Decoupled carbonate chemistry controls on the incorporation of boron into Orbulina universa
International audience In order to fully constrain paleo-carbonate systems, proxies for two out of seven parameters, plus temperature and salinity, are required. The boron isotopic composition (δ11B) of planktonic foraminifera shells is a powerful tool for reconstructing changes in past surface ocea...
Published in: | Biogeosciences |
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Main Authors: | , , , , , , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2017
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Online Access: | https://hal.sorbonne-universite.fr/hal-01501470 https://hal.sorbonne-universite.fr/hal-01501470/document https://hal.sorbonne-universite.fr/hal-01501470/file/bg-14-415-2017.pdf https://doi.org/10.5194/bg-14-415-2017 |
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ftsciencespohal |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy Howes, Ella L. Kaczmarek, Karina Raitzsch, Markus Mewes, Antje Bijma, Nienke Horn, Ingo Misra, Sambuddha Gattuso, Jean-Pierre Bijma, Jelle Decoupled carbonate chemistry controls on the incorporation of boron into Orbulina universa |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy |
description |
International audience In order to fully constrain paleo-carbonate systems, proxies for two out of seven parameters, plus temperature and salinity, are required. The boron isotopic composition (δ11B) of planktonic foraminifera shells is a powerful tool for reconstructing changes in past surface ocean pH. As B(OH)4− is substituted into the biogenic calcite lattice in place of CO3 2−, and both borate and carbonate ions are more abundant at higher pH, it was suggested early on that B ∕ Ca ratios in biogenic calcite may serve as a proxy for [CO3 2−]. Although several recent studies have shown that a direct connection of B ∕ Ca to carbonate system parameters may be masked by other environmental factors in the field, there is ample evidence for a mechanistic relationship between B ∕ Ca and carbonate system parameters. Here, we focus on investigating the primary relationship to develop a mechanistic understanding of boron uptake. Differentiating between the effects of pH and [CO3 2−] is problematic, as they co-vary closely in natural systems, so the major control on boron incorporation remains unclear. To deconvolve the effects of pH and [CO3 2−] and to investigate their impact on the B ∕ Ca ratio and δ11B, we conducted culture experiments with the planktonic foraminifer Orbulina universa in manipulated culture media: constant pH (8.05), but changing [CO3 2−] (238, 286 and 534 µmol kg−1 CO3 2−) and at constant [CO3 2−] (276 ± 19.5 µmol kg−1) and varying pH (7.7, 7.9 and 8.05). Measurements of the isotopic composition of boron and the B ∕ Ca ratio were performed simultaneously using a femtosecond laser ablation system coupled to a MC-ICP-MS (multiple-collector inductively coupled plasma mass spectrometer). Our results show that, as expected, δ11B is controlled by pH but it is also modulated by [CO3 2−]. On the other hand, the B ∕ Ca ratio is driven by [HCO3−], independently of pH. This suggests that B ∕ Ca ratios in foraminiferal calcite can possibly be used as a second, independent, proxy for complete paleo-carbonate ... |
author2 |
Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 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 Center for Marine Environmental Sciences Bremen (MARUM) Universität Bremen Christian-Albrechts-Universität zu Kiel = Christian-Albrechts University of Kiel = Université Christian-Albrechts de Kiel (CAU) Leibniz Universität Hannover=Leibniz University Hannover University of Cambridge UK (CAM) Laboratoire d'océanographie de Villefranche (LOV) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Sciences Po (Sciences Po) |
format |
Article in Journal/Newspaper |
author |
Howes, Ella L. Kaczmarek, Karina Raitzsch, Markus Mewes, Antje Bijma, Nienke Horn, Ingo Misra, Sambuddha Gattuso, Jean-Pierre Bijma, Jelle |
author_facet |
Howes, Ella L. Kaczmarek, Karina Raitzsch, Markus Mewes, Antje Bijma, Nienke Horn, Ingo Misra, Sambuddha Gattuso, Jean-Pierre Bijma, Jelle |
author_sort |
Howes, Ella L. |
title |
Decoupled carbonate chemistry controls on the incorporation of boron into Orbulina universa |
title_short |
Decoupled carbonate chemistry controls on the incorporation of boron into Orbulina universa |
title_full |
Decoupled carbonate chemistry controls on the incorporation of boron into Orbulina universa |
title_fullStr |
Decoupled carbonate chemistry controls on the incorporation of boron into Orbulina universa |
title_full_unstemmed |
Decoupled carbonate chemistry controls on the incorporation of boron into Orbulina universa |
title_sort |
