The Novel Hydroxylated Tetraether Index RI‐OH′ as a Sea Surface Temperature Proxy for the 160–45 ka BP Period Off the Iberian Margin
International audience RI‐OH′ and RI‐OH (ring index of hydroxylated tetraethers) are two novel organic paleothermometers which could either complement or replace more established paleothermometric proxies, such as UK′37 (C37 ketone unsaturation ratio) and TEX86 (TetraEther indeX of tetraethers consi...
Published in: | Paleoceanography and Paleoclimatology |
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Main Authors: | , , , , |
Other Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2021
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-03149372 https://hal.archives-ouvertes.fr/hal-03149372/document https://hal.archives-ouvertes.fr/hal-03149372/file/81833.pdf https://doi.org/10.1029/2020PA004077 |
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openpolar |
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Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDE.MCG]Environmental Sciences/Global Changes Davtian, Nina Bard, Edouard Darfeuil, Sophie Ménot, Guillemette Rostek, Frauke The Novel Hydroxylated Tetraether Index RI‐OH′ as a Sea Surface Temperature Proxy for the 160–45 ka BP Period Off the Iberian Margin |
topic_facet |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience RI‐OH′ and RI‐OH (ring index of hydroxylated tetraethers) are two novel organic paleothermometers which could either complement or replace more established paleothermometric proxies, such as UK′37 (C37 ketone unsaturation ratio) and TEX86 (TetraEther indeX of tetraethers consisting of 86 carbon atoms). Despite a few promising attempts, the paleothermometric potential of RI‐OH′ and RI‐OH is not fully constrained. Here we present new high‐resolution temperature records over the 160‐45 ka BP (before present = year 1950 CE) period using four organic proxies (RI‐OH′, RI‐OH, TEX86, and UK′37) from three deep sea sediment cores located in a north‐south transect along the Iberian Margin. We analyzed all organic proxies from a single set of lipid extracts to optimize proxy‐proxy comparisons and phase relationship studies. RI‐OH′ responds to Dansgaard‐Oeschger and Heinrich events, better resembles UK′37 than TEX86, and better records the influence of (sub)polar waters during Heinrich events than does RI‐OH. While RI‐OH′ gives realistic sea surface temperatures and latitudinal gradients coherent with those from independent paleothermometers, a more extensive RI‐OH′‐temperature calibration for the North Atlantic is clearly needed. However, the absence of a significant warm bias in RI‐OH′‐based temperatures compared to a shallow sea site suggests that endemic, deep‐dwelling archeal communities affect TEX86 but not RI‐OH′ in the Iberian Margin. TEX86 leads RI‐OH′ and UK′37 during four Heinrich‐like events, potentially due to background fluxes from deep waters for nonhydroxylated tetraethers summed with primary productivity dependent fluxes from surface waters for all investigated lipid classes. Relationships with Greenland temperatures further support RI‐OH′‐based paleothermometry. |
author2 |
Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement Lyon (LGL-TPE) École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) BNP-Paribas Foundation (project CPATEMP)IMAGES programCollege de France |
format |
Article in Journal/Newspaper |
author |
Davtian, Nina Bard, Edouard Darfeuil, Sophie Ménot, Guillemette Rostek, Frauke |
author_facet |
Davtian, Nina Bard, Edouard Darfeuil, Sophie Ménot, Guillemette Rostek, Frauke |
author_sort |
Davtian, Nina |
title |
The Novel Hydroxylated Tetraether Index RI‐OH′ as a Sea Surface Temperature Proxy for the 160–45 ka BP Period Off the Iberian Margin |
title_short |
The Novel Hydroxylated Tetraether Index RI‐OH′ as a Sea Surface Temperature Proxy for the 160–45 ka BP Period Off the Iberian Margin |
title_full |
The Novel Hydroxylated Tetraether Index RI‐OH′ as a Sea Surface Temperature Proxy for the 160–45 ka BP Period Off the Iberian Margin |
title_fullStr |
The Novel Hydroxylated Tetraether Index RI‐OH′ as a Sea Surface Temperature Proxy for the 160–45 ka BP Period Off the Iberian Margin |
title_full_unstemmed |
The Novel Hydroxylated Tetraether Index RI‐OH′ as a Sea Surface Temperature Proxy for the 160–45 ka BP Period Off the Iberian Margin |
title_sort |
