Internal and forced variability along a section between Greenland and Portugal in the CLIPPER Atlantic model
Numerical models are used to estimate the meridional overturning and transports along the paths of two hydrographic cruises, carried out in 1997 and 2002 from Greenland to Portugal. We have examined the influence of the different paths of the two cruises and found that it could explain 0.4 to 2 Sv o...
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ftsouthampton:oai:eprints.soton.ac.uk:64364 2023-07-30T04:03:14+02:00 Internal and forced variability along a section between Greenland and Portugal in the CLIPPER Atlantic model Treguier, Anne Marie Gourcuff, Claire Lherminier, Pascale Mercier, Herle Barnier, Bernard Madec, Gurvan Molines, Jean-Marc Penduff, Thierry Czeschel, Lars Boning, Claus 2006-12 https://eprints.soton.ac.uk/64364/ http://www.springerlink.com/content/72072w1522234805/?p=34735c24bc7d4584a18d8af62971e424&pi=7 unknown Treguier, Anne Marie, Gourcuff, Claire, Lherminier, Pascale, Mercier, Herle, Barnier, Bernard, Madec, Gurvan, Molines, Jean-Marc, Penduff, Thierry, Czeschel, Lars and Boning, Claus (2006) Internal and forced variability along a section between Greenland and Portugal in the CLIPPER Atlantic model. Ocean Dynamics, 56 (5-6), 568-580. (doi:10.1007/s10236-006-0069-y <http://dx.doi.org/10.1007/s10236-006-0069-y>). Article PeerReviewed 2006 ftsouthampton https://doi.org/10.1007/s10236-006-0069-y 2023-07-09T21:04:03Z Numerical models are used to estimate the meridional overturning and transports along the paths of two hydrographic cruises, carried out in 1997 and 2002 from Greenland to Portugal. We have examined the influence of the different paths of the two cruises and found that it could explain 0.4 to 2 Sv of difference in overturning (the precise value is model-dependent). Models show a decrease in the overturning circulation between 1997 and 2002, with different amplitudes. The CLIPPER ATL6 model reproduces well the observed weakening of the overturning in density coordinates between the cruises; in the model, the change is due to the combination of interannual and high-frequency forcing and internal variability associated with eddies and meanders. Examination of the -coordinate overturning reveals model–data discrepancies: the vertical structure in the models does not change as much as the observed one. The East Greenland current variability is mainly wind-forced in the ATL6 model, while fluctuations due to eddies and instabilities explain a large part of the North Atlantic Current variability. The time-residual transport of dense water and heat due to eddy correlations between currents and properties is small across this section, which is normal to the direction of the main current. Article in Journal/Newspaper East Greenland east greenland current Greenland north atlantic current North Atlantic University of Southampton: e-Prints Soton Greenland Ocean Dynamics 56 5-6 568 580 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
unknown |
description |
Numerical models are used to estimate the meridional overturning and transports along the paths of two hydrographic cruises, carried out in 1997 and 2002 from Greenland to Portugal. We have examined the influence of the different paths of the two cruises and found that it could explain 0.4 to 2 Sv of difference in overturning (the precise value is model-dependent). Models show a decrease in the overturning circulation between 1997 and 2002, with different amplitudes. The CLIPPER ATL6 model reproduces well the observed weakening of the overturning in density coordinates between the cruises; in the model, the change is due to the combination of interannual and high-frequency forcing and internal variability associated with eddies and meanders. Examination of the -coordinate overturning reveals model–data discrepancies: the vertical structure in the models does not change as much as the observed one. The East Greenland current variability is mainly wind-forced in the ATL6 model, while fluctuations due to eddies and instabilities explain a large part of the North Atlantic Current variability. The time-residual transport of dense water and heat due to eddy correlations between currents and properties is small across this section, which is normal to the direction of the main current. |
format |
Article in Journal/Newspaper |
author |
Treguier, Anne Marie Gourcuff, Claire Lherminier, Pascale Mercier, Herle Barnier, Bernard Madec, Gurvan Molines, Jean-Marc Penduff, Thierry Czeschel, Lars Boning, Claus |
spellingShingle |
Treguier, Anne Marie Gourcuff, Claire Lherminier, Pascale Mercier, Herle Barnier, Bernard Madec, Gurvan Molines, Jean-Marc Penduff, Thierry Czeschel, Lars Boning, Claus Internal and forced variability along a section between Greenland and Portugal in the CLIPPER Atlantic model |
author_facet |
Treguier, Anne Marie Gourcuff, Claire Lherminier, Pascale Mercier, Herle Barnier, Bernard Madec, Gurvan Molines, Jean-Marc Penduff, Thierry Czeschel, Lars Boning, Claus |
author_sort |
Treguier, Anne Marie |
title |
Internal and forced variability along a section between Greenland and Portugal in the CLIPPER Atlantic model |
title_short |
Internal and forced variability along a section between Greenland and Portugal in the CLIPPER Atlantic model |
title_full |
Internal and forced variability along a section between Greenland and Portugal in the CLIPPER Atlantic model |
title_fullStr |
Internal and forced variability along a section between Greenland and Portugal in the CLIPPER Atlantic model |
title_full_unstemmed |
Internal and forced variability along a section between Greenland and Portugal in the CLIPPER Atlantic model |
title_sort |
internal and forced variability along a section between greenland and portugal in the clipper atlantic model |
publishDate |
2006 |
url |
https://eprints.soton.ac.uk/64364/ http://www.springerlink.com/content/72072w1522234805/?p=34735c24bc7d4584a18d8af62971e424&pi=7 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
East Greenland east greenland current Greenland north atlantic current North Atlantic |
genre_facet |
East Greenland east greenland current Greenland north atlantic current North Atlantic |
op_relation |
Treguier, Anne Marie, Gourcuff, Claire, Lherminier, Pascale, Mercier, Herle, Barnier, Bernard, Madec, Gurvan, Molines, Jean-Marc, Penduff, Thierry, Czeschel, Lars and Boning, Claus (2006) Internal and forced variability along a section between Greenland and Portugal in the CLIPPER Atlantic model. Ocean Dynamics, 56 (5-6), 568-580. (doi:10.1007/s10236-006-0069-y <http://dx.doi.org/10.1007/s10236-006-0069-y>). |
op_doi |
https://doi.org/10.1007/s10236-006-0069-y |
container_title |
Ocean Dynamics |
container_volume |
56 |
container_issue |
5-6 |
container_start_page |
568 |
op_container_end_page |
580 |
_version_ |
1772814196561412096 |