Carbon isotope offsets between benthic foraminifer species of the genus Cibicides ( Cibicidoides ) in the glacial sub-Antarctic Atlantic
International audience Epibenthic foraminifer δ 13 C measurements are valuable for reconstructing past bottom water dissolved inorganic carbon δ 13 C (δ 13 C DIC), which are used to infer global ocean circulation patterns. Epibenthic δ 13 C, however, may also reflect the influence of 13 C-depleted p...
Published in: | Paleoceanography |
---|---|
Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2016
|
Subjects: | |
Online Access: | https://hal.science/hal-02915965 https://hal.science/hal-02915965/document https://hal.science/hal-02915965/file/2016PA003029.pdf https://doi.org/10.1002/2016PA003029 |
id |
ftinsu:oai:HAL:hal-02915965v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Gottschalk, Julia Vázquez Riveiros, Natalia Waelbroeck, Claire Skinner, Luke C. Michel, Elisabeth Duplessy, Jean-Claude Hodell, David A. Mackensen, Andreas Carbon isotope offsets between benthic foraminifer species of the genus Cibicides ( Cibicidoides ) in the glacial sub-Antarctic Atlantic |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Epibenthic foraminifer δ 13 C measurements are valuable for reconstructing past bottom water dissolved inorganic carbon δ 13 C (δ 13 C DIC), which are used to infer global ocean circulation patterns. Epibenthic δ 13 C, however, may also reflect the influence of 13 C-depleted phytodetritus, microhabitat changes, and/or variations in carbonate ion concentrations. Here we compare the δ 13 C of two benthic foraminifer species, Cibicides kullenbergi and Cibicides wuellerstorfi, and their morphotypes, in three sub-Antarctic Atlantic sediment cores over several glacial-interglacial transitions. These species are commonly assumed to be epibenthic, living above or directly below the sediment-water interface. While this might be consistent with the small δ 13 C offset that we observe between these species during late Pleistocene interglacial periods (Δδ 13 C=−0.19±0.31‰, N=63), it is more difficult to reconcile with the significant δ 13 C offset that is found between these species during glacial periods (Δδ 13 C=−0.76±0.44‰, N=44). We test possible scenarios by analyzing Uvigerina spp. δ 13 C and benthic foraminifer abundances: (1) C. kullenbergi δ 13 C is biased to light values either due to microhabitat shifts or phytodetritus effects and (2) C. wuellerstorfi δ 13 C is biased to heavy values, relative to long-term average conditions, for instance by recording the sporadic occurrence of less depleted deepwater δ 13 C DIC. Neither of these scenarios can be ruled out unequivocally. However, our findings emphasize that supposedly epibenthic foraminifer δ 13 C in the sub-Antarctic Atlantic may reflect several factors rather than being solely a function of bottom water δ 13 C DIC. This could have a direct bearing on the interpretation of extremely light South Atlantic δ 13 C values at the Last Glacial Maximum. |
author2 |
Institute of Geological Sciences Bern Universität Bern / University of Bern (UNIBE) 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) Paléocéanographie (PALEOCEAN) 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)) University of Cambridge UK (CAM) Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association European Project: 339108,EC:FP7:ERC,ERC-2013-ADG,ACCLIMATE(2014) |
format |
Article in Journal/Newspaper |
author |
Gottschalk, Julia Vázquez Riveiros, Natalia Waelbroeck, Claire Skinner, Luke C. Michel, Elisabeth Duplessy, Jean-Claude Hodell, David A. Mackensen, Andreas |
author_facet |
Gottschalk, Julia Vázquez Riveiros, Natalia Waelbroeck, Claire Skinner, Luke C. Michel, Elisabeth Duplessy, Jean-Claude Hodell, David A. Mackensen, Andreas |
author_sort |
Gottschalk, Julia |
title |
Carbon isotope offsets between benthic foraminifer species of the genus Cibicides ( Cibicidoides ) in the glacial sub-Antarctic Atlantic |
title_short |
Carbon isotope offsets between benthic foraminifer species of the genus Cibicides ( Cibicidoides ) in the glacial sub-Antarctic Atlantic |
title_full |
Carbon isotope offsets between benthic foraminifer species of the genus Cibicides ( Cibicidoides ) in the glacial sub-Antarctic Atlantic |
title_fullStr |
Carbon isotope offsets between benthic foraminifer species of the genus Cibicides ( Cibicidoides ) in the glacial sub-Antarctic Atlantic |
title_full_unstemmed |
Carbon isotope offsets between benthic foraminifer species of the genus Cibicides ( Cibicidoides ) in the glacial sub-Antarctic Atlantic |
title_sort |
