Biomarker stratigraphic records over the last 150 kyears off the NW African coast at 25° N
International audience Terrigenous and marine biomarkers were investigated in a core off Northwest Africa in the Northeast Atlantic (25° N, 16°W, 1445 m depth) to assess changes in the sedimentation pattern of organic carbon (OC) over the last 150 kyears. Alkenone derived temperatures recorded a war...
Published in: | Organic Geochemistry |
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Online Access: | https://hal.archives-ouvertes.fr/hal-01460390 https://doi.org/10.1016/S0146-6380(00)00021-8 |
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ftccsdartic:oai:HAL:hal-01460390v1 2023-05-15T17:33:14+02:00 Biomarker stratigraphic records over the last 150 kyears off the NW African coast at 25° N Sicre, Marie-Alexandrine Ternois, Yann Paterne, Martine Boireau, Anne Beaufort, L Martinez, Philippe Bertrand, Philippe Paléocéanographie (PALEOCEAN) 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) 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) Géochrononologie Traceurs Archéométrie (GEOTRAC) Laboratoire de Physique et Chimie Marines (LPCM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA) Département de Géologie et d'Océanographie Talence (DGO) Université Sciences et Technologies - Bordeaux 1 2000 https://hal.archives-ouvertes.fr/hal-01460390 https://doi.org/10.1016/S0146-6380(00)00021-8 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/S0146-6380(00)00021-8 hal-01460390 https://hal.archives-ouvertes.fr/hal-01460390 doi:10.1016/S0146-6380(00)00021-8 WOS: 000087752900008 ISSN: 0146-6380 Organic Geochemistry https://hal.archives-ouvertes.fr/hal-01460390 Organic Geochemistry, Elsevier, 2000, 31 (6), pp.577-588. ⟨10.1016/S0146-6380(00)00021-8⟩ sterols alkanols paleoceanography alkenones biomarkers Africa upwelling North Atlantic [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2000 ftccsdartic https://doi.org/10.1016/S0146-6380(00)00021-8 2021-12-19T02:38:41Z International audience Terrigenous and marine biomarkers were investigated in a core off Northwest Africa in the Northeast Atlantic (25° N, 16°W, 1445 m depth) to assess changes in the sedimentation pattern of organic carbon (OC) over the last 150 kyears. Alkenone derived temperatures recorded a warming of 4.5° C during the last deglaciation. n-Alkanol Mass Accumulation Rates (MAR) fluctuated in parallel with Northeast Trade Winds (NETW) intensity. OC and sterol MAR both increased during glacial times indicating enhanced fertility of the ocean in response to intensified NETW. Alkenone/OC ratios were higher by a factor of two over stages 4-6 than stages 1-3 thus reflecting distinct coccolirhophorid inputs. This transition coincides with a major change of alkenone producers inferred from coccolith counts. (C) 2000 Elsevier Science Ltd. All rights reserved. Article in Journal/Newspaper North Atlantic Northeast Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Organic Geochemistry 31 6 577 588 |
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 |
sterols alkanols paleoceanography alkenones biomarkers Africa upwelling North Atlantic [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
sterols alkanols paleoceanography alkenones biomarkers Africa upwelling North Atlantic [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Sicre, Marie-Alexandrine Ternois, Yann Paterne, Martine Boireau, Anne Beaufort, L Martinez, Philippe Bertrand, Philippe Biomarker stratigraphic records over the last 150 kyears off the NW African coast at 25° N |
topic_facet |
sterols alkanols paleoceanography alkenones biomarkers Africa upwelling North Atlantic [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Terrigenous and marine biomarkers were investigated in a core off Northwest Africa in the Northeast Atlantic (25° N, 16°W, 1445 m depth) to assess changes in the sedimentation pattern of organic carbon (OC) over the last 150 kyears. Alkenone derived temperatures recorded a warming of 4.5° C during the last deglaciation. n-Alkanol Mass Accumulation Rates (MAR) fluctuated in parallel with Northeast Trade Winds (NETW) intensity. OC and sterol MAR both increased during glacial times indicating enhanced fertility of the ocean in response to intensified NETW. Alkenone/OC ratios were higher by a factor of two over stages 4-6 than stages 1-3 thus reflecting distinct coccolirhophorid inputs. This transition coincides with a major change of alkenone producers inferred from coccolith counts. (C) 2000 Elsevier Science Ltd. All rights reserved. |
author2 |
Paléocéanographie (PALEOCEAN) 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) 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) Géochrononologie Traceurs Archéométrie (GEOTRAC) Laboratoire de Physique et Chimie Marines (LPCM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA) Département de Géologie et d'Océanographie Talence (DGO) Université Sciences et Technologies - Bordeaux 1 |
format |
Article in Journal/Newspaper |
author |
Sicre, Marie-Alexandrine Ternois, Yann Paterne, Martine Boireau, Anne Beaufort, L Martinez, Philippe Bertrand, Philippe |
author_facet |
Sicre, Marie-Alexandrine Ternois, Yann Paterne, Martine Boireau, Anne Beaufort, L Martinez, Philippe Bertrand, Philippe |
author_sort |
Sicre, Marie-Alexandrine |
title |
Biomarker stratigraphic records over the last 150 kyears off the NW African coast at 25° N |
title_short |
Biomarker stratigraphic records over the last 150 kyears off the NW African coast at 25° N |
title_full |
Biomarker stratigraphic records over the last 150 kyears off the NW African coast at 25° N |
title_fullStr |
Biomarker stratigraphic records over the last 150 kyears off the NW African coast at 25° N |
title_full_unstemmed |
Biomarker stratigraphic records over the last 150 kyears off the NW African coast at 25° N |
title_sort |
biomarker stratigraphic records over the last 150 kyears off the nw african coast at 25° n |
publisher |
HAL CCSD |
publishDate |
2000 |
url |
https://hal.archives-ouvertes.fr/hal-01460390 https://doi.org/10.1016/S0146-6380(00)00021-8 |
genre |
North Atlantic Northeast Atlantic |
genre_facet |
North Atlantic Northeast Atlantic |
op_source |
ISSN: 0146-6380 Organic Geochemistry https://hal.archives-ouvertes.fr/hal-01460390 Organic Geochemistry, Elsevier, 2000, 31 (6), pp.577-588. ⟨10.1016/S0146-6380(00)00021-8⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/S0146-6380(00)00021-8 hal-01460390 https://hal.archives-ouvertes.fr/hal-01460390 doi:10.1016/S0146-6380(00)00021-8 WOS: 000087752900008 |
op_doi |
https://doi.org/10.1016/S0146-6380(00)00021-8 |
container_title |
Organic Geochemistry |
container_volume |
31 |
container_issue |
6 |
container_start_page |
577 |
op_container_end_page |
588 |
_version_ |
1766131667054886912 |