Holocene North Atlantic Overturning in an atmosphere-ocean-sea ice model compared to proxy-based reconstructions
International audience Climate and ocean circulation in the North Atlantic region changed over the course of the Holocene, partly because of disintegrating ice sheets and partly because of an orbital-induced insolation trend. In the Nordic Seas, this impact was accompanied by a rather small, but sig...
Published in: | Paleoceanography |
---|---|
Main Authors: | , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2015
|
Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-01805163 https://hal.archives-ouvertes.fr/hal-01805163/document https://hal.archives-ouvertes.fr/hal-01805163/file/2015PA002828.pdf https://doi.org/10.1002/2015PA002828 |
id |
ftccsdartic:oai:HAL:hal-01805163v1 |
---|---|
record_format |
openpolar |
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.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Blaschek, M. Renssen, H. Kissel, Catherine Thornalley, D. Holocene North Atlantic Overturning in an atmosphere-ocean-sea ice model compared to proxy-based reconstructions |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience Climate and ocean circulation in the North Atlantic region changed over the course of the Holocene, partly because of disintegrating ice sheets and partly because of an orbital-induced insolation trend. In the Nordic Seas, this impact was accompanied by a rather small, but significant, amount of Greenland ice sheet melting. We have employed the EMIC LOVECLIM and compared our model simulations with proxy-based reconstructions of δ 13 C, sortable silt, and magnetic susceptibility (κ) used to infer changes in past ocean circulation over the last 9000 years. The various reconstructions exhibit different long-term evolutions suggesting changes in either the overturning of the Atlantic in total or of subcomponents of the ocean circulation, such as the overflow waters across the Greenland-Scotland ridge. Thus, the question arises whether these reconstructions are consistent with each other or not. A comparison with model results indicates that δ 13 C, employed as an indicator of overturning, agrees well with the long-term evolution of the modeled Atlantic meridional overturning circulation (AMOC). The model results suggest that different long-term trends in subcomponents of the AMOC, such as Iceland-Scotland overflow water, are consistent with proxy-based reconstructions and allow some of the reconstructions to be reconciled with the modeled and reconstructed (from δ 13 C) AMOC evolution. We find a weak early Holocene AMOC, which recovers by 7 kyr B.P. and shows a weak increasing trend of 88 ± 1 mSv/kyr toward present, with relatively low variability on centennial to millennial timescales. |
author2 |
Vrije Universiteit Amsterdam Amsterdam (VU) 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) Climat et Magnétisme (CLIMAG) 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)-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) University College of London London (UCL) Woods Hole Oceanographic Institution (WHOI) |
format |
Article in Journal/Newspaper |
author |
Blaschek, M. Renssen, H. Kissel, Catherine Thornalley, D. |
author_facet |
Blaschek, M. Renssen, H. Kissel, Catherine Thornalley, D. |
author_sort |
Blaschek, M. |
title |
Holocene North Atlantic Overturning in an atmosphere-ocean-sea ice model compared to proxy-based reconstructions |
title_short |
Holocene North Atlantic Overturning in an atmosphere-ocean-sea ice model compared to proxy-based reconstructions |
title_full |
Holocene North Atlantic Overturning in an atmosphere-ocean-sea ice model compared to proxy-based reconstructions |
title_fullStr |
Holocene North Atlantic Overturning in an atmosphere-ocean-sea ice model compared to proxy-based reconstructions |
title_full_unstemmed |
Holocene North Atlantic Overturning in an atmosphere-ocean-sea ice model compared to proxy-based reconstructions |
title_sort |
holocene north atlantic overturning in an atmosphere-ocean-sea ice model compared to proxy-based reconstructions |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.archives-ouvertes.fr/hal-01805163 https://hal.archives-ouvertes.fr/hal-01805163/document https://hal.archives-ouvertes.fr/hal-01805163/file/2015PA002828.pdf https://doi.org/10.1002/2015PA002828 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland-Scotland Ridge Ice Sheet Iceland Nordic Seas North Atlantic Sea ice |
