Variability of the ocean heat content during the last millennium – an assessment with the ECHO-g Model
International audience Studies addressing climate variability during the last millennium generally focus on variables with a direct influence on climate variability, like the fast thermal response to varying radiative forcing, or the large-scale changes in atmospheric dynamics (e.g. North Atlantic O...
Published in: | Climate of the Past |
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Online Access: | https://hal.archives-ouvertes.fr/hal-03209347 https://hal.archives-ouvertes.fr/hal-03209347/document https://hal.archives-ouvertes.fr/hal-03209347/file/cp-9-547-2013.pdf https://doi.org/10.5194/cp-9-547-2013 |
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ftccsdartic:oai:HAL:hal-03209347v1 2023-05-15T17:32:04+02:00 Variability of the ocean heat content during the last millennium – an assessment with the ECHO-g Model Ortega, P. Montoya, M. González-Rouco, F. Beltrami, H. Swingedouw, D. Universidad Complutense de Madrid = Complutense University of Madrid Madrid (UCM) St. Francis Xavier University (StFX) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) 2013 https://hal.archives-ouvertes.fr/hal-03209347 https://hal.archives-ouvertes.fr/hal-03209347/document https://hal.archives-ouvertes.fr/hal-03209347/file/cp-9-547-2013.pdf https://doi.org/10.5194/cp-9-547-2013 en eng HAL CCSD European Geosciences Union (EGU) info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-9-547-2013 hal-03209347 https://hal.archives-ouvertes.fr/hal-03209347 https://hal.archives-ouvertes.fr/hal-03209347/document https://hal.archives-ouvertes.fr/hal-03209347/file/cp-9-547-2013.pdf doi:10.5194/cp-9-547-2013 info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.archives-ouvertes.fr/hal-03209347 Climate of the Past, European Geosciences Union (EGU), 2013, 9 (2), pp.547-565. ⟨10.5194/cp-9-547-2013⟩ [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2013 ftccsdartic https://doi.org/10.5194/cp-9-547-2013 2021-12-19T00:14:21Z International audience Studies addressing climate variability during the last millennium generally focus on variables with a direct influence on climate variability, like the fast thermal response to varying radiative forcing, or the large-scale changes in atmospheric dynamics (e.g. North Atlantic Oscillation). The ocean responds to these variations by slowly integrating in depth the upper heat flux changes, thus producing a delayed influence on ocean heat content (OHC) that can later impact low frequency SST (sea surface temperature) variability through reemergence processes. In this study, both the externally and internally driven variations of the OHC during the last millennium are investigated using a set of fully coupled simulations with the ECHO-G (coupled climate model ECHAMA4 and ocean model HOPE-G) atmosphere–ocean general circulation model (AOGCM). When compared to observations for the last 55 yr, the model tends to overestimate the global trends and underestimate the decadal OHC variability. Extending the analysis back to the last one thousand years, the main impact of the radiative forcing is an OHC increase at high latitudes, explained to some extent by a reduction in cloud cover and the subsequent increase of short-wave radiation at the surface. This OHC response is dominated by the effect of volcanism in the preindustrial era, and by the fast increase of GHGs during the last 150 yr. Likewise, salient impacts from internal climate variability are observed at regional scales. For instance, upper temperature in the equatorial Pacific is controlled by ENSO (El Niño Southern Oscillation) variability from interannual to multidecadal timescales. Also, both the Pacific Decadal Oscillation (PDO) and the Atlantic Multidecadal Oscillation (AMO) modulate intermittently the interdecadal OHC variability in the North Pacific and Mid Atlantic, respectively. The NAO, through its influence on North Atlantic surface heat fluxes and convection, also plays an important role on the OHC at multiple timescales, leading ... Article in Journal/Newspaper North Atlantic North Atlantic oscillation Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Pacific Climate of the Past 9 2 547 565 |
