1316-1325 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1991 crcansciencepubl https://doi.org/10.1139/f91-158 2023-11-19T13:39:01Z From spring to fall, the Southeast Shoal usually has the warmest bottom water on the entire Grand Bank of Newfoundland. Historical hydrographic data indicate that the elevated lower-layer temperatures are derived from the seasonal surface heat input, through vertical exchange across the developing thermocline in combination with the shallow depths of the Shoal. However, in some months, the surface fluxes required by the monthly changes in depth-integrated heat content over the Shoal exceed climatological flux estimates computed using bulk formulae, suggesting that the climatological estimates may be low. The seasonal evolution of the lower-layer temperature provides information on the rates of vertical exchange across the thermocline and horizontal exchange in the lower layer. A seasonal variation in the vertical exchange coefficient, with an approximately inverse relation to the vertical density difference, and significant horizontal exchange in summer are suggested. The associated rates are quantified with a crude axisymmetric model for the lower layer's monthly heat budget. Article in Journal/Newspaper Newfoundland Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences 48 7 1316 1325 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Loder, John W. Summertime Bottom Temperatures on the Southeast Shoal of the Grand Bank, and Implications for Exchange Rates |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
From spring to fall, the Southeast Shoal usually has the warmest bottom water on the entire Grand Bank of Newfoundland. Historical hydrographic data indicate that the elevated lower-layer temperatures are derived from the seasonal surface heat input, through vertical exchange across the developing thermocline in combination with the shallow depths of the Shoal. However, in some months, the surface fluxes required by the monthly changes in depth-integrated heat content over the Shoal exceed climatological flux estimates computed using bulk formulae, suggesting that the climatological estimates may be low. The seasonal evolution of the lower-layer temperature provides information on the rates of vertical exchange across the thermocline and horizontal exchange in the lower layer. A seasonal variation in the vertical exchange coefficient, with an approximately inverse relation to the vertical density difference, and significant horizontal exchange in summer are suggested. The associated rates are quantified with a crude axisymmetric model for the lower layer's monthly heat budget. |
format |
Article in Journal/Newspaper |
author |
Loder, John W. |
author_facet |
Loder, John W. |
author_sort |
Loder, John W. |
title |
Summertime Bottom Temperatures on the Southeast Shoal of the Grand Bank, and Implications for Exchange Rates |
title_short |
Summertime Bottom Temperatures on the Southeast Shoal of the Grand Bank, and Implications for Exchange Rates |
title_full |
Summertime Bottom Temperatures on the Southeast Shoal of the Grand Bank, and Implications for Exchange Rates |
title_fullStr |
Summertime Bottom Temperatures on the Southeast Shoal of the Grand Bank, and Implications for Exchange Rates |
title_full_unstemmed |
Summertime Bottom Temperatures on the Southeast Shoal of the Grand Bank, and Implications for Exchange Rates |
title_sort |
summertime bottom temperatures on the southeast shoal of the grand bank, and implications for exchange rates |
publisher |
Canadian Science Publishing |
publishDate |
1991 |
url |
http://dx.doi.org/10.1139/f91-158 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-158 |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 48, issue 7, page 1316-1325 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f91-158 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
48 |
container_issue |
7 |
container_start_page |
1316 |
op_container_end_page |
1325 |
_version_ |
1785564404681539584 |