Recirculation of the Canary current in fall 2014
Hydrographic measurements together with Ship mounted Acoustic Doppler Current Profilers and Lowered Acoustic Doppler Current Profilers (LADCP) obtained in October 2014 are used to describe water masses, geostrophic circulation and mass transport of the Canary Current System, as the Eastern Boundary...
Published in: | Journal of Marine Systems |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | http://hdl.handle.net/10553/35386 https://doi.org/10.1016/j.jmarsys.2017.04.002 |
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ftunivlaspalmas:oai:accedacris.ulpgc.es:10553/35386 2023-05-15T13:45:50+02:00 Recirculation of the Canary current in fall 2014 Hernandez-Guerra, Alonso Espino-Falcon, Elisabet Vélez Belchí,Pedro Perez Hernandez, Maria Dolores Martinez-Marrero, Antonio Cana, Luis Hernandez-Guerra, Alonso Martinez-Marrero, Antonio Perez-Hernandez, Maria Cana-Cascallar, Luis Velez-Belchi, Pedro 56455072400 57194228679 7801599223 57194227854 24390812600 8153672300 660191 13796944 1378362 3057975 4990325 4176723 2017 http://hdl.handle.net/10553/35386 https://doi.org/10.1016/j.jmarsys.2017.04.002 eng eng Journal of Marine Systems 0924-7963 http://hdl.handle.net/10553/35386 doi:10.1016/j.jmarsys.2017.04.002 85019344246 000406730800003 1879-1573 39 25 174 WOS:000406730800003 A-4747-2008 Q-6714-2017 J-5330-2014 A-7663-2008 No ID Journal Of Marine Systems[ISSN 0924-7963],v. 174, p. 25-39 2510 Oceanografía Canary current Recirculation of the Canary current Intermediate poleward undercurrent Lanzarote passage info:eu-repo/semantics/article Article 2017 ftunivlaspalmas https://doi.org/10.1016/j.jmarsys.2017.04.002 2020-03-25T05:49:24Z Hydrographic measurements together with Ship mounted Acoustic Doppler Current Profilers and Lowered Acoustic Doppler Current Profilers (LADCP) obtained in October 2014 are used to describe water masses, geostrophic circulation and mass transport of the Canary Current System, as the Eastern Boundary of the North Atlantic Subtropical Gyre. Geostrophic velocities are adjusted to velocities from LADCP data to estimate an initial velocity at the reference layer. The adjustment results in a northward circulation at the thermocline layers over the African slope from an initial convergent flow. Final reference velocities and consequently absolute circulation are estimated from an inverse box model applied to an ocean divided into 13 neutral density layers. This allows us to evaluate mass fluxes consistent with the thermal wind equation and mass conservation. Ekman transport is estimated from the wind data derived from the Weather Research and Forecasting model. Ekman transport is added to the first layer and adjusted with the inverse model. The Canary Current located west of Lanzarote Island transports to the south a mass of 1.5 +/- 0.7 sv (1 sv = 10(6) m(3) s(-1) Re, 109 kg s-1) of North Atlantic Central Water at the surface and thermocline layers (similar to 0-700 m). In fall 2014, hydrographic data shows that the Canary Current in the thermocline (below at about 80 m depth to similar to 700 m) recirculates to the north over the African slope and flows through the Lanzarote Passage. At intermediate layers (similar to 700-1400 m), the Intermediate Poleward Undercurrent transports northward a relatively fresh Antarctic Intermediate Water in the range of 0.8 +/- 0.4 Sv through the Lanzarote Passage and west of Lanzarote Island beneath the recirculation of the Canary Current. Article in Journal/Newspaper Antarc* Antarctic North Atlantic Universidad de Las Palmas de Gran Canaria: Acceda Antarctic Journal of Marine Systems 174 25 39 |
institution |
Open Polar |
collection |
Universidad de Las Palmas de Gran Canaria: Acceda |
op_collection_id |
ftunivlaspalmas |
language |
English |
topic |
2510 Oceanografía Canary current Recirculation of the Canary current Intermediate poleward undercurrent Lanzarote passage |
spellingShingle |
