Calibration of the carbon isotope composition (δ13C) of benthic foraminifera
The carbon isotope composition (δ13C) of seawater provides valuable insight on ocean circulation, air-sea exchange, the biological pump, and the global carbon cycle and is reflected by the δ13C of foraminifera tests. Here more than 1700 δ13C observations of the benthic foraminifera genus Cibicides f...
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ftdatacite:10.7892/boris.101178 2023-05-15T13:34:39+02:00 Calibration of the carbon isotope composition (δ13C) of benthic foraminifera Filipsson, Helena L. Hoogakker, Babette Herguera, Juan Carlos Sikes, Elisabeth L. Cartapanis, Olivier Curry, William B. Lynch-Stieglitz, Jean Waelbroeck, Claire Schmittner, Andreas Oppo, Delia W. Mackensen, Andreas Spero, Howard J. Lund, David C. Jaccard, Samuel Gottschalk, Julia Michel, Elisabeth Galbraith, Eric D. Bostock, Helen C. Repschläger, Janne Martinez-Mendez, Gema Mix, Alan C. Lisiecki, Lorraine E. Peterson, Carlye D. 2017 application/pdf https://dx.doi.org/10.7892/boris.101178 https://boris.unibe.ch/101178/ en eng American Geophysical Union info:eu-repo/semantics/openAccess 550 Earth sciences & geology Text article-journal ScholarlyArticle 2017 ftdatacite https://doi.org/10.7892/boris.101178 2021-11-05T12:55:41Z The carbon isotope composition (δ13C) of seawater provides valuable insight on ocean circulation, air-sea exchange, the biological pump, and the global carbon cycle and is reflected by the δ13C of foraminifera tests. Here more than 1700 δ13C observations of the benthic foraminifera genus Cibicides from late Holocene sediments (δ13CCibnat) are compiled and compared with newly updated estimates of the natural (preindustrial) water column δ13C of dissolved inorganic carbon (δ13CDICnat) as part of the international Ocean Circulation and Carbon Cycling (OC3) project. Using selection criteria based on the spatial distance between samples, we find high correlation between δ13CCibnat and δ13CDICnat, confirming earlier work. Regression analyses indicate significant carbonate ion (−2.6 ± 0.4) × 10−3‰/(μmol kg−1) [CO32−] and pressure (−4.9 ± 1.7) × 10−5‰ m−1 (depth) effects, which we use to propose a new global calibration for predicting δ13CDICnat from δ13CCibnat. This calibration is shown to remove some systematic regional biases and decrease errors compared with the one-to-one relationship (δ13CDICnat = δ13CCibnat). However, these effects and the error reductions are relatively small, which suggests that most conclusions from previous studies using a one-to-one relationship remain robust. The remaining standard error of the regression is generally σ ≅ 0.25‰, with larger values found in the southeast Atlantic and Antarctic (σ ≅ 0.4‰) and for species other than Cibicides wuellerstorfi. Discussion of species effects and possible sources of the remaining errors may aid future attempts to improve the use of the benthic δ13C record. Text Antarc* Antarctic DataCite Metadata Store (German National Library of Science and Technology) Antarctic |
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DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
English |
topic |
550 Earth sciences & geology |
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550 Earth sciences & geology Filipsson, Helena L. Hoogakker, Babette Herguera, Juan Carlos Sikes, Elisabeth L. Cartapanis, Olivier Curry, William B. Lynch-Stieglitz, Jean Waelbroeck, Claire Schmittner, Andreas Oppo, Delia W. Mackensen, Andreas Spero, Howard J. Lund, David C. Jaccard, Samuel Gottschalk, Julia Michel, Elisabeth Galbraith, Eric D. Bostock, Helen C. Repschläger, Janne Martinez-Mendez, Gema Mix, Alan C. Lisiecki, Lorraine E. Peterson, Carlye D. Calibration of the carbon isotope composition (δ13C) of benthic foraminifera |
topic_facet |
550 Earth sciences & geology |
description |
The carbon isotope composition (δ13C) of seawater provides valuable insight on ocean circulation, air-sea exchange, the biological pump, and the global carbon cycle and is reflected by the δ13C of foraminifera tests. Here more than 1700 δ13C observations of the benthic foraminifera genus Cibicides from late Holocene sediments (δ13CCibnat) are compiled and compared with newly updated estimates of the natural (preindustrial) water column δ13C of dissolved inorganic carbon (δ13CDICnat) as part of the international Ocean Circulation and Carbon Cycling (OC3) project. Using selection criteria based on the spatial distance between samples, we find high correlation between δ13CCibnat and δ13CDICnat, confirming earlier work. Regression analyses indicate significant carbonate ion (−2.6 ± 0.4) × 10−3‰/(μmol kg−1) [CO32−] and pressure (−4.9 ± 1.7) × 10−5‰ m−1 (depth) effects, which we use to propose a new global calibration for predicting δ13CDICnat from δ13CCibnat. This calibration is shown to remove some systematic regional biases and decrease errors compared with the one-to-one relationship (δ13CDICnat = δ13CCibnat). However, these effects and the error reductions are relatively small, which suggests that most conclusions from previous studies using a one-to-one relationship remain robust. The remaining standard error of the regression is generally σ ≅ 0.25‰, with larger values found in the southeast Atlantic and Antarctic (σ ≅ 0.4‰) and for species other than Cibicides wuellerstorfi. Discussion of species effects and possible sources of the remaining errors may aid future attempts to improve the use of the benthic δ13C record. |
format |
Text |
author |
Filipsson, Helena L. Hoogakker, Babette Herguera, Juan Carlos Sikes, Elisabeth L. Cartapanis, Olivier Curry, William B. Lynch-Stieglitz, Jean Waelbroeck, Claire Schmittner, Andreas Oppo, Delia W. Mackensen, Andreas Spero, Howard J. Lund, David C. Jaccard, Samuel Gottschalk, Julia Michel, Elisabeth Galbraith, Eric D. Bostock, Helen C. Repschläger, Janne Martinez-Mendez, Gema Mix, Alan C. Lisiecki, Lorraine E. Peterson, Carlye D. |
author_facet |
Filipsson, Helena L. Hoogakker, Babette Herguera, Juan Carlos Sikes, Elisabeth L. Cartapanis, Olivier Curry, William B. Lynch-Stieglitz, Jean Waelbroeck, Claire Schmittner, Andreas Oppo, Delia W. Mackensen, Andreas Spero, Howard J. Lund, David C. Jaccard, Samuel Gottschalk, Julia Michel, Elisabeth Galbraith, Eric D. Bostock, Helen C. Repschläger, Janne Martinez-Mendez, Gema Mix, Alan C. Lisiecki, Lorraine E. Peterson, Carlye D. |
author_sort |
Filipsson, Helena L. |
title |
Calibration of the carbon isotope composition (δ13C) of benthic foraminifera |
title_short |
Calibration of the carbon isotope composition (δ13C) of benthic foraminifera |
title_full |
Calibration of the carbon isotope composition (δ13C) of benthic foraminifera |
title_fullStr |
Calibration of the carbon isotope composition (δ13C) of benthic foraminifera |
title_full_unstemmed |
Calibration of the carbon isotope composition (δ13C) of benthic foraminifera |
title_sort |
calibration of the carbon isotope composition (δ13c) of benthic foraminifera |
publisher |
American Geophysical Union |
publishDate |
2017 |
url |
https://dx.doi.org/10.7892/boris.101178 https://boris.unibe.ch/101178/ |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.7892/boris.101178 |
_version_ |
1766055041217593344 |