Upper ocean variability between Iceland and Newfoundland, 1993-1998
International audience We investigate the variability of upper ocean temperature and surface salinity between Iceland and Newfoundland along World Ocean Circulation Experiment line AX2 in 1993-1998. North of 54°N, as well as close to Newfoundland, deviations from the seasonal cycle indicate upper oc...
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-00772190 https://hal.science/hal-00772190/document https://hal.science/hal-00772190/file/98JC02713.pdf https://doi.org/10.1029/1999JC900182 |
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ftsorbonneuniv:oai:HAL:hal-00772190v1 2023-12-17T10:32:07+01:00 Upper ocean variability between Iceland and Newfoundland, 1993-1998 Reverdin, Gilles Verbrugge, Nathalie Valdimarsson, Hedinn Laboratoire d'océanographie dynamique et de climatologie (LODYC) Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) 1999 https://hal.science/hal-00772190 https://hal.science/hal-00772190/document https://hal.science/hal-00772190/file/98JC02713.pdf https://doi.org/10.1029/1999JC900182 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/1999JC900182 hal-00772190 https://hal.science/hal-00772190 https://hal.science/hal-00772190/document https://hal.science/hal-00772190/file/98JC02713.pdf BIBCODE: 1999JGR.10429599R doi:10.1029/1999JC900182 info:eu-repo/semantics/OpenAccess ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.science/hal-00772190 Journal of Geophysical Research, 1999, 104, pp.29599-29612. ⟨10.1029/1999JC900182⟩ Oceanography: Physical: Sea level variations Oceanography: Physical: Hydrography Oceanography: General: Climate and interannual variability Meteorology and Atmospheric Dynamics: Ocean/atmosphere interactions [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 1999 ftsorbonneuniv https://doi.org/10.1029/1999JC900182 2023-11-21T23:48:03Z International audience We investigate the variability of upper ocean temperature and surface salinity between Iceland and Newfoundland along World Ocean Circulation Experiment line AX2 in 1993-1998. North of 54°N, as well as close to Newfoundland, deviations from the seasonal cycle indicate upper ocean warming from 1994 to 1998, with largest anomalous warming during late 1995/early 1996 and during the winter 1997/1998. North of 54°N, surface salinity increases after mid-1996. The winter of 1995/1996 is the first winter of weak westerlies after more than 20 years of strong westerly conditions in the subarctic gyre, and the ocean loses less heat during that winter than during a normal year. The magnitude of upper ocean heat content change is at least twice as large as what results from the change in air-sea fluxes, which indicates a complementary contribution to heat content change by advection. Altimetric sea level data indicate also an increase of sea level of the order of 6.5 cm during that year, out of which more than 4 cm is contributed by the steric change associated with the temperature increase. A principal component analysis of the sea level data suggests that the increase sensed along line AX2 west of the Reykjanes ridge is found in most of the subpolar gyre, although to a lesser extent in most other areas. Article in Journal/Newspaper Iceland Newfoundland Subarctic HAL Sorbonne Université Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) Journal of Geophysical Research: Oceans 104 C12 29599 29611 |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
Oceanography: Physical: Sea level variations Oceanography: Physical: Hydrography Oceanography: General: Climate and interannual variability Meteorology and Atmospheric Dynamics: Ocean/atmosphere interactions [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
spellingShingle |
Oceanography: Physical: Sea level variations Oceanography: Physical: Hydrography Oceanography: General: Climate and interannual variability Meteorology and Atmospheric Dynamics: Ocean/atmosphere interactions [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Reverdin, Gilles Verbrugge, Nathalie Valdimarsson, Hedinn Upper ocean variability between Iceland and Newfoundland, 1993-1998 |
topic_facet |
Oceanography: Physical: Sea level variations Oceanography: Physical: Hydrography Oceanography: General: Climate and interannual variability Meteorology and Atmospheric Dynamics: Ocean/atmosphere interactions [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
description |
International audience We investigate the variability of upper ocean temperature and surface salinity between Iceland and Newfoundland along World Ocean Circulation Experiment line AX2 in 1993-1998. North of 54°N, as well as close to Newfoundland, deviations from the seasonal cycle indicate upper ocean warming from 1994 to 1998, with largest anomalous warming during late 1995/early 1996 and during the winter 1997/1998. North of 54°N, surface salinity increases after mid-1996. The winter of 1995/1996 is the first winter of weak westerlies after more than 20 years of strong westerly conditions in the subarctic gyre, and the ocean loses less heat during that winter than during a normal year. The magnitude of upper ocean heat content change is at least twice as large as what results from the change in air-sea fluxes, which indicates a complementary contribution to heat content change by advection. Altimetric sea level data indicate also an increase of sea level of the order of 6.5 cm during that year, out of which more than 4 cm is contributed by the steric change associated with the temperature increase. A principal component analysis of the sea level data suggests that the increase sensed along line AX2 west of the Reykjanes ridge is found in most of the subpolar gyre, although to a lesser extent in most other areas. |
author2 |
Laboratoire d'océanographie dynamique et de climatologie (LODYC) Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Reverdin, Gilles Verbrugge, Nathalie Valdimarsson, Hedinn |
author_facet |
Reverdin, Gilles Verbrugge, Nathalie Valdimarsson, Hedinn |
author_sort |
Reverdin, Gilles |
title |
Upper ocean variability between Iceland and Newfoundland, 1993-1998 |
title_short |
Upper ocean variability between Iceland and Newfoundland, 1993-1998 |
title_full |
Upper ocean variability between Iceland and Newfoundland, 1993-1998 |
title_fullStr |
Upper ocean variability between Iceland and Newfoundland, 1993-1998 |
title_full_unstemmed |
Upper ocean variability between Iceland and Newfoundland, 1993-1998 |
title_sort |
upper ocean variability between iceland and newfoundland, 1993-1998 |
publisher |
HAL CCSD |
publishDate |
1999 |
url |
https://hal.science/hal-00772190 https://hal.science/hal-00772190/document https://hal.science/hal-00772190/file/98JC02713.pdf https://doi.org/10.1029/1999JC900182 |
long_lat |
ENVELOPE(-22.250,-22.250,65.467,65.467) |
geographic |
Reykjanes |
geographic_facet |
Reykjanes |
genre |
Iceland Newfoundland Subarctic |
genre_facet |
Iceland Newfoundland Subarctic |
op_source |
ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.science/hal-00772190 Journal of Geophysical Research, 1999, 104, pp.29599-29612. ⟨10.1029/1999JC900182⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/1999JC900182 hal-00772190 https://hal.science/hal-00772190 https://hal.science/hal-00772190/document https://hal.science/hal-00772190/file/98JC02713.pdf BIBCODE: 1999JGR.10429599R doi:10.1029/1999JC900182 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/1999JC900182 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
104 |
container_issue |
C12 |
container_start_page |
29599 |
op_container_end_page |
29611 |
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1785585626035257344 |