Rectified tidal transport in Lofoten–Vesterålen, northern Norway
Vestfjorden in northern Norway, a major spawning ground for the northeast Arctic cod, is sheltered from the continental shelf and open ocean by the Lofoten–Vesterålen archipelago. The archipelago, however, is well known for hosting strong and vigorous tidal currents in its many straits, currents tha...
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Language: | English |
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Copernicus Publications
2021
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Online Access: | https://doi.org/10.5194/os-17-1753-2021 https://doaj.org/article/d3ac4eb106ae4ed5a8f9b33a1338ae43 |
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ftdoajarticles:oai:doaj.org/article:d3ac4eb106ae4ed5a8f9b33a1338ae43 2023-05-15T14:30:30+02:00 Rectified tidal transport in Lofoten–Vesterålen, northern Norway E. Børve P. E. Isachsen O. A. Nøst 2021-12-01T00:00:00Z https://doi.org/10.5194/os-17-1753-2021 https://doaj.org/article/d3ac4eb106ae4ed5a8f9b33a1338ae43 EN eng Copernicus Publications https://os.copernicus.org/articles/17/1753/2021/os-17-1753-2021.pdf https://doaj.org/toc/1812-0784 https://doaj.org/toc/1812-0792 doi:10.5194/os-17-1753-2021 1812-0784 1812-0792 https://doaj.org/article/d3ac4eb106ae4ed5a8f9b33a1338ae43 Ocean Science, Vol 17, Pp 1753-1773 (2021) Geography. Anthropology. Recreation G Environmental sciences GE1-350 article 2021 ftdoajarticles https://doi.org/10.5194/os-17-1753-2021 2022-12-31T09:20:45Z Vestfjorden in northern Norway, a major spawning ground for the northeast Arctic cod, is sheltered from the continental shelf and open ocean by the Lofoten–Vesterålen archipelago. The archipelago, however, is well known for hosting strong and vigorous tidal currents in its many straits, currents that can produce significant time-mean tracer transport from Vestfjorden to the shelf outside. We use a purely tidally driven unstructured-grid ocean model to look into non-linear tidal dynamics and the associated tracer transport through the archipelago. Of particular interest are two processes: tidal pumping through the straits and tidal rectification around islands. The most prominent tracer transport is caused by tidal pumping through the short and strongly non-linear straits Nordlandsflaget and Moskstraumen near the southern tip of the archipelago. Here, tracers from Vestfjorden are transported tens of kilometers westward out on the outer shelf. Further north, weaker yet notable tidal pumping also takes place through the longer straits Nappstraumen and Gimsøystraumen. The other main transport route out of Vestfjorden is south of the island of Røst. Here, the transport is primarily due to tracer advection by rectified anticyclonic currents around the island. There is also an anticyclonic circulation cell around the island group Mosken–Værøy, and both cells have flow speeds up to 0.2 m s −1 , magnitudes similar to the observed background currents in the region. These high-resolution simulations thus emphasize the importance of non-linear tidal dynamics for transport of floating particles, like cod eggs and larvae, in the region. Article in Journal/Newspaper Arctic cod Arctic Lofoten Northeast Arctic cod Northern Norway Røst Vesterålen Vestfjorden Værøy Directory of Open Access Journals: DOAJ Articles Arctic Lofoten Norway Vesterålen ENVELOPE(14.939,14.939,68.754,68.754) Røst ENVELOPE(11.983,11.983,67.467,67.467) Værøy ENVELOPE(12.693,12.693,67.664,67.664) Mosken ENVELOPE(12.755,12.755,67.746,67.746) Gimsøystraumen ENVELOPE(14.301,14.301,68.303,68.303) Ocean Science 17 6 1753 1773 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
spellingShingle |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 E. Børve P. E. Isachsen O. A. Nøst Rectified tidal transport in Lofoten–Vesterålen, northern Norway |
