Rapid switches in subpolar North Atlantic hydrography and climate during the Last Interglacial (MIS 5e)
International audience At the peak of the previous interglacial period, North Atlantic and subpolar climate shared many features in common with projections of our future climate, including warmer‐than‐present conditions and a diminished Greenland Ice Sheet (GIS). Here we portray changes in North Atl...
Published in: | Paleoceanography |
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Main Authors: | , , , , , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2012
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-03118211 https://hal.archives-ouvertes.fr/hal-03118211/document https://hal.archives-ouvertes.fr/hal-03118211/file/2011PA002244.pdf https://doi.org/10.1029/2011PA002244 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Irvalı, Nil Ninnemann, Ulysses Galaasen, Eirik Rosenthal, Yair Kroon, Dick Oppo, Delia Kleiven, Helga Darling, Kate Kissel, Catherine Rapid switches in subpolar North Atlantic hydrography and climate during the Last Interglacial (MIS 5e) |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience At the peak of the previous interglacial period, North Atlantic and subpolar climate shared many features in common with projections of our future climate, including warmer‐than‐present conditions and a diminished Greenland Ice Sheet (GIS). Here we portray changes in North Atlantic hydrography linked with Greenland climate during Marine Isotope Stage (MIS) 5e using (sub)centennially sampled records of planktonic foraminiferal isotopes and assemblage counts and ice‐rafted debris counts, as well as modern analog technique and Mg/Ca‐based paleothermometry. We use the core MD03‐2664 recovered from a high accumulation rate site (∼34 cm/kyr) on the Eirik sediment drift (57°26.34′N, 48°36.35′W). The results indicate that surface waters off southern Greenland were ∼3–5°C warmer than today during early MIS 5e. These anomalously warm sea surface temperatures (SSTs) prevailed until the isotopic peak of MIS 5e when they were interrupted by a cooling event beginning at ∼126 kyr BP. This interglacial cooling event is followed by a gradual warming with SSTs subsequently plateauing just below early MIS 5e values. A planktonic δ18O minimum during the cooling event indicates that marked freshening of the surface waters accompanied the cooling. We suggest that switches in the subpolar gyre hydrography occurred during a warmer climate, involving regional changes in freshwater fluxes/balance and East Greenland Current influence in the study area. The nature of these hydrographic transitions suggests that they are most likely related to large‐scale circulation dynamics, potentially amplified by GIS meltwater influences. |
author2 |
Bjerknes Centre for Climate Research (BCCR) Department of Biological Sciences Bergen (BIO / UiB) University of Bergen (UiB)-University of Bergen (UiB) Rutgers, The State University of New Jersey New Brunswick (RU) Rutgers University System (Rutgers) School of Geosciences Edinburgh University of Edinburgh Woods Hole Oceanographic Institution (WHOI) Climat et Magnétisme (CLIMAG) 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)-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 |
Irvalı, Nil Ninnemann, Ulysses Galaasen, Eirik Rosenthal, Yair Kroon, Dick Oppo, Delia Kleiven, Helga Darling, Kate Kissel, Catherine |
author_facet |
Irvalı, Nil Ninnemann, Ulysses Galaasen, Eirik Rosenthal, Yair Kroon, Dick Oppo, Delia Kleiven, Helga Darling, Kate Kissel, Catherine |
author_sort |
Irvalı, Nil |
title |
Rapid switches in subpolar North Atlantic hydrography and climate during the Last Interglacial (MIS 5e) |
title_short |
Rapid switches in subpolar North Atlantic hydrography and climate during the Last Interglacial (MIS 5e) |
title_full |
Rapid switches in subpolar North Atlantic hydrography and climate during the Last Interglacial (MIS 5e) |
title_fullStr |
Rapid switches in subpolar North Atlantic hydrography and climate during the Last Interglacial (MIS 5e) |
title_full_unstemmed |
Rapid switches in subpolar North Atlantic hydrography and climate during the Last Interglacial (MIS 5e) |
title_sort |
rapid switches in subpolar north atlantic hydrography and climate during the last interglacial (mis 5e) |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.archives-ouvertes.fr/hal-03118211 https://hal.archives-ouvertes.fr/hal-03118211/document https://hal.archives-ouvertes.fr/hal-03118211/file/2011PA002244.pdf https://doi.org/10.1029/2011PA002244 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
