Mean full-depth summer circulation and transports at the northern periphery of the Atlantic Ocean in the 2000s
International audience A mean state of the full-depth summer circulation in the Atlantic Ocean in the region in between Cape Farewell (Greenland), Scotland and the Greenland-Scotland Ridge (GSR) is assessed by combining 2002-2008 yearly hydrographic measurements at 59.5°N, mean dynamic topography, s...
Published in: | Journal of Geophysical Research: Oceans |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://hal.science/hal-00691375 https://doi.org/10.1029/2011JC007572 |
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ftunivbrest:oai:HAL:hal-00691375v1 2023-12-17T10:28:41+01:00 Mean full-depth summer circulation and transports at the northern periphery of the Atlantic Ocean in the 2000s Sarafanov, A. Falina, A. Mercier, H. Sokov, A. Lherminier, P. Gourcuff, C. Gladyshev, S. Gaillard, F. Daniault, Nathalie P.P. Shirshov Institute of Oceanology (SIO) Russian Academy of Sciences Moscow (RAS) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) 2012 https://hal.science/hal-00691375 https://doi.org/10.1029/2011JC007572 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1029/2011JC007572 hal-00691375 https://hal.science/hal-00691375 doi:10.1029/2011JC007572 ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-00691375 Journal of Geophysical Research. Oceans, 2012, 117, pp.C01014. ⟨10.1029/2011JC007572⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2012 ftunivbrest https://doi.org/10.1029/2011JC007572 2023-11-21T23:36:28Z International audience A mean state of the full-depth summer circulation in the Atlantic Ocean in the region in between Cape Farewell (Greenland), Scotland and the Greenland-Scotland Ridge (GSR) is assessed by combining 2002-2008 yearly hydrographic measurements at 59.5°N, mean dynamic topography, satellite altimetry data and available estimates of the Atlantic-Nordic Seas exchange. The mean absolute transports by the upper-ocean, mid-depth and deep currents and the Meridional Overturning Circulation (MOCσ = 16.5 ± 2.2 Sv, at σ0 = 27.55) at 59.5°N are quantified in the density space. Inter-basin and diapycnal volume fluxes in between the 59.5°N section and the GSR are then estimated from a box model. The dominant components of the meridional exchange across 59.5°N are the North Atlantic Current (NAC, 15.5 ± 0.8 Sv, σ0 < 27.55) east of the Reykjanes Ridge, the northward Irminger Current (IC, 12.0 ± 3.0 Sv) and southward Western Boundary Current (WBC, 32.1 ± 5.9 Sv) in the Irminger Sea and the deep water export from the northern Iceland Basin (3.7 ± 0.8 Sv, σ0 > 27.80). About 60% (12.7 ± 1.4 Sv) of waters carried in the MOCσ upper limb (σ0 < 27.55) by the NAC/IC across 59.5°N (21.1 ± 1.0 Sv) recirculates westward south of the GSR and feeds the WBC. 80% (10.2 ± 1.7 Sv) of the recirculating NAC/IC-derived upper-ocean waters gains density of σ0 > 27.55 and contributes to the MOCσ lower limb. Accordingly, the contribution of light-to-dense water conversion south of the GSR (∼10 Sv) to the MOCσ lower limb at 59.5°N is one and a half times larger than the contribution of dense water production in the Nordic Seas (∼6 Sv). Article in Journal/Newspaper Cape Farewell Greenland Greenland-Scotland Ridge Iceland Nordic Seas north atlantic current North Atlantic Université de Bretagne Occidentale: HAL Greenland Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) Journal of Geophysical Research: Oceans 117 C1 |
institution |
Open Polar |
collection |
Université de Bretagne Occidentale: HAL |
op_collection_id |
