Calibration of the boron isotope proxy in the planktonic foraminifera Globigerinoides ruber for use in palaeo-CO2 reconstruction
The boron isotope-pH proxy, applied to mixed-layer planktic foraminifera, has great potential for estimating past CO2 levels, which in turn is crucial to advance our understanding of how this greenhouse gas influences Earth's climate. Previous culture experiments have shown that, although the b...
Published in: | Earth and Planetary Science Letters |
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Main Authors: | , , , , , , , , , , , |
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Language: | English |
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Online Access: | https://hdl.handle.net/1983/4d5b00c8-fe42-4fc6-995a-2db955305277 https://research-information.bris.ac.uk/en/publications/4d5b00c8-fe42-4fc6-995a-2db955305277 https://doi.org/10.1016/j.epsl.2012.12.029 |
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ftubristolcris:oai:research-information.bris.ac.uk:publications/4d5b00c8-fe42-4fc6-995a-2db955305277 2024-02-11T10:08:03+01:00 Calibration of the boron isotope proxy in the planktonic foraminifera Globigerinoides ruber for use in palaeo-CO2 reconstruction Henehan, Michael J. Rae, James W. B. Foster, Gavin L. Erez, Jonathan Prentice, Katherine C. Kucera, Michal Bostock, Helen C. Martinez-Boti, Miguel A. Milton, J. Andy Wilson, Paul A. Marshall, Brittney J. Elliott, Tim 2013-02-15 https://hdl.handle.net/1983/4d5b00c8-fe42-4fc6-995a-2db955305277 https://research-information.bris.ac.uk/en/publications/4d5b00c8-fe42-4fc6-995a-2db955305277 https://doi.org/10.1016/j.epsl.2012.12.029 eng eng info:eu-repo/semantics/restrictedAccess Henehan , M J , Rae , J W B , Foster , G L , Erez , J , Prentice , K C , Kucera , M , Bostock , H C , Martinez-Boti , M A , Milton , J A , Wilson , P A , Marshall , B J & Elliott , T 2013 , ' Calibration of the boron isotope proxy in the planktonic foraminifera Globigerinoides ruber for use in palaeo-CO2 reconstruction ' , Earth and Planetary Science Letters , vol. 364 , pp. 111-122 . https://doi.org/10.1016/j.epsl.2012.12.029 pCO(2) reconstruction culture calibration SACCULIFER BRADY ORBULINA-UNIVERSA BORIC-ACID CARBON-DIOXIDE CONCENTRATION MARINE CARBONATES boron isotopes MOLECULAR-ORBITAL CALCULATIONS ARABIAN SEA PH PROXY PALEO-PH MC-ICPMS Globigerinoides ruber planktic foraminifera SCLERACTINIAN CORALS article 2013 ftubristolcris https://doi.org/10.1016/j.epsl.2012.12.029 2024-01-25T23:29:53Z The boron isotope-pH proxy, applied to mixed-layer planktic foraminifera, has great potential for estimating past CO2 levels, which in turn is crucial to advance our understanding of how this greenhouse gas influences Earth's climate. Previous culture experiments have shown that, although the boron isotopic compositions of various planktic foraminifera are pH dependent, they do not agree with the aqueous geochemical basis of the proxy. Here we outline the results of culture experiments on Globigerinoides ruber (white) across a range of pH (similar to 7.5-8.2) and analysed via multicollector inductively-coupled plasma mass spectrometry (MC-ICPMS), and compare these data to core-top and sediment-trap samples to derive a robust new species-specific boron isotope-pH calibration. Consistent with earlier culture studies, we show a reduced pH dependency of the boron isotopic composition of symbiont-bearing planktonic foraminifera compared to borate ion in seawater. We also present evidence for a size fraction effect in the delta B-11 of G. ruber. Finally, we reconstruct atmospheric CO2 concentrations over the last deglacial using our new calibration at two equatorial sites, ODP Site 999A and Site GeoB1523-1. These data provide further grounding for the application of the boron isotope-pH proxy in reconstructions of past atmospheric CO2 levels. (C) 2012 Elsevier B.V. All rights reserved. Article in Journal/Newspaper Planktonic foraminifera University of Bristol: Bristol Research Earth and Planetary Science Letters 364 111 122 |
institution |
Open Polar |
collection |
University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
topic |
pCO(2) reconstruction culture calibration SACCULIFER BRADY ORBULINA-UNIVERSA BORIC-ACID CARBON-DIOXIDE CONCENTRATION MARINE CARBONATES boron isotopes MOLECULAR-ORBITAL CALCULATIONS ARABIAN SEA PH PROXY PALEO-PH MC-ICPMS Globigerinoides ruber planktic foraminifera SCLERACTINIAN CORALS |
spellingShingle |