novel hydroxylated tetraether index ri‐oh′ as a sea surface temperature proxy for the 160–45 ka bp period off the iberian margin |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.archives-ouvertes.fr/hal-03149372 https://hal.archives-ouvertes.fr/hal-03149372/document https://hal.archives-ouvertes.fr/hal-03149372/file/81833.pdf https://doi.org/10.1029/2020PA004077 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland North Atlantic |
genre_facet |
Greenland North Atlantic |
op_source |
ISSN: 2572-4525 EISSN: 1944-9186 Paleoceanography and Paleoclimatology https://hal.archives-ouvertes.fr/hal-03149372 Paleoceanography and Paleoclimatology, American Geophysical Union, 2021, 36 (3), pp.e2020PA004077. ⟨10.1029/2020PA004077⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2020PA004077 hal-03149372 https://hal.archives-ouvertes.fr/hal-03149372 https://hal.archives-ouvertes.fr/hal-03149372/document https://hal.archives-ouvertes.fr/hal-03149372/file/81833.pdf doi:10.1029/2020PA004077 WOS: 000635265600014 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2020PA004077 |
container_title |
Paleoceanography and Paleoclimatology |
container_volume |
36 |
container_issue |
3 |
_version_ |
1766019944393211904 |
spelling |
ftunivnantes:oai:HAL:hal-03149372v1 2023-05-15T16:30:14+02:00 The Novel Hydroxylated Tetraether Index RI‐OH′ as a Sea Surface Temperature Proxy for the 160–45 ka BP Period Off the Iberian Margin Davtian, Nina Bard, Edouard Darfeuil, Sophie Ménot, Guillemette Rostek, Frauke Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement Lyon (LGL-TPE) École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) BNP-Paribas Foundation (project CPATEMP)IMAGES programCollege de France 2021 https://hal.archives-ouvertes.fr/hal-03149372 https://hal.archives-ouvertes.fr/hal-03149372/document https://hal.archives-ouvertes.fr/hal-03149372/file/81833.pdf https://doi.org/10.1029/2020PA004077 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2020PA004077 hal-03149372 https://hal.archives-ouvertes.fr/hal-03149372 https://hal.archives-ouvertes.fr/hal-03149372/document https://hal.archives-ouvertes.fr/hal-03149372/file/81833.pdf doi:10.1029/2020PA004077 WOS: 000635265600014 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 2572-4525 EISSN: 1944-9186 Paleoceanography and Paleoclimatology https://hal.archives-ouvertes.fr/hal-03149372 Paleoceanography and Paleoclimatology, American Geophysical Union, 2021, 36 (3), pp.e2020PA004077. ⟨10.1029/2020PA004077⟩ [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2021 ftunivnantes https://doi.org/10.1029/2020PA004077 2022-06-21T22:44:01Z International audience RI‐OH′ and RI‐OH (ring index of hydroxylated tetraethers) are two novel organic paleothermometers which could either complement or replace more established paleothermometric proxies, such as UK′37 (C37 ketone unsaturation ratio) and TEX86 (TetraEther indeX of tetraethers consisting of 86 carbon atoms). Despite a few promising attempts, the paleothermometric potential of RI‐OH′ and RI‐OH is not fully constrained. Here we present new high‐resolution temperature records over the 160‐45 ka BP (before present = year 1950 CE) period using four organic proxies (RI‐OH′, RI‐OH, TEX86, and UK′37) from three deep sea sediment cores located in a north‐south transect along the Iberian Margin. We analyzed all organic proxies from a single set of lipid extracts to optimize proxy‐proxy comparisons and phase relationship studies. RI‐OH′ responds to Dansgaard‐Oeschger and Heinrich events, better resembles UK′37 than TEX86, and better records the influence of (sub)polar waters during Heinrich events than does RI‐OH. While RI‐OH′ gives realistic sea surface temperatures and latitudinal gradients coherent with those from independent paleothermometers, a more extensive RI‐OH′‐temperature calibration for the North Atlantic is clearly needed. However, the absence of a significant warm bias in RI‐OH′‐based temperatures compared to a shallow sea site suggests that endemic, deep‐dwelling archeal communities affect TEX86 but not RI‐OH′ in the Iberian Margin. TEX86 leads RI‐OH′ and UK′37 during four Heinrich‐like events, potentially due to background fluxes from deep waters for nonhydroxylated tetraethers summed with primary productivity dependent fluxes from surface waters for all investigated lipid classes. Relationships with Greenland temperatures further support RI‐OH′‐based paleothermometry. Article in Journal/Newspaper Greenland North Atlantic Université de Nantes: HAL-UNIV-NANTES Greenland Paleoceanography and Paleoclimatology 36 3 |