A core-top study of dissolution effect on B/Ca in Globigerinoides sacculifer from the tropical Atlantic : potential bias for paleo-reconstruction of seawater carbonate chemistry
It has been recently shown that B/Ca in planktonic foraminiferal calcite can be used as a proxy for seawater pH. Based on the study of surface sediments (multi-cores) retrieved along a depth transect on the Sierra Leone Rise (Eastern Equatorial Atlantic), we document the decrease of B/Ca and Mg/Ca o...
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ftird:oai:ird.fr:fdi:010060367 2024-09-15T18:31:04+00:00 A core-top study of dissolution effect on B/Ca in Globigerinoides sacculifer from the tropical Atlantic : potential bias for paleo-reconstruction of seawater carbonate chemistry Coadic, R. Bassinot, F. Douville, E. Michel, E. /Dissard, Delphine Greaves, M. OCEAN ATLANTIQUE ZONE TROPICALE 2013 https://www.documentation.ird.fr/hor/fdi:010060367 EN eng https://www.documentation.ird.fr/hor/fdi:010060367 oai:ird.fr:fdi:010060367 Coadic R., Bassinot F., Douville E., Michel E., Dissard Delphine, Greaves M. A core-top study of dissolution effect on B/Ca in Globigerinoides sacculifer from the tropical Atlantic : potential bias for paleo-reconstruction of seawater carbonate chemistry. 2013, 14 (4), p. 1053-1068 B/Ca planktonic foraminifera dissolution Atlantic Ocean text 2013 ftird 2024-08-15T05:57:42Z It has been recently shown that B/Ca in planktonic foraminiferal calcite can be used as a proxy for seawater pH. Based on the study of surface sediments (multi-cores) retrieved along a depth transect on the Sierra Leone Rise (Eastern Equatorial Atlantic), we document the decrease of B/Ca and Mg/Ca of Globigerinoides sacculifer shells with increasing water depth and dissolution. This effect of dissolution on B/Ca may potentially represent a severe bias for paleo-pH reconstructions using this species. Samples of G. sacculifer were analyzed independently at two laboratories for B/Ca and Mg/Ca. Both sets of results show a systematic decrease of B/Ca and Mg/Ca along the depth transect, with an overall loss of similar to 14 mu mol/mol (similar to 15%) for B/Ca and of similar to 0.7mmol/mol (similar to 21%) for Mg/Ca between the shallowest (2640m) and the deepest (4950m) sites. Because of this dissolution effect, surface water pH reconstructed from B/Ca of G. sacculifer decreases by similar to 0.11 units between the shallowest site and the deepest site, a magnitude similar to the expected glacial/interglacial surface water pH changes. Text Planktonic foraminifera IRD (Institute de recherche pour le développement): Horizon |
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Open Polar |
collection |
IRD (Institute de recherche pour le développement): Horizon |
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language |
English |
topic |
B/Ca planktonic foraminifera dissolution Atlantic Ocean |
spellingShingle |
B/Ca planktonic foraminifera dissolution Atlantic Ocean Coadic, R. Bassinot, F. Douville, E. Michel, E. /Dissard, Delphine Greaves, M. A core-top study of dissolution effect on B/Ca in Globigerinoides sacculifer from the tropical Atlantic : potential bias for paleo-reconstruction of seawater carbonate chemistry |
topic_facet |
B/Ca planktonic foraminifera dissolution Atlantic Ocean |
description |
It has been recently shown that B/Ca in planktonic foraminiferal calcite can be used as a proxy for seawater pH. Based on the study of surface sediments (multi-cores) retrieved along a depth transect on the Sierra Leone Rise (Eastern Equatorial Atlantic), we document the decrease of B/Ca and Mg/Ca of Globigerinoides sacculifer shells with increasing water depth and dissolution. This effect of dissolution on B/Ca may potentially represent a severe bias for paleo-pH reconstructions using this species. Samples of G. sacculifer were analyzed independently at two laboratories for B/Ca and Mg/Ca. Both sets of results show a systematic decrease of B/Ca and Mg/Ca along the depth transect, with an overall loss of similar to 14 mu mol/mol (similar to 15%) for B/Ca and of similar to 0.7mmol/mol (similar to 21%) for Mg/Ca between the shallowest (2640m) and the deepest (4950m) sites. Because of this dissolution effect, surface water pH reconstructed from B/Ca of G. sacculifer decreases by similar to 0.11 units between the shallowest site and the deepest site, a magnitude similar to the expected glacial/interglacial surface water pH changes. |
format |
Text |
author |
Coadic, R. Bassinot, F. Douville, E. Michel, E. /Dissard, Delphine Greaves, M. |
author_facet |
Coadic, R. Bassinot, F. Douville, E. Michel, E. /Dissard, Delphine Greaves, M. |
author_sort |
Coadic, R. |
title |
A core-top study of dissolution effect on B/Ca in Globigerinoides sacculifer from the tropical Atlantic : potential bias for paleo-reconstruction of seawater carbonate chemistry |
title_short |
A core-top study of dissolution effect on B/Ca in Globigerinoides sacculifer from the tropical Atlantic : potential bias for paleo-reconstruction of seawater carbonate chemistry |
title_full |
A core-top study of dissolution effect on B/Ca in Globigerinoides sacculifer from the tropical Atlantic : potential bias for paleo-reconstruction of seawater carbonate chemistry |
title_fullStr |
A core-top study of dissolution effect on B/Ca in Globigerinoides sacculifer from the tropical Atlantic : potential bias for paleo-reconstruction of seawater carbonate chemistry |
title_full_unstemmed |
A core-top study of dissolution effect on B/Ca in Globigerinoides sacculifer from the tropical Atlantic : potential bias for paleo-reconstruction of seawater carbonate chemistry |
title_sort |
core-top study of dissolution effect on b/ca in globigerinoides sacculifer from the tropical atlantic : potential bias for paleo-reconstruction of seawater carbonate chemistry |
publishDate |
2013 |
url |
https://www.documentation.ird.fr/hor/fdi:010060367 |
op_coverage |
OCEAN ATLANTIQUE ZONE TROPICALE |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
https://www.documentation.ird.fr/hor/fdi:010060367 oai:ird.fr:fdi:010060367 Coadic R., Bassinot F., Douville E., Michel E., Dissard Delphine, Greaves M. A core-top study of dissolution effect on B/Ca in Globigerinoides sacculifer from the tropical Atlantic : potential bias for paleo-reconstruction of seawater carbonate chemistry. 2013, 14 (4), p. 1053-1068 |
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1810472664206147584 |