2510 Oceanografía Canary current Recirculation of the Canary current Intermediate poleward undercurrent Lanzarote passage Hernandez-Guerra, Alonso Espino-Falcon, Elisabet Vélez Belchí,Pedro Perez Hernandez, Maria Dolores Martinez-Marrero, Antonio Cana, Luis Recirculation of the Canary current in fall 2014 |
topic_facet |
2510 Oceanografía Canary current Recirculation of the Canary current Intermediate poleward undercurrent Lanzarote passage |
description |
Hydrographic measurements together with Ship mounted Acoustic Doppler Current Profilers and Lowered Acoustic Doppler Current Profilers (LADCP) obtained in October 2014 are used to describe water masses, geostrophic circulation and mass transport of the Canary Current System, as the Eastern Boundary of the North Atlantic Subtropical Gyre. Geostrophic velocities are adjusted to velocities from LADCP data to estimate an initial velocity at the reference layer. The adjustment results in a northward circulation at the thermocline layers over the African slope from an initial convergent flow. Final reference velocities and consequently absolute circulation are estimated from an inverse box model applied to an ocean divided into 13 neutral density layers. This allows us to evaluate mass fluxes consistent with the thermal wind equation and mass conservation. Ekman transport is estimated from the wind data derived from the Weather Research and Forecasting model. Ekman transport is added to the first layer and adjusted with the inverse model. The Canary Current located west of Lanzarote Island transports to the south a mass of 1.5 +/- 0.7 sv (1 sv = 10(6) m(3) s(-1) Re, 109 kg s-1) of North Atlantic Central Water at the surface and thermocline layers (similar to 0-700 m). In fall 2014, hydrographic data shows that the Canary Current in the thermocline (below at about 80 m depth to similar to 700 m) recirculates to the north over the African slope and flows through the Lanzarote Passage. At intermediate layers (similar to 700-1400 m), the Intermediate Poleward Undercurrent transports northward a relatively fresh Antarctic Intermediate Water in the range of 0.8 +/- 0.4 Sv through the Lanzarote Passage and west of Lanzarote Island beneath the recirculation of the Canary Current. |
author2 |
Hernandez-Guerra, Alonso Martinez-Marrero, Antonio Perez-Hernandez, Maria Cana-Cascallar, Luis Velez-Belchi, Pedro 56455072400 57194228679 7801599223 57194227854 24390812600 8153672300 660191 13796944 1378362 3057975 4990325 4176723 |
format |
Article in Journal/Newspaper |
author |
Hernandez-Guerra, Alonso Espino-Falcon, Elisabet Vélez Belchí,Pedro Perez Hernandez, Maria Dolores Martinez-Marrero, Antonio Cana, Luis |
author_facet |
Hernandez-Guerra, Alonso Espino-Falcon, Elisabet Vélez Belchí,Pedro Perez Hernandez, Maria Dolores Martinez-Marrero, Antonio Cana, Luis |
author_sort |
Hernandez-Guerra, Alonso |
title |
Recirculation of the Canary current in fall 2014 |
title_short |
Recirculation of the Canary current in fall 2014 |
title_full |
Recirculation of the Canary current in fall 2014 |
title_fullStr |
Recirculation of the Canary current in fall 2014 |
title_full_unstemmed |
Recirculation of the Canary current in fall 2014 |
title_sort |
recirculation of the canary current in fall 2014 |
publishDate |
2017 |
url |
http://hdl.handle.net/10553/35386 https://doi.org/10.1016/j.jmarsys.2017.04.002 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic North Atlantic |
genre_facet |
Antarc* Antarctic North Atlantic |
op_source |
Journal Of Marine Systems[ISSN 0924-7963],v. 174, p. 25-39 |
op_relation |
Journal of Marine Systems 0924-7963 http://hdl.handle.net/10553/35386 doi:10.1016/j.jmarsys.2017.04.002 85019344246 000406730800003 1879-1573 39 25 174 WOS:000406730800003 A-4747-2008 Q-6714-2017 J-5330-2014 A-7663-2008 No ID |
op_doi |
https://doi.org/10.1016/j.jmarsys.2017.04.002 |
container_title |
Journal of Marine Systems |
container_volume |
174 |
container_start_page |
25 |
op_container_end_page |
39 |
_version_ |
1766231541531279360 |