The 1992-2009 transport variability of the East Greenland‐Irminger Current at 60°N
International audience The East Greenland Irminger Current (EGIC) decadal transport variability likely influences deep convection intensity in the Labrador and Irminger Seas but is poorly known yet. The EGIC transport west of the 2000 m isobath was estimated, for the first time, between 1992 and 200...
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ftccsdartic:oai:HAL:hal-00581655v1 2023-05-15T16:03:39+02:00 The 1992-2009 transport variability of the East Greenland‐Irminger Current at 60°N Daniault, Nathalie Mercier, H. Lherminier, P. 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) 2011 https://hal.archives-ouvertes.fr/hal-00581655 https://doi.org/10.1029/2011GL046863 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2011GL046863 hal-00581655 https://hal.archives-ouvertes.fr/hal-00581655 doi:10.1029/2011GL046863 ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.archives-ouvertes.fr/hal-00581655 Geophysical Research Letters, American Geophysical Union, 2011, 38, pp.L07601. ⟨10.1029/2011GL046863⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2011 ftccsdartic https://doi.org/10.1029/2011GL046863 2021-10-17T01:54:22Z International audience The East Greenland Irminger Current (EGIC) decadal transport variability likely influences deep convection intensity in the Labrador and Irminger Seas but is poorly known yet. The EGIC transport west of the 2000 m isobath was estimated, for the first time, between 1992 and 2009 by combining surface geostrophic velocities derived from altimetry with an estimate of the vertical structure of the transport variability statistically determined from a moored array deployed in 2004-2006. The reconstructed 17‐year time series of the EGIC transport was then validated against independent estimates confirming that, indeed, the vertical distribution of the EGIC variability has not changed significantly over the last two decades. The 1992-2009 mean transport is 19.5 Sv with a standard error of 0.3 Sv (1 Sv = 106 m3 s−1). In 1992-1996, the EGIC transport was close to the average. Over the following decade (1997-2005), the EGIC transport declined by 3 Sv (15%) so that the 2004-2006 mean transport inferred from the moored array is 2.2 Sv (10%) less than the 1992-2009 mean. It was followed by a period of higher transport. The seasonal to interannual transport variability is coherent with the variability of the windstress curl at the center of the Irminger Sea. Article in Journal/Newspaper East Greenland Greenland Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Greenland Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) Curl ENVELOPE(-63.071,-63.071,-70.797,-70.797) Geophysical Research Letters 38 7 n/a n/a |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
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 Daniault, Nathalie Mercier, H. Lherminier, P. The 1992-2009 transport variability of the East Greenland‐Irminger Current at 60°N |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience The East Greenland Irminger Current (EGIC) decadal transport variability likely influences deep convection intensity in the Labrador and Irminger Seas but is poorly known yet. The EGIC transport west of the 2000 m isobath was estimated, for the first time, between 1992 and 2009 by combining surface geostrophic velocities derived from altimetry with an estimate of the vertical structure of the transport variability statistically determined from a moored array deployed in 2004-2006. The reconstructed 17‐year time series of the EGIC transport was then validated against independent estimates confirming that, indeed, the vertical distribution of the EGIC variability has not changed significantly over the last two decades. The 1992-2009 mean transport is 19.5 Sv with a standard error of 0.3 Sv (1 Sv = 106 m3 s−1). In 1992-1996, the EGIC transport was close to the average. Over the following decade (1997-2005), the EGIC transport declined by 3 Sv (15%) so that the 2004-2006 mean transport inferred from the moored array is 2.2 Sv (10%) less than the 1992-2009 mean. It was followed by a period of higher transport. The seasonal to interannual transport variability is coherent with the variability of the windstress curl at the center of the Irminger Sea. |
author2 |
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 |
Daniault, Nathalie Mercier, H. Lherminier, P. |
author_facet |
Daniault, Nathalie Mercier, H. Lherminier, P. |
author_sort |
Daniault, Nathalie |
title |
The 1992-2009 transport variability of the East Greenland‐Irminger Current at 60°N |
title_short |
The 1992-2009 transport variability of the East Greenland‐Irminger Current at 60°N |
title_full |
The 1992-2009 transport variability of the East Greenland‐Irminger Current at 60°N |
title_fullStr |
The 1992-2009 transport variability of the East Greenland‐Irminger Current at 60°N |
title_full_unstemmed |
The 1992-2009 transport variability of the East Greenland‐Irminger Current at 60°N |
title_sort |
1992-2009 transport variability of the east greenland‐irminger current at 60°n |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://hal.archives-ouvertes.fr/hal-00581655 https://doi.org/10.1029/2011GL046863 |
long_lat |
ENVELOPE(-34.041,-34.041,63.054,63.054) ENVELOPE(-63.071,-63.071,-70.797,-70.797) |
geographic |
Greenland Irminger Sea Curl |
geographic_facet |
Greenland Irminger Sea Curl |
genre |
East Greenland Greenland |
genre_facet |
East Greenland Greenland |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.archives-ouvertes.fr/hal-00581655 Geophysical Research Letters, American Geophysical Union, 2011, 38, pp.L07601. ⟨10.1029/2011GL046863⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2011GL046863 hal-00581655 https://hal.archives-ouvertes.fr/hal-00581655 doi:10.1029/2011GL046863 |
op_doi |
https://doi.org/10.1029/2011GL046863 |
container_title |
Geophysical Research Letters |
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38 |
container_issue |
7 |
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n/a |
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1766399353304383488 |