Norwegian Sea overflow through the Faroe-Shetland gateway as documented by its bedforms
We have used seabed information from three deep-tow side-scan sonar surveys in order to trace the high-energy current core of Norwegian Sea Overflow Water (NSOW) from the Faroe–Shetland Channel (FSC) through the Faroe Bank Channel (FBC) towards the southern flank of the Iceland–Faroe Ridge. A hierar...
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2002
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ftsouthampton:oai:eprints.soton.ac.uk:43909 2023-07-30T04:03:26+02:00 Norwegian Sea overflow through the Faroe-Shetland gateway as documented by its bedforms Kuijpers, A. Hansen, B. Huehnerbach, V. Larsen, B. Nielsen, T. Werner, F. 2002 https://eprints.soton.ac.uk/43909/ unknown Kuijpers, A., Hansen, B., Huehnerbach, V., Larsen, B., Nielsen, T. and Werner, F. (2002) Norwegian Sea overflow through the Faroe-Shetland gateway as documented by its bedforms. Marine Geology, 188 (1-2), 147-164. (doi:10.1016/S0025-3227(02)00279-7 <http://dx.doi.org/10.1016/S0025-3227(02)00279-7>). Article PeerReviewed 2002 ftsouthampton https://doi.org/10.1016/S0025-3227(02)00279-7 2023-07-09T20:50:48Z We have used seabed information from three deep-tow side-scan sonar surveys in order to trace the high-energy current core of Norwegian Sea Overflow Water (NSOW) from the Faroe–Shetland Channel (FSC) through the Faroe Bank Channel (FBC) towards the southern flank of the Iceland–Faroe Ridge. A hierarchy of bedform types was used for estimating maximum mean near-bottom current speed, which has been compared with results from current meter measurements. We conclude that in the FSC maximum mean NSOW near-bottom flow speed at some sites may occasionally approach or even exceed 1.0 m/s. Both seabed data and oceanographic information indicate that the current core is concentrated along the Faroes slope at the 500–600-m depth stratum. With a change of the large-scale channel topography towards the southern extremity of the Faroe Plateau, where the FSC turns west towards the FBC, the slope current core gradually descends towards basin depth. Along the Wyville–Thomson Ridge (1100–1200 m water depth) maximum mean NSOW near-bottom current speed decreases slightly towards the west as the high-speed current core runs upslope the ridge. At the entrance to the narrow channel between Faroe Bank and the Faroe Plateau funnelling results in a renewed current acceleration at basin depth. Seabed evidence shows that further west in the FBC the NSOW high-speed current core is detached from the channel floor over larger areas. From the FBC outlet most of the overflow waters continue as a high-energy contour current concentrated along the southern flank of the Iceland–Faroe Ridge between 600 and 1000 m water depth. Article in Journal/Newspaper Faroes Iceland Norwegian Sea University of Southampton: e-Prints Soton Norwegian Sea Faroe Bank ENVELOPE(-8.667,-8.667,60.917,60.917) Wyville Thomson Ridge ENVELOPE(-7.500,-7.500,60.250,60.250) Wyville-Thomson Ridge ENVELOPE(-7.250,-7.250,60.000,60.000) Marine Geology 188 1-2 147 164 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
unknown |
description |
We have used seabed information from three deep-tow side-scan sonar surveys in order to trace the high-energy current core of Norwegian Sea Overflow Water (NSOW) from the Faroe–Shetland Channel (FSC) through the Faroe Bank Channel (FBC) towards the southern flank of the Iceland–Faroe Ridge. A hierarchy of bedform types was used for estimating maximum mean near-bottom current speed, which has been compared with results from current meter measurements. We conclude that in the FSC maximum mean NSOW near-bottom flow speed at some sites may occasionally approach or even exceed 1.0 m/s. Both seabed data and oceanographic information indicate that the current core is concentrated along the Faroes slope at the 500–600-m depth stratum. With a change of the large-scale channel topography towards the southern extremity of the Faroe Plateau, where the FSC turns west towards the FBC, the slope current core gradually descends towards basin depth. Along the Wyville–Thomson Ridge (1100–1200 m water depth) maximum mean NSOW near-bottom current speed decreases slightly towards the west as the high-speed current core runs upslope the ridge. At the entrance to the narrow channel between Faroe Bank and the Faroe Plateau funnelling results in a renewed current acceleration at basin depth. Seabed evidence shows that further west in the FBC the NSOW high-speed current core is detached from the channel floor over larger areas. From the FBC outlet most of the overflow waters continue as a high-energy contour current concentrated along the southern flank of the Iceland–Faroe Ridge between 600 and 1000 m water depth. |
format |
Article in Journal/Newspaper |
author |
Kuijpers, A. Hansen, B. Huehnerbach, V. Larsen, B. Nielsen, T. Werner, F. |
spellingShingle |
Kuijpers, A. Hansen, B. Huehnerbach, V. Larsen, B. Nielsen, T. Werner, F. Norwegian Sea overflow through the Faroe-Shetland gateway as documented by its bedforms |
author_facet |
Kuijpers, A. Hansen, B. Huehnerbach, V. Larsen, B. Nielsen, T. Werner, F. |
author_sort |
Kuijpers, A. |
title |
Norwegian Sea overflow through the Faroe-Shetland gateway as documented by its bedforms |
title_short |
Norwegian Sea overflow through the Faroe-Shetland gateway as documented by its bedforms |
title_full |
Norwegian Sea overflow through the Faroe-Shetland gateway as documented by its bedforms |
title_fullStr |
Norwegian Sea overflow through the Faroe-Shetland gateway as documented by its bedforms |
title_full_unstemmed |
Norwegian Sea overflow through the Faroe-Shetland gateway as documented by its bedforms |
title_sort |
norwegian sea overflow through the faroe-shetland gateway as documented by its bedforms |
publishDate |
2002 |
url |
https://eprints.soton.ac.uk/43909/ |
long_lat |
ENVELOPE(-8.667,-8.667,60.917,60.917) ENVELOPE(-7.500,-7.500,60.250,60.250) ENVELOPE(-7.250,-7.250,60.000,60.000) |
geographic |
Norwegian Sea Faroe Bank Wyville Thomson Ridge Wyville-Thomson Ridge |
geographic_facet |
Norwegian Sea Faroe Bank Wyville Thomson Ridge Wyville-Thomson Ridge |
genre |
Faroes Iceland Norwegian Sea |
genre_facet |
Faroes Iceland Norwegian Sea |
op_relation |
Kuijpers, A., Hansen, B., Huehnerbach, V., Larsen, B., Nielsen, T. and Werner, F. (2002) Norwegian Sea overflow through the Faroe-Shetland gateway as documented by its bedforms. Marine Geology, 188 (1-2), 147-164. (doi:10.1016/S0025-3227(02)00279-7 <http://dx.doi.org/10.1016/S0025-3227(02)00279-7>). |
op_doi |
https://doi.org/10.1016/S0025-3227(02)00279-7 |
container_title |
Marine Geology |
container_volume |
188 |
container_issue |
1-2 |
container_start_page |
147 |
op_container_end_page |
164 |
_version_ |
1772814424674926592 |