pCO(2) reconstruction culture calibration SACCULIFER BRADY ORBULINA-UNIVERSA BORIC-ACID CARBON-DIOXIDE CONCENTRATION MARINE CARBONATES boron isotopes MOLECULAR-ORBITAL CALCULATIONS ARABIAN SEA PH PROXY PALEO-PH MC-ICPMS Globigerinoides ruber planktic foraminifera SCLERACTINIAN CORALS Henehan, Michael J. Rae, James W. B. Foster, Gavin L. Erez, Jonathan Prentice, Katherine C. Kucera, Michal Bostock, Helen C. Martinez-Boti, Miguel A. Milton, J. Andy Wilson, Paul A. Marshall, Brittney J. Elliott, Tim Calibration of the boron isotope proxy in the planktonic foraminifera Globigerinoides ruber for use in palaeo-CO2 reconstruction |
topic_facet |
pCO(2) reconstruction culture calibration SACCULIFER BRADY ORBULINA-UNIVERSA BORIC-ACID CARBON-DIOXIDE CONCENTRATION MARINE CARBONATES boron isotopes MOLECULAR-ORBITAL CALCULATIONS ARABIAN SEA PH PROXY PALEO-PH MC-ICPMS Globigerinoides ruber planktic foraminifera SCLERACTINIAN CORALS |
description |
The boron isotope-pH proxy, applied to mixed-layer planktic foraminifera, has great potential for estimating past CO2 levels, which in turn is crucial to advance our understanding of how this greenhouse gas influences Earth's climate. Previous culture experiments have shown that, although the boron isotopic compositions of various planktic foraminifera are pH dependent, they do not agree with the aqueous geochemical basis of the proxy. Here we outline the results of culture experiments on Globigerinoides ruber (white) across a range of pH (similar to 7.5-8.2) and analysed via multicollector inductively-coupled plasma mass spectrometry (MC-ICPMS), and compare these data to core-top and sediment-trap samples to derive a robust new species-specific boron isotope-pH calibration. Consistent with earlier culture studies, we show a reduced pH dependency of the boron isotopic composition of symbiont-bearing planktonic foraminifera compared to borate ion in seawater. We also present evidence for a size fraction effect in the delta B-11 of G. ruber. Finally, we reconstruct atmospheric CO2 concentrations over the last deglacial using our new calibration at two equatorial sites, ODP Site 999A and Site GeoB1523-1. These data provide further grounding for the application of the boron isotope-pH proxy in reconstructions of past atmospheric CO2 levels. (C) 2012 Elsevier B.V. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Henehan, Michael J. Rae, James W. B. Foster, Gavin L. Erez, Jonathan Prentice, Katherine C. Kucera, Michal Bostock, Helen C. Martinez-Boti, Miguel A. Milton, J. Andy Wilson, Paul A. Marshall, Brittney J. Elliott, Tim |
author_facet |
Henehan, Michael J. Rae, James W. B. Foster, Gavin L. Erez, Jonathan Prentice, Katherine C. Kucera, Michal Bostock, Helen C. Martinez-Boti, Miguel A. Milton, J. Andy Wilson, Paul A. Marshall, Brittney J. Elliott, Tim |
author_sort |
Henehan, Michael J. |
title |
Calibration of the boron isotope proxy in the planktonic foraminifera Globigerinoides ruber for use in palaeo-CO2 reconstruction |
title_short |
Calibration of the boron isotope proxy in the planktonic foraminifera Globigerinoides ruber for use in palaeo-CO2 reconstruction |
title_full |
Calibration of the boron isotope proxy in the planktonic foraminifera Globigerinoides ruber for use in palaeo-CO2 reconstruction |
title_fullStr |
Calibration of the boron isotope proxy in the planktonic foraminifera Globigerinoides ruber for use in palaeo-CO2 reconstruction |
title_full_unstemmed |
Calibration of the boron isotope proxy in the planktonic foraminifera Globigerinoides ruber for use in palaeo-CO2 reconstruction |
title_sort |
calibration of the boron isotope proxy in the planktonic foraminifera globigerinoides ruber for use in palaeo-co2 reconstruction |
publishDate |
2013 |
url |
https://hdl.handle.net/1983/4d5b00c8-fe42-4fc6-995a-2db955305277 https://research-information.bris.ac.uk/en/publications/4d5b00c8-fe42-4fc6-995a-2db955305277 https://doi.org/10.1016/j.epsl.2012.12.029 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Henehan , M J , Rae , J W B , Foster , G L , Erez , J , Prentice , K C , Kucera , M , Bostock , H C , Martinez-Boti , M A , Milton , J A , Wilson , P A , Marshall , B J & Elliott , T 2013 , ' Calibration of the boron isotope proxy in the planktonic foraminifera Globigerinoides ruber for use in palaeo-CO2 reconstruction ' , Earth and Planetary Science Letters , vol. 364 , pp. 111-122 . https://doi.org/10.1016/j.epsl.2012.12.029 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.epsl.2012.12.029 |
container_title |
Earth and Planetary Science Letters |
container_volume |
364 |
container_start_page |
111 |
op_container_end_page |
122 |
_version_ |
1790606971247788032 |