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.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Ortega, P. Montoya, M. González-Rouco, F. Beltrami, H. Swingedouw, D. Variability of the ocean heat content during the last millennium – an assessment with the ECHO-g Model |
topic_facet |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Studies addressing climate variability during the last millennium generally focus on variables with a direct influence on climate variability, like the fast thermal response to varying radiative forcing, or the large-scale changes in atmospheric dynamics (e.g. North Atlantic Oscillation). The ocean responds to these variations by slowly integrating in depth the upper heat flux changes, thus producing a delayed influence on ocean heat content (OHC) that can later impact low frequency SST (sea surface temperature) variability through reemergence processes. In this study, both the externally and internally driven variations of the OHC during the last millennium are investigated using a set of fully coupled simulations with the ECHO-G (coupled climate model ECHAMA4 and ocean model HOPE-G) atmosphere–ocean general circulation model (AOGCM). When compared to observations for the last 55 yr, the model tends to overestimate the global trends and underestimate the decadal OHC variability. Extending the analysis back to the last one thousand years, the main impact of the radiative forcing is an OHC increase at high latitudes, explained to some extent by a reduction in cloud cover and the subsequent increase of short-wave radiation at the surface. This OHC response is dominated by the effect of volcanism in the preindustrial era, and by the fast increase of GHGs during the last 150 yr. Likewise, salient impacts from internal climate variability are observed at regional scales. For instance, upper temperature in the equatorial Pacific is controlled by ENSO (El Niño Southern Oscillation) variability from interannual to multidecadal timescales. Also, both the Pacific Decadal Oscillation (PDO) and the Atlantic Multidecadal Oscillation (AMO) modulate intermittently the interdecadal OHC variability in the North Pacific and Mid Atlantic, respectively. The NAO, through its influence on North Atlantic surface heat fluxes and convection, also plays an important role on the OHC at multiple timescales, leading ... |
author2 |
Universidad Complutense de Madrid = Complutense University of Madrid Madrid (UCM) St. Francis Xavier University (StFX) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) |
format |
Article in Journal/Newspaper |
author |
Ortega, P. Montoya, M. González-Rouco, F. Beltrami, H. Swingedouw, D. |
author_facet |
Ortega, P. Montoya, M. González-Rouco, F. Beltrami, H. Swingedouw, D. |
author_sort |
Ortega, P. |
title |
Variability of the ocean heat content during the last millennium – an assessment with the ECHO-g Model |
title_short |
Variability of the ocean heat content during the last millennium – an assessment with the ECHO-g Model |
title_full |
Variability of the ocean heat content during the last millennium – an assessment with the ECHO-g Model |
title_fullStr |
Variability of the ocean heat content during the last millennium – an assessment with the ECHO-g Model |
title_full_unstemmed |
Variability of the ocean heat content during the last millennium – an assessment with the ECHO-g Model |
title_sort |
variability of the ocean heat content during the last millennium – an assessment with the echo-g model |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.archives-ouvertes.fr/hal-03209347 https://hal.archives-ouvertes.fr/hal-03209347/document https://hal.archives-ouvertes.fr/hal-03209347/file/cp-9-547-2013.pdf https://doi.org/10.5194/cp-9-547-2013 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.archives-ouvertes.fr/hal-03209347 Climate of the Past, European Geosciences Union (EGU), 2013, 9 (2), pp.547-565. ⟨10.5194/cp-9-547-2013⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-9-547-2013 hal-03209347 https://hal.archives-ouvertes.fr/hal-03209347 https://hal.archives-ouvertes.fr/hal-03209347/document https://hal.archives-ouvertes.fr/hal-03209347/file/cp-9-547-2013.pdf doi:10.5194/cp-9-547-2013 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/cp-9-547-2013 |
container_title |
Climate of the Past |
container_volume |
9 |
container_issue |
2 |
container_start_page |
547 |
op_container_end_page |
565 |
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1766130011744501760 |