Vertical structure of currents in the vicinity of the Iceland-Scotland Ridge
International audience An analysis of current profiles carried out on moored Acoustic Doppler Current Profiler data sets recorded during the Variability of Exchanges In the Northern Seas project is presented here for several locations in three sections in the vicinity of the Iceland-Scotland Ridge:...
Main Authors: | , , |
---|---|
Other Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2005
|
Subjects: | |
Online Access: | https://hal.science/hal-00317843 https://hal.science/hal-00317843/document https://hal.science/hal-00317843/file/angeo-23-1963-2005.pdf |
id |
ftinsu:oai:HAL:hal-00317843v1 |
---|---|
record_format |
openpolar |
spelling |
ftinsu:oai:HAL:hal-00317843v1 2023-11-12T04:16:58+01:00 Vertical structure of currents in the vicinity of the Iceland-Scotland Ridge Carollo, C. Astin, I. Graff, J. University of Chicago University of Bath Bath British Maritime Technology Ltd. Teddington 2005-09-15 https://hal.science/hal-00317843 https://hal.science/hal-00317843/document https://hal.science/hal-00317843/file/angeo-23-1963-2005.pdf en eng HAL CCSD European Geosciences Union hal-00317843 https://hal.science/hal-00317843 https://hal.science/hal-00317843/document https://hal.science/hal-00317843/file/angeo-23-1963-2005.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00317843 Annales Geophysicae, 2005, 23 (6), pp.1963-1975 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2005 ftinsu 2023-10-25T16:25:11Z International audience An analysis of current profiles carried out on moored Acoustic Doppler Current Profiler data sets recorded during the Variability of Exchanges In the Northern Seas project is presented here for several locations in three sections in the vicinity of the Iceland-Scotland Ridge: (1) north of the Faroes, (2) in the Faroe-Bank Channel and (3) in the Faroe-Shetland Channel. Total currents have been decomposed into three components, namely the mean residual flow, tide and surge. The mean residual flow is found to be dominant. Results for the major tidal constituents ( M 2 , S 2 , N 2 , O 1 and K 1 ) are shown and discussed. It is found that the predominant tidal harmonic M 2 becomes steered through depth to align with the bottom topography. The mean residual flow is found to be generally larger than the surge, particularly in the Faroe-Bank Channel below 500m depth where it is the dominant component. Here tidal rectification, i.e. the topographic rectification of tidal currents originating in nonlinearities that rectify the oscillatory tidal motion, is identified as the process enhancing the large mean residual currents found. From the current structure, two water masses are identified in the channel: the upper slowing moving inflow water and the colder outflow water characterised by a 3?6-day periodicity. In the Faroe-Shetland Channel the flow is characterised by large tidal currents, particularly in shallow waters. Instead, north of the Faroes none of the component was identified as dominant. The results show that the variability of the current components is strongly dependent upon topography and water depth. Keywords. Oceanography: Physical (Currents; General circulation; General or miscellaneous) Article in Journal/Newspaper Faroes Iceland Institut national des sciences de l'Univers: HAL-INSU Faroe Bank ENVELOPE(-8.667,-8.667,60.917,60.917) |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Carollo, C. Astin, I. Graff, J. Vertical structure of currents in the vicinity of the Iceland-Scotland Ridge |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience An analysis of current profiles carried out on moored Acoustic Doppler Current Profiler data sets recorded during the Variability of Exchanges In the Northern Seas project is presented here for several locations in three sections in the vicinity of the Iceland-Scotland Ridge: (1) north of the Faroes, (2) in the Faroe-Bank Channel and (3) in the Faroe-Shetland Channel. Total currents have been decomposed into three components, namely the mean residual flow, tide and surge. The mean residual flow is found to be dominant. Results for the major tidal constituents ( M 2 , S 2 , N 2 , O 1 and K 1 ) are shown and discussed. It is found that the predominant tidal harmonic M 2 becomes steered through depth to align with the bottom topography. The mean residual flow is found to be generally larger than the surge, particularly in the Faroe-Bank Channel below 500m depth where it is the dominant component. Here tidal rectification, i.e. the topographic rectification of tidal currents originating in nonlinearities that rectify the oscillatory tidal motion, is identified as the process enhancing the large mean residual currents found. From the current structure, two water masses are identified in the channel: the upper slowing moving inflow water and the colder outflow water characterised by a 3?6-day periodicity. In the Faroe-Shetland Channel the flow is characterised by large tidal currents, particularly in shallow waters. Instead, north of the Faroes none of the component was identified as dominant. The results show that the variability of the current components is strongly dependent upon topography and water depth. Keywords. Oceanography: Physical (Currents; General circulation; General or miscellaneous) |
author2 |
University of Chicago University of Bath Bath British Maritime Technology Ltd. Teddington |
format |
Article in Journal/Newspaper |
author |
Carollo, C. Astin, I. Graff, J. |
author_facet |
Carollo, C. Astin, I. Graff, J. |
author_sort |
Carollo, C. |
title |
Vertical structure of currents in the vicinity of the Iceland-Scotland Ridge |
title_short |
Vertical structure of currents in the vicinity of the Iceland-Scotland Ridge |
title_full |
Vertical structure of currents in the vicinity of the Iceland-Scotland Ridge |
title_fullStr |
Vertical structure of currents in the vicinity of the Iceland-Scotland Ridge |
title_full_unstemmed |
Vertical structure of currents in the vicinity of the Iceland-Scotland Ridge |
title_sort |
vertical structure of currents in the vicinity of the iceland-scotland ridge |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal.science/hal-00317843 https://hal.science/hal-00317843/document https://hal.science/hal-00317843/file/angeo-23-1963-2005.pdf |
long_lat |
ENVELOPE(-8.667,-8.667,60.917,60.917) |
geographic |
Faroe Bank |
geographic_facet |
Faroe Bank |
genre |
Faroes Iceland |
genre_facet |
Faroes Iceland |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00317843 Annales Geophysicae, 2005, 23 (6), pp.1963-1975 |
op_relation |
hal-00317843 https://hal.science/hal-00317843 https://hal.science/hal-00317843/document https://hal.science/hal-00317843/file/angeo-23-1963-2005.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782333984812826624 |