topic_facet |
Geography. Anthropology. Recreation G Environmental sciences GE1-350 |
description |
Vestfjorden in northern Norway, a major spawning ground for the northeast Arctic cod, is sheltered from the continental shelf and open ocean by the Lofoten–Vesterålen archipelago. The archipelago, however, is well known for hosting strong and vigorous tidal currents in its many straits, currents that can produce significant time-mean tracer transport from Vestfjorden to the shelf outside. We use a purely tidally driven unstructured-grid ocean model to look into non-linear tidal dynamics and the associated tracer transport through the archipelago. Of particular interest are two processes: tidal pumping through the straits and tidal rectification around islands. The most prominent tracer transport is caused by tidal pumping through the short and strongly non-linear straits Nordlandsflaget and Moskstraumen near the southern tip of the archipelago. Here, tracers from Vestfjorden are transported tens of kilometers westward out on the outer shelf. Further north, weaker yet notable tidal pumping also takes place through the longer straits Nappstraumen and Gimsøystraumen. The other main transport route out of Vestfjorden is south of the island of Røst. Here, the transport is primarily due to tracer advection by rectified anticyclonic currents around the island. There is also an anticyclonic circulation cell around the island group Mosken–Værøy, and both cells have flow speeds up to 0.2 m s −1 , magnitudes similar to the observed background currents in the region. These high-resolution simulations thus emphasize the importance of non-linear tidal dynamics for transport of floating particles, like cod eggs and larvae, in the region. |
format |
Article in Journal/Newspaper |
author |
E. Børve P. E. Isachsen O. A. Nøst |
author_facet |
E. Børve P. E. Isachsen O. A. Nøst |
author_sort |
E. Børve |
title |
Rectified tidal transport in Lofoten–Vesterålen, northern Norway |
title_short |
Rectified tidal transport in Lofoten–Vesterålen, northern Norway |
title_full |
Rectified tidal transport in Lofoten–Vesterålen, northern Norway |
title_fullStr |
Rectified tidal transport in Lofoten–Vesterålen, northern Norway |
title_full_unstemmed |
Rectified tidal transport in Lofoten–Vesterålen, northern Norway |
title_sort |
rectified tidal transport in lofoten–vesterålen, northern norway |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/os-17-1753-2021 https://doaj.org/article/d3ac4eb106ae4ed5a8f9b33a1338ae43 |
long_lat |
ENVELOPE(14.939,14.939,68.754,68.754) ENVELOPE(11.983,11.983,67.467,67.467) ENVELOPE(12.693,12.693,67.664,67.664) ENVELOPE(12.755,12.755,67.746,67.746) ENVELOPE(14.301,14.301,68.303,68.303) |
geographic |
Arctic Lofoten Norway Vesterålen Røst Værøy Mosken Gimsøystraumen |
geographic_facet |
Arctic Lofoten Norway Vesterålen Røst Værøy Mosken Gimsøystraumen |
genre |
Arctic cod Arctic Lofoten Northeast Arctic cod Northern Norway Røst Vesterålen Vestfjorden Værøy |
genre_facet |
Arctic cod Arctic Lofoten Northeast Arctic cod Northern Norway Røst Vesterålen Vestfjorden Værøy |
op_source |
Ocean Science, Vol 17, Pp 1753-1773 (2021) |
op_relation |
https://os.copernicus.org/articles/17/1753/2021/os-17-1753-2021.pdf https://doaj.org/toc/1812-0784 https://doaj.org/toc/1812-0792 doi:10.5194/os-17-1753-2021 1812-0784 1812-0792 https://doaj.org/article/d3ac4eb106ae4ed5a8f9b33a1338ae43 |
op_doi |
https://doi.org/10.5194/os-17-1753-2021 |
container_title |
Ocean Science |
container_volume |
17 |
container_issue |
6 |
container_start_page |
1753 |
op_container_end_page |
1773 |
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1766304342387720192 |