Penultimate deglacial warming across the Mediterranean Sea revealed by clumped isotopes in foraminifera
The variability of seawater temperature through time is a critical measure of climate change, yet its reconstruction remains problematic in many regions. Mg/Ca and oxygen isotope (δ18OC) measurements in foraminiferal carbonate shells can be combined to reconstruct seawater temperature and δ18O (δ18O...
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ftunivvigo:oai:www.investigo.biblioteca.uvigo.es:11093/6299 2024-05-19T07:45:10+00:00 Penultimate deglacial warming across the Mediterranean Sea revealed by clumped isotopes in foraminifera Rodríguez Sanz, Laura Bernasconi, Stefano M Marino , Gianluca Heslop, David Müller, Iñigo A Fernández, Alvaro Grant, Katharine M. Rohling, Eelco J. 2017-11-29 http://hdl.handle.net/11093/6299 https://doi.org/10.1038/s41598-017-16528-6 https://www.nature.com/articles/s41598-017-16528-6 eng eng Scientific Reports Xeociencias mariñas e ordenación do territorio Xeoloxía Mariña e Ambiental Scientific Reports, 7(1): 1-11 (2017) 20452322 http://hdl.handle.net/11093/6299 doi:10.1038/s41598-017-16528-6 https://www.nature.com/articles/s41598-017-16528-6 Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ openAccess 2503.08 Isótopos Estables 2502.05 Paleoclimatología article 2017 ftunivvigo https://doi.org/10.1038/s41598-017-16528-6 2024-04-21T23:42:44Z The variability of seawater temperature through time is a critical measure of climate change, yet its reconstruction remains problematic in many regions. Mg/Ca and oxygen isotope (δ18OC) measurements in foraminiferal carbonate shells can be combined to reconstruct seawater temperature and δ18O (δ18OSW). The latter is a measure of changes in local hydrology (e.g., precipitation/evaporation, freshwater inputs) and global ice volume. But diagenetic processes may affect foraminiferal Mg/Ca. This restricts its potential in many places, including the Mediterranean Sea, a strategic region for deciphering global climate and sea-level changes. High alkalinity/salinity conditions especially bias Mg/Ca temperatures in the eastern Mediterranean (eMed). Here we advance the understanding of both western Mediterranean (wMed) and eMed hydrographic variability through the penultimate glacial termination (TII) and last interglacial, by applying the clumped isotope (Δ47) paleothermometer to planktic foraminifera with a novel data-processing approach. Results suggest that North Atlantic cooling during Heinrich stadial 11 (HS11) affected surface-water temperatures much more in the wMed (during winter/spring) than in the eMed (during summer). The method’s paired Δ47 and δ18OC data also portray δ18OSW. These records reveal a clear HS11 freshwater signal, which attenuated toward the eMed, and also that last interglacial surface warming in the eMed was strongly amplified by water-column stratification during the deposition of the organic-rich (sapropel) interval known as S5. Article in Journal/Newspaper North Atlantic University of Vigo: Investigo (Repositorio Institucional de la Universidade de Vigo) Scientific Reports 7 1 |
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University of Vigo: Investigo (Repositorio Institucional de la Universidade de Vigo) |
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ftunivvigo |
language |
English |
topic |
2503.08 Isótopos Estables 2502.05 Paleoclimatología |
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2503.08 Isótopos Estables 2502.05 Paleoclimatología Rodríguez Sanz, Laura Bernasconi, Stefano M Marino , Gianluca Heslop, David Müller, Iñigo A Fernández, Alvaro Grant, Katharine M. Rohling, Eelco J. Penultimate deglacial warming across the Mediterranean Sea revealed by clumped isotopes in foraminifera |
topic_facet |
2503.08 Isótopos Estables 2502.05 Paleoclimatología |
description |
The variability of seawater temperature through time is a critical measure of climate change, yet its reconstruction remains problematic in many regions. Mg/Ca and oxygen isotope (δ18OC) measurements in foraminiferal carbonate shells can be combined to reconstruct seawater temperature and δ18O (δ18OSW). The latter is a measure of changes in local hydrology (e.g., precipitation/evaporation, freshwater inputs) and global ice volume. But diagenetic processes may affect foraminiferal Mg/Ca. This restricts its potential in many places, including the Mediterranean Sea, a strategic region for deciphering global climate and sea-level changes. High alkalinity/salinity conditions especially bias Mg/Ca temperatures in the eastern Mediterranean (eMed). Here we advance the understanding of both western Mediterranean (wMed) and eMed hydrographic variability through the penultimate glacial termination (TII) and last interglacial, by applying the clumped isotope (Δ47) paleothermometer to planktic foraminifera with a novel data-processing approach. Results suggest that North Atlantic cooling during Heinrich stadial 11 (HS11) affected surface-water temperatures much more in the wMed (during winter/spring) than in the eMed (during summer). The method’s paired Δ47 and δ18OC data also portray δ18OSW. These records reveal a clear HS11 freshwater signal, which attenuated toward the eMed, and also that last interglacial surface warming in the eMed was strongly amplified by water-column stratification during the deposition of the organic-rich (sapropel) interval known as S5. |
format |
Article in Journal/Newspaper |
author |
Rodríguez Sanz, Laura Bernasconi, Stefano M Marino , Gianluca Heslop, David Müller, Iñigo A Fernández, Alvaro Grant, Katharine M. Rohling, Eelco J. |
author_facet |
Rodríguez Sanz, Laura Bernasconi, Stefano M Marino , Gianluca Heslop, David Müller, Iñigo A Fernández, Alvaro Grant, Katharine M. Rohling, Eelco J. |
author_sort |
Rodríguez Sanz, Laura |
title |
Penultimate deglacial warming across the Mediterranean Sea revealed by clumped isotopes in foraminifera |
title_short |
Penultimate deglacial warming across the Mediterranean Sea revealed by clumped isotopes in foraminifera |
title_full |
Penultimate deglacial warming across the Mediterranean Sea revealed by clumped isotopes in foraminifera |
title_fullStr |
Penultimate deglacial warming across the Mediterranean Sea revealed by clumped isotopes in foraminifera |
title_full_unstemmed |
Penultimate deglacial warming across the Mediterranean Sea revealed by clumped isotopes in foraminifera |
title_sort |
penultimate deglacial warming across the mediterranean sea revealed by clumped isotopes in foraminifera |
publisher |
Scientific Reports |
publishDate |
2017 |
url |
http://hdl.handle.net/11093/6299 https://doi.org/10.1038/s41598-017-16528-6 https://www.nature.com/articles/s41598-017-16528-6 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Scientific Reports, 7(1): 1-11 (2017) 20452322 http://hdl.handle.net/11093/6299 doi:10.1038/s41598-017-16528-6 https://www.nature.com/articles/s41598-017-16528-6 |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ openAccess |
op_doi |
https://doi.org/10.1038/s41598-017-16528-6 |
container_title |
Scientific Reports |
container_volume |
7 |
container_issue |
1 |
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1799485137834999808 |