genre_facet |
Greenland Greenland-Scotland Ridge Ice Sheet Iceland Nordic Seas North Atlantic Sea ice |
op_source |
ISSN: 0883-8305 Paleoceanography https://hal.archives-ouvertes.fr/hal-01805163 Paleoceanography, American Geophysical Union, 2015, 30 (11), pp.1503 - 1524. ⟨10.1002/2015PA002828⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2015PA002828 hal-01805163 https://hal.archives-ouvertes.fr/hal-01805163 https://hal.archives-ouvertes.fr/hal-01805163/document https://hal.archives-ouvertes.fr/hal-01805163/file/2015PA002828.pdf doi:10.1002/2015PA002828 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/2015PA002828 |
container_title |
Paleoceanography |
container_volume |
30 |
container_issue |
11 |
container_start_page |
1503 |
op_container_end_page |
1524 |
_version_ |
1766018166274654208 |
spelling |
ftccsdartic:oai:HAL:hal-01805163v1 2023-05-15T16:28:31+02:00 Holocene North Atlantic Overturning in an atmosphere-ocean-sea ice model compared to proxy-based reconstructions Blaschek, M. Renssen, H. Kissel, Catherine Thornalley, D. Vrije Universiteit Amsterdam Amsterdam (VU) 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) Climat et Magnétisme (CLIMAG) 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)-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) University College of London London (UCL) Woods Hole Oceanographic Institution (WHOI) 2015 https://hal.archives-ouvertes.fr/hal-01805163 https://hal.archives-ouvertes.fr/hal-01805163/document https://hal.archives-ouvertes.fr/hal-01805163/file/2015PA002828.pdf https://doi.org/10.1002/2015PA002828 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1002/2015PA002828 hal-01805163 https://hal.archives-ouvertes.fr/hal-01805163 https://hal.archives-ouvertes.fr/hal-01805163/document https://hal.archives-ouvertes.fr/hal-01805163/file/2015PA002828.pdf doi:10.1002/2015PA002828 info:eu-repo/semantics/OpenAccess ISSN: 0883-8305 Paleoceanography https://hal.archives-ouvertes.fr/hal-01805163 Paleoceanography, American Geophysical Union, 2015, 30 (11), pp.1503 - 1524. ⟨10.1002/2015PA002828⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2015 ftccsdartic https://doi.org/10.1002/2015PA002828 2021-12-19T00:55:30Z International audience Climate and ocean circulation in the North Atlantic region changed over the course of the Holocene, partly because of disintegrating ice sheets and partly because of an orbital-induced insolation trend. In the Nordic Seas, this impact was accompanied by a rather small, but significant, amount of Greenland ice sheet melting. We have employed the EMIC LOVECLIM and compared our model simulations with proxy-based reconstructions of δ 13 C, sortable silt, and magnetic susceptibility (κ) used to infer changes in past ocean circulation over the last 9000 years. The various reconstructions exhibit different long-term evolutions suggesting changes in either the overturning of the Atlantic in total or of subcomponents of the ocean circulation, such as the overflow waters across the Greenland-Scotland ridge. Thus, the question arises whether these reconstructions are consistent with each other or not. A comparison with model results indicates that δ 13 C, employed as an indicator of overturning, agrees well with the long-term evolution of the modeled Atlantic meridional overturning circulation (AMOC). The model results suggest that different long-term trends in subcomponents of the AMOC, such as Iceland-Scotland overflow water, are consistent with proxy-based reconstructions and allow some of the reconstructions to be reconciled with the modeled and reconstructed (from δ 13 C) AMOC evolution. We find a weak early Holocene AMOC, which recovers by 7 kyr B.P. and shows a weak increasing trend of 88 ± 1 mSv/kyr toward present, with relatively low variability on centennial to millennial timescales. Article in Journal/Newspaper Greenland Greenland-Scotland Ridge Ice Sheet Iceland Nordic Seas North Atlantic Sea ice Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Greenland Paleoceanography 30 11 1503 1524 |