Contrasting sea-surface responses between the western Mediterranean Sea and eastern subtropical latitudes of the North Atlantic during abrupt climatic events of MIS 3
EuroCLIMATE project RESOLuTION International audience Abstract Dinoflagellate cyst (dinocyst) analysis was conducted on two cores from the SW Iberian margin and central Alboran Sea from which high quality records of Marine Isotope Stage 3 have been previously derived. Our aim in this study is to com...
Published in: | Marine Micropaleontology |
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Main Authors: | , , , , , |
Other Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2011
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-00588836 https://hal-insu.archives-ouvertes.fr/insu-00588836/document https://hal-insu.archives-ouvertes.fr/insu-00588836/file/Penaud-MarMic-2011-1.pdf https://doi.org/10.1016/j.marmicro.2011.03.002 |
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ftinsu:oai:HAL:insu-00588836v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Dinocysts SST and SSS quantification Dansgaard-Oeschger Greenland and Heinrich stadials Alboran Sea Iberian margin [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology |
spellingShingle |
Dinocysts SST and SSS quantification Dansgaard-Oeschger Greenland and Heinrich stadials Alboran Sea Iberian margin [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology Pénaud, Aurélie Eynaud, Frédérique Sánchez-Goñi, María-Fernanda Malaize, B. Turon, Jean-Louis Rossignol, L. Contrasting sea-surface responses between the western Mediterranean Sea and eastern subtropical latitudes of the North Atlantic during abrupt climatic events of MIS 3 |
topic_facet |
Dinocysts SST and SSS quantification Dansgaard-Oeschger Greenland and Heinrich stadials Alboran Sea Iberian margin [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology |
description |
EuroCLIMATE project RESOLuTION International audience Abstract Dinoflagellate cyst (dinocyst) analysis was conducted on two cores from the SW Iberian margin and central Alboran Sea from which high quality records of Marine Isotope Stage 3 have been previously derived. Our aim in this study is to compare the dinocyst signature between 50 and 25 ka BP with existing datasets of foraminiferal and geochemical proxies related to hydrological parameters. Quantitative reconstructions of sea-surface temperatures (SSTs) and salinities (SSS) based on dinocysts are performed for the first time in this area. The results are compared to SSTs derived from planktonic foraminifera and alkenone measurements, and to SSS calculated from planktonic δ18O and foraminiferal SST. Significant oscillations related to Dansgaard-Oeschger cycles are recorded in both cores. Dinocyst-derived hydrological parameters exhibit synchronous fluctuations and similar values to those derived from the other methods, in particular when considering quantitative reconstructions for February based on foraminifera and dinocysts. Our study shows that the influence of subpolar waters was felt during each Greenland Stadial (GS) off Portugal, and that the amplification of the Heinrich Stadial cooling in the Alboran Sea was related to the penetration of subpolar waters through the Strait of Gibraltar. During Greenland Interstadials (GI), we provide evidence for the occurrence of warm and nutrient-rich sea-surface waters in the Alboran Sea, probably due to gyre-induced upwelling. Finally, the difference between August and February dinocyst SST estimates suggests higher seasonal contrasts during GS compared to GI at the two core sites. Additionally, precession appears to have an imprint on dinocyst-derived long-term seasonality record. However, this observation needs to be confirmed by longer records. Research Highlights ► We provide new dinocyst data on core MD95-2043 (Alboran Sea) during MIS 3. ► Quantitative dinocyst sea-surface parameters (SST, SSS) are ... |
author2 |
Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Domaines Océaniques (LDO) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Pénaud, Aurélie Eynaud, Frédérique Sánchez-Goñi, María-Fernanda Malaize, B. Turon, Jean-Louis Rossignol, L. |
author_facet |
Pénaud, Aurélie Eynaud, Frédérique Sánchez-Goñi, María-Fernanda Malaize, B. Turon, Jean-Louis Rossignol, L. |
author_sort |
Pénaud, Aurélie |
title |
Contrasting sea-surface responses between the western Mediterranean Sea and eastern subtropical latitudes of the North Atlantic during abrupt climatic events of MIS 3 |
title_short |
Contrasting sea-surface responses between the western Mediterranean Sea and eastern subtropical latitudes of the North Atlantic during abrupt climatic events of MIS 3 |
title_full |
Contrasting sea-surface responses between the western Mediterranean Sea and eastern subtropical latitudes of the North Atlantic during abrupt climatic events of MIS 3 |
title_fullStr |
Contrasting sea-surface responses between the western Mediterranean Sea and eastern subtropical latitudes of the North Atlantic during abrupt climatic events of MIS 3 |
title_full_unstemmed |
Contrasting sea-surface responses between the western Mediterranean Sea and eastern subtropical latitudes of the North Atlantic during abrupt climatic events of MIS 3 |
