Major factors controlling Holocene δ 13 C org changes in a seasonal sea-ice environment, Adélie Land, East Antarctica
International audience In an effort to investigate the controlling factors behind Holocene d 13 C org changes in East Antarctica we report high-resolution down-core records of bulk organic matter carbon isotopic ratios (d 13 C org), diatom census counts, total organic carbon, and biogenic silica con...
Published in: | Global Biogeochemical Cycles |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://hal.archives-ouvertes.fr/hal-02105693 https://hal.archives-ouvertes.fr/hal-02105693/document https://hal.archives-ouvertes.fr/hal-02105693/file/Crosta_GBC2005b.pdf https://doi.org/10.1029/2004GB002426 |
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ftccsdartic:oai:HAL:hal-02105693v1 2023-05-15T14:03:01+02:00 Major factors controlling Holocene δ 13 C org changes in a seasonal sea-ice environment, Adélie Land, East Antarctica Crosta, X. Crespin, J. Billy, I. Ther, O. Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-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) Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) 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) 2005 https://hal.archives-ouvertes.fr/hal-02105693 https://hal.archives-ouvertes.fr/hal-02105693/document https://hal.archives-ouvertes.fr/hal-02105693/file/Crosta_GBC2005b.pdf https://doi.org/10.1029/2004GB002426 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2004GB002426 hal-02105693 https://hal.archives-ouvertes.fr/hal-02105693 https://hal.archives-ouvertes.fr/hal-02105693/document https://hal.archives-ouvertes.fr/hal-02105693/file/Crosta_GBC2005b.pdf doi:10.1029/2004GB002426 info:eu-repo/semantics/OpenAccess ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.archives-ouvertes.fr/hal-02105693 Global Biogeochemical Cycles, American Geophysical Union, 2005, 19 (4), pp.GB4029. ⟨10.1029/2004GB002426⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [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 2005 ftccsdartic https://doi.org/10.1029/2004GB002426 2021-11-21T01:31:59Z International audience In an effort to investigate the controlling factors behind Holocene d 13 C org changes in East Antarctica we report high-resolution down-core records of bulk organic matter carbon isotopic ratios (d 13 C org), diatom census counts, total organic carbon, and biogenic silica content taken from one core recovered in the Adélie Trough. A good correspondence between the d 13 C org record and records of small/large and pennate/centric ratios in many of the core segments indicates that diatom species composition affected Holocene d 13 C org variations, possibly via diatom shape and size effects. Variations in the surface water CO 2 concentration and in the isotopic composition of the source during the Holocene cannot be ruled out although they cannot explain rapid and large-amplitude d 13 C org changes. Within the limit of our investigation, our results argue against active carbon acquisition through a carbon concentration mechanism as evidenced in low-latitude upwelling systems. The bulk organic matter thus represents a mixing of diatom taxa having different fractionation affinity to aqueous CO 2. Our results confirm previous evidence which demonstrates that d 13 C org down-core records should be used with great caution to reconstruct past CO 2 content in surface waters. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Sea ice Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Adélie Trough ENVELOPE(136.000,136.000,-65.500,-65.500) East Antarctica Global Biogeochemical Cycles 19 4 n/a n/a |
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 |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Crosta, X. Crespin, J. Billy, I. Ther, O. Major factors controlling Holocene δ 13 C org changes in a seasonal sea-ice environment, Adélie Land, East Antarctica |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [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 In an effort to investigate the controlling factors behind Holocene d 13 C org changes in East Antarctica we report high-resolution down-core records of bulk organic matter carbon isotopic ratios (d 13 C org), diatom census counts, total organic carbon, and biogenic silica content taken from one core recovered in the Adélie Trough. A good correspondence between the d 13 C org record and records of small/large and pennate/centric ratios in many of the core segments indicates that diatom species composition affected Holocene d 13 C org variations, possibly via diatom shape and size effects. Variations in the surface water CO 2 concentration and in the isotopic composition of the source during the Holocene cannot be ruled out although they cannot explain rapid and large-amplitude d 13 C org changes. Within the limit of our investigation, our results argue against active carbon acquisition through a carbon concentration mechanism as evidenced in low-latitude upwelling systems. The bulk organic matter thus represents a mixing of diatom taxa having different fractionation affinity to aqueous CO 2. Our results confirm previous evidence which demonstrates that d 13 C org down-core records should be used with great caution to reconstruct past CO 2 content in surface waters. |
author2 |
Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-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) Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) 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) |
format |
Article in Journal/Newspaper |
author |
Crosta, X. Crespin, J. Billy, I. Ther, O. |
author_facet |
Crosta, X. Crespin, J. Billy, I. Ther, O. |
author_sort |
Crosta, X. |
title |
Major factors controlling Holocene δ 13 C org changes in a seasonal sea-ice environment, Adélie Land, East Antarctica |
title_short |
Major factors controlling Holocene δ 13 C org changes in a seasonal sea-ice environment, Adélie Land, East Antarctica |
title_full |
Major factors controlling Holocene δ 13 C org changes in a seasonal sea-ice environment, Adélie Land, East Antarctica |
title_fullStr |
Major factors controlling Holocene δ 13 C org changes in a seasonal sea-ice environment, Adélie Land, East Antarctica |
title_full_unstemmed |
Major factors controlling Holocene δ 13 C org changes in a seasonal sea-ice environment, Adélie Land, East Antarctica |
title_sort |
major factors controlling holocene δ 13 c org changes in a seasonal sea-ice environment, adélie land, east antarctica |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal.archives-ouvertes.fr/hal-02105693 https://hal.archives-ouvertes.fr/hal-02105693/document https://hal.archives-ouvertes.fr/hal-02105693/file/Crosta_GBC2005b.pdf https://doi.org/10.1029/2004GB002426 |
long_lat |
ENVELOPE(136.000,136.000,-65.500,-65.500) |
geographic |
Adélie Trough East Antarctica |
geographic_facet |
Adélie Trough East Antarctica |
genre |
Antarc* Antarctica East Antarctica Sea ice |
genre_facet |
Antarc* Antarctica East Antarctica Sea ice |
op_source |
ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.archives-ouvertes.fr/hal-02105693 Global Biogeochemical Cycles, American Geophysical Union, 2005, 19 (4), pp.GB4029. ⟨10.1029/2004GB002426⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2004GB002426 hal-02105693 https://hal.archives-ouvertes.fr/hal-02105693 https://hal.archives-ouvertes.fr/hal-02105693/document https://hal.archives-ouvertes.fr/hal-02105693/file/Crosta_GBC2005b.pdf doi:10.1029/2004GB002426 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2004GB002426 |
container_title |
Global Biogeochemical Cycles |
container_volume |
19 |
container_issue |
4 |
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1766273473160675328 |