ftunivbrest |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Sarafanov, A. Falina, A. Mercier, H. Sokov, A. Lherminier, P. Gourcuff, C. Gladyshev, S. Gaillard, F. Daniault, Nathalie Mean full-depth summer circulation and transports at the northern periphery of the Atlantic Ocean in the 2000s |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience A mean state of the full-depth summer circulation in the Atlantic Ocean in the region in between Cape Farewell (Greenland), Scotland and the Greenland-Scotland Ridge (GSR) is assessed by combining 2002-2008 yearly hydrographic measurements at 59.5°N, mean dynamic topography, satellite altimetry data and available estimates of the Atlantic-Nordic Seas exchange. The mean absolute transports by the upper-ocean, mid-depth and deep currents and the Meridional Overturning Circulation (MOCσ = 16.5 ± 2.2 Sv, at σ0 = 27.55) at 59.5°N are quantified in the density space. Inter-basin and diapycnal volume fluxes in between the 59.5°N section and the GSR are then estimated from a box model. The dominant components of the meridional exchange across 59.5°N are the North Atlantic Current (NAC, 15.5 ± 0.8 Sv, σ0 < 27.55) east of the Reykjanes Ridge, the northward Irminger Current (IC, 12.0 ± 3.0 Sv) and southward Western Boundary Current (WBC, 32.1 ± 5.9 Sv) in the Irminger Sea and the deep water export from the northern Iceland Basin (3.7 ± 0.8 Sv, σ0 > 27.80). About 60% (12.7 ± 1.4 Sv) of waters carried in the MOCσ upper limb (σ0 < 27.55) by the NAC/IC across 59.5°N (21.1 ± 1.0 Sv) recirculates westward south of the GSR and feeds the WBC. 80% (10.2 ± 1.7 Sv) of the recirculating NAC/IC-derived upper-ocean waters gains density of σ0 > 27.55 and contributes to the MOCσ lower limb. Accordingly, the contribution of light-to-dense water conversion south of the GSR (∼10 Sv) to the MOCσ lower limb at 59.5°N is one and a half times larger than the contribution of dense water production in the Nordic Seas (∼6 Sv). |
author2 |
P.P. Shirshov Institute of Oceanology (SIO) Russian Academy of Sciences Moscow (RAS) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Sarafanov, A. Falina, A. Mercier, H. Sokov, A. Lherminier, P. Gourcuff, C. Gladyshev, S. Gaillard, F. Daniault, Nathalie |
author_facet |
Sarafanov, A. Falina, A. Mercier, H. Sokov, A. Lherminier, P. Gourcuff, C. Gladyshev, S. Gaillard, F. Daniault, Nathalie |
author_sort |
Sarafanov, A. |
title |
Mean full-depth summer circulation and transports at the northern periphery of the Atlantic Ocean in the 2000s |
title_short |
Mean full-depth summer circulation and transports at the northern periphery of the Atlantic Ocean in the 2000s |
title_full |
Mean full-depth summer circulation and transports at the northern periphery of the Atlantic Ocean in the 2000s |
title_fullStr |
Mean full-depth summer circulation and transports at the northern periphery of the Atlantic Ocean in the 2000s |
title_full_unstemmed |
Mean full-depth summer circulation and transports at the northern periphery of the Atlantic Ocean in the 2000s |
title_sort |
mean full-depth summer circulation and transports at the northern periphery of the atlantic ocean in the 2000s |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.science/hal-00691375 https://doi.org/10.1029/2011JC007572 |
long_lat |
ENVELOPE(-22.250,-22.250,65.467,65.467) ENVELOPE(-34.041,-34.041,63.054,63.054) |
geographic |
Greenland Reykjanes Irminger Sea |
geographic_facet |
Greenland Reykjanes Irminger Sea |
genre |
Cape Farewell Greenland Greenland-Scotland Ridge Iceland Nordic Seas north atlantic current North Atlantic |
genre_facet |
Cape Farewell Greenland Greenland-Scotland Ridge Iceland Nordic Seas north atlantic current North Atlantic |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-00691375 Journal of Geophysical Research. Oceans, 2012, 117, pp.C01014. ⟨10.1029/2011JC007572⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2011JC007572 hal-00691375 https://hal.science/hal-00691375 doi:10.1029/2011JC007572 |
op_doi |
https://doi.org/10.1029/2011JC007572 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
117 |
container_issue |
C1 |
_version_ |
1785580861000777728 |