title_sort |
contrasting sea-surface responses between the western mediterranean sea and eastern subtropical latitudes of the north atlantic during abrupt climatic events of mis 3 |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00588836 https://hal-insu.archives-ouvertes.fr/insu-00588836/document https://hal-insu.archives-ouvertes.fr/insu-00588836/file/Penaud-MarMic-2011-1.pdf https://doi.org/10.1016/j.marmicro.2011.03.002 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland North Atlantic Planktonic foraminifera |
genre_facet |
Greenland North Atlantic Planktonic foraminifera |
op_source |
ISSN: 0377-8398 Marine Micropaleontology https://hal-insu.archives-ouvertes.fr/insu-00588836 Marine Micropaleontology, 2011, 80, pp.1-17. ⟨10.1016/j.marmicro.2011.03.002⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.marmicro.2011.03.002 insu-00588836 https://hal-insu.archives-ouvertes.fr/insu-00588836 https://hal-insu.archives-ouvertes.fr/insu-00588836/document https://hal-insu.archives-ouvertes.fr/insu-00588836/file/Penaud-MarMic-2011-1.pdf doi:10.1016/j.marmicro.2011.03.002 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.marmicro.2011.03.002 |
container_title |
Marine Micropaleontology |
container_volume |
80 |
container_issue |
1-2 |
container_start_page |
1 |
op_container_end_page |
17 |
_version_ |
1769006253357400064 |
spelling |
ftinsu:oai:HAL:insu-00588836v1 2023-06-18T03:40:54+02:00 Contrasting sea-surface responses between the western Mediterranean Sea and eastern subtropical latitudes of the North Atlantic during abrupt climatic events of MIS 3 Pénaud, Aurélie Eynaud, Frédérique Sánchez-Goñi, María-Fernanda Malaize, B. Turon, Jean-Louis Rossignol, L. Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Domaines Océaniques (LDO) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) 2011-03-11 https://hal-insu.archives-ouvertes.fr/insu-00588836 https://hal-insu.archives-ouvertes.fr/insu-00588836/document https://hal-insu.archives-ouvertes.fr/insu-00588836/file/Penaud-MarMic-2011-1.pdf https://doi.org/10.1016/j.marmicro.2011.03.002 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.marmicro.2011.03.002 insu-00588836 https://hal-insu.archives-ouvertes.fr/insu-00588836 https://hal-insu.archives-ouvertes.fr/insu-00588836/document https://hal-insu.archives-ouvertes.fr/insu-00588836/file/Penaud-MarMic-2011-1.pdf doi:10.1016/j.marmicro.2011.03.002 info:eu-repo/semantics/OpenAccess ISSN: 0377-8398 Marine Micropaleontology https://hal-insu.archives-ouvertes.fr/insu-00588836 Marine Micropaleontology, 2011, 80, pp.1-17. ⟨10.1016/j.marmicro.2011.03.002⟩ Dinocysts SST and SSS quantification Dansgaard-Oeschger Greenland and Heinrich stadials Alboran Sea Iberian margin [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology info:eu-repo/semantics/article Journal articles 2011 ftinsu https://doi.org/10.1016/j.marmicro.2011.03.002 2023-06-05T19:08:20Z EuroCLIMATE project RESOLuTION International audience Abstract Dinoflagellate cyst (dinocyst) analysis was conducted on two cores from the SW Iberian margin and central Alboran Sea from which high quality records of Marine Isotope Stage 3 have been previously derived. Our aim in this study is to compare the dinocyst signature between 50 and 25 ka BP with existing datasets of foraminiferal and geochemical proxies related to hydrological parameters. Quantitative reconstructions of sea-surface temperatures (SSTs) and salinities (SSS) based on dinocysts are performed for the first time in this area. The results are compared to SSTs derived from planktonic foraminifera and alkenone measurements, and to SSS calculated from planktonic δ18O and foraminiferal SST. Significant oscillations related to Dansgaard-Oeschger cycles are recorded in both cores. Dinocyst-derived hydrological parameters exhibit synchronous fluctuations and similar values to those derived from the other methods, in particular when considering quantitative reconstructions for February based on foraminifera and dinocysts. Our study shows that the influence of subpolar waters was felt during each Greenland Stadial (GS) off Portugal, and that the amplification of the Heinrich Stadial cooling in the Alboran Sea was related to the penetration of subpolar waters through the Strait of Gibraltar. During Greenland Interstadials (GI), we provide evidence for the occurrence of warm and nutrient-rich sea-surface waters in the Alboran Sea, probably due to gyre-induced upwelling. Finally, the difference between August and February dinocyst SST estimates suggests higher seasonal contrasts during GS compared to GI at the two core sites. Additionally, precession appears to have an imprint on dinocyst-derived long-term seasonality record. However, this observation needs to be confirmed by longer records. Research Highlights ► We provide new dinocyst data on core MD95-2043 (Alboran Sea) during MIS 3. ► Quantitative dinocyst sea-surface parameters (SST, SSS) are ... Article in Journal/Newspaper Greenland North Atlantic Planktonic foraminifera Institut national des sciences de l'Univers: HAL-INSU Greenland Marine Micropaleontology 80 1-2 1 17 |