decoupled carbonate chemistry controls on the incorporation of boron into orbulina universa |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.sorbonne-universite.fr/hal-01501470 https://hal.sorbonne-universite.fr/hal-01501470/document https://hal.sorbonne-universite.fr/hal-01501470/file/bg-14-415-2017.pdf https://doi.org/10.5194/bg-14-415-2017 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.sorbonne-universite.fr/hal-01501470 Biogeosciences, 2017, 14 (2), pp.415-430. ⟨10.5194/bg-14-415-2017⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-14-415-2017 hal-01501470 https://hal.sorbonne-universite.fr/hal-01501470 https://hal.sorbonne-universite.fr/hal-01501470/document https://hal.sorbonne-universite.fr/hal-01501470/file/bg-14-415-2017.pdf doi:10.5194/bg-14-415-2017 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-14-415-2017 |
container_title |
Biogeosciences |
container_volume |
14 |
container_issue |
2 |
container_start_page |
415 |
op_container_end_page |
430 |
_version_ |
1802649300776255488 |
spelling |
ftsciencespohal:oai:HAL:hal-01501470v1 2024-06-23T07:56:18+00:00 Decoupled carbonate chemistry controls on the incorporation of boron into Orbulina universa Howes, Ella L. Kaczmarek, Karina Raitzsch, Markus Mewes, Antje Bijma, Nienke Horn, Ingo Misra, Sambuddha Gattuso, Jean-Pierre Bijma, Jelle Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 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 Center for Marine Environmental Sciences Bremen (MARUM) Universität Bremen Christian-Albrechts-Universität zu Kiel = Christian-Albrechts University of Kiel = Université Christian-Albrechts de Kiel (CAU) Leibniz Universität Hannover=Leibniz University Hannover University of Cambridge UK (CAM) Laboratoire d'océanographie de Villefranche (LOV) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Sciences Po (Sciences Po) 2017 https://hal.sorbonne-universite.fr/hal-01501470 https://hal.sorbonne-universite.fr/hal-01501470/document https://hal.sorbonne-universite.fr/hal-01501470/file/bg-14-415-2017.pdf https://doi.org/10.5194/bg-14-415-2017 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-14-415-2017 hal-01501470 https://hal.sorbonne-universite.fr/hal-01501470 https://hal.sorbonne-universite.fr/hal-01501470/document https://hal.sorbonne-universite.fr/hal-01501470/file/bg-14-415-2017.pdf doi:10.5194/bg-14-415-2017 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.sorbonne-universite.fr/hal-01501470 Biogeosciences, 2017, 14 (2), pp.415-430. ⟨10.5194/bg-14-415-2017⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy info:eu-repo/semantics/article Journal articles 2017 ftsciencespohal https://doi.org/10.5194/bg-14-415-2017 2024-06-06T23:33:44Z International audience In order to fully constrain paleo-carbonate systems, proxies for two out of seven parameters, plus temperature and salinity, are required. The boron isotopic composition (δ11B) of planktonic foraminifera shells is a powerful tool for reconstructing changes in past surface ocean pH. As B(OH)4− is substituted into the biogenic calcite lattice in place of CO3 2−, and both borate and carbonate ions are more abundant at higher pH, it was suggested early on that B ∕ Ca ratios in biogenic calcite may serve as a proxy for [CO3 2−]. Although several recent studies have shown that a direct connection of B ∕ Ca to carbonate system parameters may be masked by other environmental factors in the field, there is ample evidence for a mechanistic relationship between B ∕ Ca and carbonate system parameters. Here, we focus on investigating the primary relationship to develop a mechanistic understanding of boron uptake. Differentiating between the effects of pH and [CO3 2−] is problematic, as they co-vary closely in natural systems, so the major control on boron incorporation remains unclear. To deconvolve the effects of pH and [CO3 2−] and to investigate their impact on the B ∕ Ca ratio and δ11B, we conducted culture experiments with the planktonic foraminifer Orbulina universa in manipulated culture media: constant pH (8.05), but changing [CO3 2−] (238, 286 and 534 µmol kg−1 CO3 2−) and at constant [CO3 2−] (276 ± 19.5 µmol kg−1) and varying pH (7.7, 7.9 and 8.05). Measurements of the isotopic composition of boron and the B ∕ Ca ratio were performed simultaneously using a femtosecond laser ablation system coupled to a MC-ICP-MS (multiple-collector inductively coupled plasma mass spectrometer). Our results show that, as expected, δ11B is controlled by pH but it is also modulated by [CO3 2−]. On the other hand, the B ∕ Ca ratio is driven by [HCO3−], independently of pH. This suggests that B ∕ Ca ratios in foraminiferal calcite can possibly be used as a second, independent, proxy for complete paleo-carbonate ... Article in Journal/Newspaper Planktonic foraminifera SPIRE (Sciences Po Institutional Repository) Biogeosciences 14 2 415 430 |