Mg/Ca thermometry in planktic foraminifera: Improving paleotemperature estimations for G. bulloides and N. pachyderma left
Planktic foraminiferal Mg/Ca ratios have become a fundamental seawater temperature proxy in past climate reconstructions, due to the temperature dependence of Mg uptake into foraminiferal calcite. However, empirical calibrations for single species from methodologically consistent data are still lack...
Published in: | Geochemistry, Geophysics, Geosystems |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Amer Geophysical Union
2016
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Online Access: | https://archimer.ifremer.fr/doc/00324/43480/42916.pdf https://archimer.ifremer.fr/doc/00324/43480/42917.docx https://archimer.ifremer.fr/doc/00324/43480/42918.xls https://archimer.ifremer.fr/doc/00324/43480/42919.xls https://doi.org/10.1002/2015GC006234 https://archimer.ifremer.fr/doc/00324/43480/ |
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ftarchimer:oai:archimer.ifremer.fr:43480 2023-05-15T17:14:59+02:00 Mg/Ca thermometry in planktic foraminifera: Improving paleotemperature estimations for G. bulloides and N. pachyderma left Riveiros, Natalia Vazquez Govin, Aline Waelbroeck, Claire Mackensen, Andreas Michel, Elisabeth Moreira, Santiago Bouinot, Thomas Caillon, Nicolas Orgun, Ayche Brandon, Margaux 2016-04 application/pdf https://archimer.ifremer.fr/doc/00324/43480/42916.pdf https://archimer.ifremer.fr/doc/00324/43480/42917.docx https://archimer.ifremer.fr/doc/00324/43480/42918.xls https://archimer.ifremer.fr/doc/00324/43480/42919.xls https://doi.org/10.1002/2015GC006234 https://archimer.ifremer.fr/doc/00324/43480/ eng eng Amer Geophysical Union info:eu-repo/grantAgreement/EC/FP7/339108/EU//ACCLIMATE https://archimer.ifremer.fr/doc/00324/43480/42916.pdf https://archimer.ifremer.fr/doc/00324/43480/42917.docx https://archimer.ifremer.fr/doc/00324/43480/42918.xls https://archimer.ifremer.fr/doc/00324/43480/42919.xls doi:10.1002/2015GC006234 https://archimer.ifremer.fr/doc/00324/43480/ 2016. American Geophysical Union. All Rights Reserved. info:eu-repo/semantics/openAccess restricted use Geochemistry Geophysics Geosystems (1525-2027) (Amer Geophysical Union), 2016-04 , Vol. 17 , N. 4 , P. 1249-1264 text Publication info:eu-repo/semantics/article 2016 ftarchimer https://doi.org/10.1002/2015GC006234 2021-09-23T20:27:54Z Planktic foraminiferal Mg/Ca ratios have become a fundamental seawater temperature proxy in past climate reconstructions, due to the temperature dependence of Mg uptake into foraminiferal calcite. However, empirical calibrations for single species from methodologically consistent data are still lacking. Here we present species-specific calibrations of Mg/Ca versus calcification temperature for two commonly used species of planktic foraminifera: Globigerina bulloides and Neogloboquadrina pachyderma left, based on a series of Southern Ocean and North Atlantic core tops. Combining these new data with previously published data, we derive an integrated G. bulloides Mg/Ca-temperature calibration for mid and high latitudes of both hemispheres between 2 and 18°C, where Mg/Ca = 1.006 ± 0.032 * e0.065 ± 0.003*Tiso (R2 = 0.82). G. bulloides is found to calcify deeper in the Southern Ocean (∼ 200 m) than in the North Atlantic (top 50 m). We also propose a Mg/Ca temperature calibration to describe the temperature response in N. pachyderma left that calcified away from the influence of sea ice in the Southern Ocean, valid between ∼ −1 and 9°C, of the form Mg/Ca = 0.580 ± 0.016 * e0.084 ± 0.006*Tiso (R2 = 0.70). These calibrations account for uncertainties on Mg/Ca measurements and calcification temperature that were carefully estimated and propagated using Monte Carlo iterations. The 1σ propagated error in Mg/Ca-derived temperatures is 1.1°C for G. bulloides and 0.9°C for N. pachyderma left for the presented data sets. Geographical extension of genotypes must be assessed when choosing to develop regional or global calibrations. Article in Journal/Newspaper Neogloboquadrina pachyderma North Atlantic Sea ice Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Southern Ocean Geochemistry, Geophysics, Geosystems 17 4 1249 1264 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
