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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Main Authors: | , , , , , |
Other Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2000
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Subjects: | |
Online Access: | https://hal.science/hal-01460390 https://doi.org/10.1016/S0146-6380(00)00021-8 |
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HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
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language |
English |
topic |
biomarkers paleoceanography alkenones alkanols sterols 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 |
biomarkers paleoceanography alkenones alkanols sterols 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 Biomarker stratigraphic records over the last 150 kyears off the NW African coast at 25° N |
topic_facet |
biomarkers paleoceanography alkenones alkanols sterols 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) 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)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-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)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) 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) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-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) Département de Géologie et d'Océanographie Talence (DGO) Université Sciences et Technologies - Bordeaux 1 (UB) |
format |
Article in Journal/Newspaper |
author |
Sicre, Marie-Alexandrine Ternois, Yann Paterne, Martine Boireau, Anne Beaufort, L. Martinez, Philippe |
author_facet |
Sicre, Marie-Alexandrine Ternois, Yann Paterne, Martine Boireau, Anne Beaufort, L. Martinez, 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.science/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.science/hal-01460390 Organic Geochemistry, 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.science/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_ |
1810463590854950912 |
spelling |
ftceafr:oai:HAL:hal-01460390v1 2024-09-15T18:23:23+00:00 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 Paléocéanographie (PALEOCEAN) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) 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)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-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)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) 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) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-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) Département de Géologie et d'Océanographie Talence (DGO) Université Sciences et Technologies - Bordeaux 1 (UB) 2000 https://hal.science/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.science/hal-01460390 doi:10.1016/S0146-6380(00)00021-8 WOS: 000087752900008 ISSN: 0146-6380 Organic Geochemistry https://hal.science/hal-01460390 Organic Geochemistry, 2000, 31 (6), pp.577-588. ⟨10.1016/S0146-6380(00)00021-8⟩ biomarkers paleoceanography alkenones alkanols sterols 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 ftceafr https://doi.org/10.1016/S0146-6380(00)00021-8 2024-07-22T13:29:20Z 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 HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Organic Geochemistry 31 6 577 588 |