East Greenland east greenland current Greenland Ice Sheet North Atlantic |
genre_facet |
East Greenland east greenland current Greenland Ice Sheet North Atlantic |
op_source |
ISSN: 0883-8305 Paleoceanography https://hal.archives-ouvertes.fr/hal-03118211 Paleoceanography, American Geophysical Union, 2012, 27 (2), pp.PA2207. ⟨10.1029/2011PA002244⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2011PA002244 hal-03118211 https://hal.archives-ouvertes.fr/hal-03118211 https://hal.archives-ouvertes.fr/hal-03118211/document https://hal.archives-ouvertes.fr/hal-03118211/file/2011PA002244.pdf doi:10.1029/2011PA002244 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2011PA002244 |
container_title |
Paleoceanography |
container_volume |
27 |
container_issue |
2 |
container_start_page |
n/a |
op_container_end_page |
n/a |
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1766399574571745280 |
spelling |
ftccsdartic:oai:HAL:hal-03118211v1 2023-05-15T16:03:53+02:00 Rapid switches in subpolar North Atlantic hydrography and climate during the Last Interglacial (MIS 5e) Irvalı, Nil Ninnemann, Ulysses Galaasen, Eirik Rosenthal, Yair Kroon, Dick Oppo, Delia Kleiven, Helga Darling, Kate Kissel, Catherine Bjerknes Centre for Climate Research (BCCR) Department of Biological Sciences Bergen (BIO / UiB) University of Bergen (UiB)-University of Bergen (UiB) Rutgers, The State University of New Jersey New Brunswick (RU) Rutgers University System (Rutgers) School of Geosciences Edinburgh University of Edinburgh Woods Hole Oceanographic Institution (WHOI) Climat et Magnétisme (CLIMAG) 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)-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) 2012 https://hal.archives-ouvertes.fr/hal-03118211 https://hal.archives-ouvertes.fr/hal-03118211/document https://hal.archives-ouvertes.fr/hal-03118211/file/2011PA002244.pdf https://doi.org/10.1029/2011PA002244 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2011PA002244 hal-03118211 https://hal.archives-ouvertes.fr/hal-03118211 https://hal.archives-ouvertes.fr/hal-03118211/document https://hal.archives-ouvertes.fr/hal-03118211/file/2011PA002244.pdf doi:10.1029/2011PA002244 info:eu-repo/semantics/OpenAccess ISSN: 0883-8305 Paleoceanography https://hal.archives-ouvertes.fr/hal-03118211 Paleoceanography, American Geophysical Union, 2012, 27 (2), pp.PA2207. ⟨10.1029/2011PA002244⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2012 ftccsdartic https://doi.org/10.1029/2011PA002244 2021-12-19T00:33:04Z International audience At the peak of the previous interglacial period, North Atlantic and subpolar climate shared many features in common with projections of our future climate, including warmer‐than‐present conditions and a diminished Greenland Ice Sheet (GIS). Here we portray changes in North Atlantic hydrography linked with Greenland climate during Marine Isotope Stage (MIS) 5e using (sub)centennially sampled records of planktonic foraminiferal isotopes and assemblage counts and ice‐rafted debris counts, as well as modern analog technique and Mg/Ca‐based paleothermometry. We use the core MD03‐2664 recovered from a high accumulation rate site (∼34 cm/kyr) on the Eirik sediment drift (57°26.34′N, 48°36.35′W). The results indicate that surface waters off southern Greenland were ∼3–5°C warmer than today during early MIS 5e. These anomalously warm sea surface temperatures (SSTs) prevailed until the isotopic peak of MIS 5e when they were interrupted by a cooling event beginning at ∼126 kyr BP. This interglacial cooling event is followed by a gradual warming with SSTs subsequently plateauing just below early MIS 5e values. A planktonic δ18O minimum during the cooling event indicates that marked freshening of the surface waters accompanied the cooling. We suggest that switches in the subpolar gyre hydrography occurred during a warmer climate, involving regional changes in freshwater fluxes/balance and East Greenland Current influence in the study area. The nature of these hydrographic transitions suggests that they are most likely related to large‐scale circulation dynamics, potentially amplified by GIS meltwater influences. Article in Journal/Newspaper East Greenland east greenland current Greenland Ice Sheet North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Greenland Paleoceanography 27 2 n/a n/a |