Planktic foraminiferal Mg/Ca ratios have become a fundamental seawater temperature proxy in past climate reconstructions, due to the temperature dependence of Mg uptake into foraminiferal calcite. However, empirical calibrations for single species from methodologically consistent data are still lacking. Here we present species-specific calibrations of Mg/Ca versus calcification temperature for two commonly used species of planktic foraminifera: Globigerina bulloides and Neogloboquadrina pachyderma left, based on a series of Southern Ocean and North Atlantic core tops. Combining these new data with previously published data, we derive an integrated G. bulloides Mg/Ca-temperature calibration for mid and high latitudes of both hemispheres between 2 and 18°C, where Mg/Ca = 1.006 ± 0.032 * e0.065 ± 0.003*Tiso (R2 = 0.82). G. bulloides is found to calcify deeper in the Southern Ocean (∼ 200 m) than in the North Atlantic (top 50 m). We also propose a Mg/Ca temperature calibration to describe the temperature response in N. pachyderma left that calcified away from the influence of sea ice in the Southern Ocean, valid between ∼ −1 and 9°C, of the form Mg/Ca = 0.580 ± 0.016 * e0.084 ± 0.006*Tiso (R2 = 0.70). These calibrations account for uncertainties on Mg/Ca measurements and calcification temperature that were carefully estimated and propagated using Monte Carlo iterations. The 1σ propagated error in Mg/Ca-derived temperatures is 1.1°C for G. bulloides and 0.9°C for N. pachyderma left for the presented data sets. Geographical extension of genotypes must be assessed when choosing to develop regional or global calibrations. |
format |
Article in Journal/Newspaper |
author |
Riveiros, Natalia Vazquez Govin, Aline Waelbroeck, Claire Mackensen, Andreas Michel, Elisabeth Moreira, Santiago Bouinot, Thomas Caillon, Nicolas Orgun, Ayche Brandon, Margaux |
spellingShingle |
Riveiros, Natalia Vazquez Govin, Aline Waelbroeck, Claire Mackensen, Andreas Michel, Elisabeth Moreira, Santiago Bouinot, Thomas Caillon, Nicolas Orgun, Ayche Brandon, Margaux Mg/Ca thermometry in planktic foraminifera: Improving paleotemperature estimations for G. bulloides and N. pachyderma left |
author_facet |
Riveiros, Natalia Vazquez Govin, Aline Waelbroeck, Claire Mackensen, Andreas Michel, Elisabeth Moreira, Santiago Bouinot, Thomas Caillon, Nicolas Orgun, Ayche Brandon, Margaux |
author_sort |
Riveiros, Natalia Vazquez |
title |
Mg/Ca thermometry in planktic foraminifera: Improving paleotemperature estimations for G. bulloides and N. pachyderma left |
title_short |
Mg/Ca thermometry in planktic foraminifera: Improving paleotemperature estimations for G. bulloides and N. pachyderma left |
title_full |
Mg/Ca thermometry in planktic foraminifera: Improving paleotemperature estimations for G. bulloides and N. pachyderma left |
title_fullStr |
Mg/Ca thermometry in planktic foraminifera: Improving paleotemperature estimations for G. bulloides and N. pachyderma left |
title_full_unstemmed |
Mg/Ca thermometry in planktic foraminifera: Improving paleotemperature estimations for G. bulloides and N. pachyderma left |
title_sort |
mg/ca thermometry in planktic foraminifera: improving paleotemperature estimations for g. bulloides and n. pachyderma left |
publisher |
Amer Geophysical Union |
publishDate |
2016 |
url |
https://archimer.ifremer.fr/doc/00324/43480/42916.pdf https://archimer.ifremer.fr/doc/00324/43480/42917.docx https://archimer.ifremer.fr/doc/00324/43480/42918.xls https://archimer.ifremer.fr/doc/00324/43480/42919.xls https://doi.org/10.1002/2015GC006234 https://archimer.ifremer.fr/doc/00324/43480/ |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Neogloboquadrina pachyderma North Atlantic Sea ice Southern Ocean |
genre_facet |
Neogloboquadrina pachyderma North Atlantic Sea ice Southern Ocean |
op_source |
Geochemistry Geophysics Geosystems (1525-2027) (Amer Geophysical Union), 2016-04 , Vol. 17 , N. 4 , P. 1249-1264 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/339108/EU//ACCLIMATE https://archimer.ifremer.fr/doc/00324/43480/42916.pdf https://archimer.ifremer.fr/doc/00324/43480/42917.docx https://archimer.ifremer.fr/doc/00324/43480/42918.xls https://archimer.ifremer.fr/doc/00324/43480/42919.xls doi:10.1002/2015GC006234 https://archimer.ifremer.fr/doc/00324/43480/ |
op_rights |
2016. American Geophysical Union. All Rights Reserved. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1002/2015GC006234 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
17 |
container_issue |
4 |
container_start_page |
1249 |
op_container_end_page |
1264 |
_version_ |
1766073104131424256 |