carbon isotope offsets between benthic foraminifer species of the genus cibicides ( cibicidoides ) in the glacial sub-antarctic atlantic |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.science/hal-02915965 https://hal.science/hal-02915965/document https://hal.science/hal-02915965/file/2016PA003029.pdf https://doi.org/10.1002/2016PA003029 |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 0883-8305 Paleoceanography https://hal.science/hal-02915965 Paleoceanography, 2016, 31 (12), pp.1583-1602. ⟨10.1002/2016PA003029⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2016PA003029 info:eu-repo/grantAgreement/EC/FP7/339108/EU/Elucidating the Causes and Effects of Atlantic Circulation Changes through Model-Data Integration/ACCLIMATE hal-02915965 https://hal.science/hal-02915965 https://hal.science/hal-02915965/document https://hal.science/hal-02915965/file/2016PA003029.pdf doi:10.1002/2016PA003029 WOS: 000393173000005 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/2016PA003029 |
container_title |
Paleoceanography |
container_volume |
31 |
container_issue |
12 |
container_start_page |
1583 |
op_container_end_page |
1602 |
_version_ |
1797567842685550592 |
spelling |
ftinsu:oai:HAL:hal-02915965v1 2024-04-28T07:58:09+00:00 Carbon isotope offsets between benthic foraminifer species of the genus Cibicides ( Cibicidoides ) in the glacial sub-Antarctic Atlantic Gottschalk, Julia Vázquez Riveiros, Natalia Waelbroeck, Claire Skinner, Luke C. Michel, Elisabeth Duplessy, Jean-Claude Hodell, David A. Mackensen, Andreas Institute of Geological Sciences Bern Universität Bern / University of Bern (UNIBE) 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) Paléocéanographie (PALEOCEAN) 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)) University of Cambridge UK (CAM) Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association European Project: 339108,EC:FP7:ERC,ERC-2013-ADG,ACCLIMATE(2014) 2016 https://hal.science/hal-02915965 https://hal.science/hal-02915965/document https://hal.science/hal-02915965/file/2016PA003029.pdf https://doi.org/10.1002/2016PA003029 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1002/2016PA003029 info:eu-repo/grantAgreement/EC/FP7/339108/EU/Elucidating the Causes and Effects of Atlantic Circulation Changes through Model-Data Integration/ACCLIMATE hal-02915965 https://hal.science/hal-02915965 https://hal.science/hal-02915965/document https://hal.science/hal-02915965/file/2016PA003029.pdf doi:10.1002/2016PA003029 WOS: 000393173000005 info:eu-repo/semantics/OpenAccess ISSN: 0883-8305 Paleoceanography https://hal.science/hal-02915965 Paleoceanography, 2016, 31 (12), pp.1583-1602. ⟨10.1002/2016PA003029⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2016 ftinsu https://doi.org/10.1002/2016PA003029 2024-04-05T00:40:57Z International audience Epibenthic foraminifer δ 13 C measurements are valuable for reconstructing past bottom water dissolved inorganic carbon δ 13 C (δ 13 C DIC), which are used to infer global ocean circulation patterns. Epibenthic δ 13 C, however, may also reflect the influence of 13 C-depleted phytodetritus, microhabitat changes, and/or variations in carbonate ion concentrations. Here we compare the δ 13 C of two benthic foraminifer species, Cibicides kullenbergi and Cibicides wuellerstorfi, and their morphotypes, in three sub-Antarctic Atlantic sediment cores over several glacial-interglacial transitions. These species are commonly assumed to be epibenthic, living above or directly below the sediment-water interface. While this might be consistent with the small δ 13 C offset that we observe between these species during late Pleistocene interglacial periods (Δδ 13 C=−0.19±0.31‰, N=63), it is more difficult to reconcile with the significant δ 13 C offset that is found between these species during glacial periods (Δδ 13 C=−0.76±0.44‰, N=44). We test possible scenarios by analyzing Uvigerina spp. δ 13 C and benthic foraminifer abundances: (1) C. kullenbergi δ 13 C is biased to light values either due to microhabitat shifts or phytodetritus effects and (2) C. wuellerstorfi δ 13 C is biased to heavy values, relative to long-term average conditions, for instance by recording the sporadic occurrence of less depleted deepwater δ 13 C DIC. Neither of these scenarios can be ruled out unequivocally. However, our findings emphasize that supposedly epibenthic foraminifer δ 13 C in the sub-Antarctic Atlantic may reflect several factors rather than being solely a function of bottom water δ 13 C DIC. This could have a direct bearing on the interpretation of extremely light South Atlantic δ 13 C values at the Last Glacial Maximum. Article in Journal/Newspaper Antarc* Antarctic Institut national des sciences de l'Univers: HAL-INSU Paleoceanography 31 12 1583 1602 |