Seasonal sea surface height variability in the North Atlantic Ocean
International audience We investigate the seasonal sea surface height (SSH) variability on large spatial scales in the North Atlantic by using both a numerical simulation and in situ data. First, an ocean general circulation model is run with daily forcing from the European Center for Medium-Range W...
Published in: | Journal of Geophysical Research: Oceans |
---|---|
Main Authors: | , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2000
|
Subjects: | |
Online Access: | https://hal.science/hal-00772163 https://hal.science/hal-00772163/document https://hal.science/hal-00772163/file/jgrc7984.pdf https://doi.org/10.1029/1999JC900296 |
id |
ftinsu:oai:HAL:hal-00772163v1 |
---|---|
record_format |
openpolar |
spelling |
ftinsu:oai:HAL:hal-00772163v1 2023-12-17T10:46:22+01:00 Seasonal sea surface height variability in the North Atlantic Ocean Ferry, Nicolas Reverdin, Gilles Oschlies, Andreas Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) Helmholtz Centre for Ocean Research Kiel (GEOMAR) 2000-03 https://hal.science/hal-00772163 https://hal.science/hal-00772163/document https://hal.science/hal-00772163/file/jgrc7984.pdf https://doi.org/10.1029/1999JC900296 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/1999JC900296 hal-00772163 https://hal.science/hal-00772163 https://hal.science/hal-00772163/document https://hal.science/hal-00772163/file/jgrc7984.pdf BIBCODE: 2000JGR.105.6307F doi:10.1029/1999JC900296 info:eu-repo/semantics/OpenAccess ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.science/hal-00772163 Journal of Geophysical Research, 2000, 105, pp.6307-6326. ⟨10.1029/1999JC900296⟩ Oceanography: General: Diurnal seasonal and annual cycles Oceanography: Physical: Air/sea interactions Oceanography: Physical: Sea level variations Oceanography: Physical: Upper ocean processes [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 2000 ftinsu https://doi.org/10.1029/1999JC900296 2023-11-22T17:38:16Z International audience We investigate the seasonal sea surface height (SSH) variability on large spatial scales in the North Atlantic by using both a numerical simulation and in situ data. First, an ocean general circulation model is run with daily forcing from the European Center for Medium-Range Weather Forecasts reanalysis. We evaluate the different contributions to the seasonal SSH variability resulting from the surface heat fluxes, advection, salt content variability, deep ocean steric changes, and bottom pressure variability. These terms are compared with estimates from in situ data. North of 20°N, there is an approximate balance between hQ, the air-sea heat flux induced changes in steric height, and SSH variability. The next important component is the advection (its contribution to the annual amplitude is of the order of 1 cm except near the western boundary); other contributions are found to be smaller. Between 10°N and 10°S the advection variability induced by the seasonal wind stress cycle is the primary source of SSH variability. We then compare the sea surface height annual harmonic from TOPEX/Poseidon altimetry with the steric effect from the heat flux and with model and/or in situ estimates of the other terms. In many areas north of 20°N the balance between hQ and the altimetric SSH seasonal cycle is closed within the uncertainty limit of each of the terms of the SSH budget. However, hQ and the SSH do not balance each other in the eastern North Atlantic, and the results are sensitive to the choice of the heat flux product, suggesting that significant errors, typically 20-40 W m -2 for the seasonal cycle amplitude, are present in the meteorological model heat fluxes. Article in Journal/Newspaper North Atlantic Institut national des sciences de l'Univers: HAL-INSU Journal of Geophysical Research: Oceans 105 C3 6307 6326 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Oceanography: General: Diurnal seasonal and annual cycles Oceanography: Physical: Air/sea interactions Oceanography: Physical: Sea level variations Oceanography: Physical: Upper ocean processes [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: General: Diurnal seasonal and annual cycles Oceanography: Physical: Air/sea interactions Oceanography: Physical: Sea level variations Oceanography: Physical: Upper ocean processes [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] Ferry, Nicolas Reverdin, Gilles Oschlies, Andreas Seasonal sea surface height variability in the North Atlantic Ocean |
topic_facet |
Oceanography: General: Diurnal seasonal and annual cycles Oceanography: Physical: Air/sea interactions Oceanography: Physical: Sea level variations Oceanography: Physical: Upper ocean processes [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 seasonal sea surface height (SSH) variability on large spatial scales in the North Atlantic by using both a numerical simulation and in situ data. First, an ocean general circulation model is run with daily forcing from the European Center for Medium-Range Weather Forecasts reanalysis. We evaluate the different contributions to the seasonal SSH variability resulting from the surface heat fluxes, advection, salt content variability, deep ocean steric changes, and bottom pressure variability. These terms are compared with estimates from in situ data. North of 20°N, there is an approximate balance between hQ, the air-sea heat flux induced changes in steric height, and SSH variability. The next important component is the advection (its contribution to the annual amplitude is of the order of 1 cm except near the western boundary); other contributions are found to be smaller. Between 10°N and 10°S the advection variability induced by the seasonal wind stress cycle is the primary source of SSH variability. We then compare the sea surface height annual harmonic from TOPEX/Poseidon altimetry with the steric effect from the heat flux and with model and/or in situ estimates of the other terms. In many areas north of 20°N the balance between hQ and the altimetric SSH seasonal cycle is closed within the uncertainty limit of each of the terms of the SSH budget. However, hQ and the SSH do not balance each other in the eastern North Atlantic, and the results are sensitive to the choice of the heat flux product, suggesting that significant errors, typically 20-40 W m -2 for the seasonal cycle amplitude, are present in the meteorological model heat fluxes. |
author2 |
Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) Helmholtz Centre for Ocean Research Kiel (GEOMAR) |
format |
Article in Journal/Newspaper |
author |
Ferry, Nicolas Reverdin, Gilles Oschlies, Andreas |
author_facet |
Ferry, Nicolas Reverdin, Gilles Oschlies, Andreas |
author_sort |
Ferry, Nicolas |
title |
Seasonal sea surface height variability in the North Atlantic Ocean |
title_short |
Seasonal sea surface height variability in the North Atlantic Ocean |
title_full |
Seasonal sea surface height variability in the North Atlantic Ocean |
title_fullStr |
Seasonal sea surface height variability in the North Atlantic Ocean |
title_full_unstemmed |
Seasonal sea surface height variability in the North Atlantic Ocean |
title_sort |
seasonal sea surface height variability in the north atlantic ocean |
publisher |
HAL CCSD |
publishDate |
2000 |
url |
https://hal.science/hal-00772163 https://hal.science/hal-00772163/document https://hal.science/hal-00772163/file/jgrc7984.pdf https://doi.org/10.1029/1999JC900296 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.science/hal-00772163 Journal of Geophysical Research, 2000, 105, pp.6307-6326. ⟨10.1029/1999JC900296⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/1999JC900296 hal-00772163 https://hal.science/hal-00772163 https://hal.science/hal-00772163/document https://hal.science/hal-00772163/file/jgrc7984.pdf BIBCODE: 2000JGR.105.6307F doi:10.1029/1999JC900296 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/1999JC900296 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
105 |
container_issue |
C3 |
container_start_page |
6307 |
op_container_end_page |
6326 |
_version_ |
1785569808581918720 |