Glacial heterogeneity in Southern Ocean carbon storage abated by fast South Indian deglacial carbon release
Past changes in ocean 14C disequilibria have been suggested to reflect the Southern Ocean control on global exogenic carbon cycling. Yet, the volumetric extent of the glacial carbon pool and the deglacial mechanisms contributing to release remineralized carbon, particularly from regions with enhance...
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ftdatacite:10.48350/149081 2023-05-15T18:24:31+02:00 Glacial heterogeneity in Southern Ocean carbon storage abated by fast South Indian deglacial carbon release Gottschalk, Julia Michel, Elisabeth Thöle, Lena M. Studer, Anja S. Hasenfratz, Adam P. Schmid, Nicole Butzin, Martin Mazaud, Alain Martínez-García, Alfredo Szidat, Sönke Jaccard, Samuel L. 2020 https://dx.doi.org/10.48350/149081 https://boris.unibe.ch/149081/ unknown Springer Nature open access Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 http://purl.org/coar/access_right/c_abf2 CC-BY 540 Chemistry 550 Earth sciences & geology Text article-journal journal article ScholarlyArticle 2020 ftdatacite https://doi.org/10.48350/149081 2021-11-05T12:55:41Z Past changes in ocean 14C disequilibria have been suggested to reflect the Southern Ocean control on global exogenic carbon cycling. Yet, the volumetric extent of the glacial carbon pool and the deglacial mechanisms contributing to release remineralized carbon, particularly from regions with enhanced mixing today, remain insufficiently constrained. Here, we reconstruct the deglacial ventilation history of the South Indian upwelling hotspot near Kerguelen Island, using high-resolution 14C-dating of smaller-than-conventional foraminiferal samples and multi-proxy deep-ocean oxygen estimates. We find marked regional differences in Southern Ocean overturning with distinct South Indian fingerprints on (early de-)glacial atmospheric CO2 change. The dissipation of this heterogeneity commenced 14.6 kyr ago, signaling the onset of modern-like, strong South Indian Ocean upwelling, likely promoted by rejuvenated Atlantic overturning. Our findings highlight the South Indian Ocean’s capacity to influence atmospheric CO2 levels and amplify the impacts of inter-hemispheric climate variability on global carbon cycling within centuries and millennia. Text Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Indian Kerguelen Kerguelen Island ENVELOPE(69.500,69.500,-49.250,-49.250) Southern Ocean |
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DataCite Metadata Store (German National Library of Science and Technology) |
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topic |
540 Chemistry 550 Earth sciences & geology |
spellingShingle |
540 Chemistry 550 Earth sciences & geology Gottschalk, Julia Michel, Elisabeth Thöle, Lena M. Studer, Anja S. Hasenfratz, Adam P. Schmid, Nicole Butzin, Martin Mazaud, Alain Martínez-García, Alfredo Szidat, Sönke Jaccard, Samuel L. Glacial heterogeneity in Southern Ocean carbon storage abated by fast South Indian deglacial carbon release |
topic_facet |
540 Chemistry 550 Earth sciences & geology |
description |
Past changes in ocean 14C disequilibria have been suggested to reflect the Southern Ocean control on global exogenic carbon cycling. Yet, the volumetric extent of the glacial carbon pool and the deglacial mechanisms contributing to release remineralized carbon, particularly from regions with enhanced mixing today, remain insufficiently constrained. Here, we reconstruct the deglacial ventilation history of the South Indian upwelling hotspot near Kerguelen Island, using high-resolution 14C-dating of smaller-than-conventional foraminiferal samples and multi-proxy deep-ocean oxygen estimates. We find marked regional differences in Southern Ocean overturning with distinct South Indian fingerprints on (early de-)glacial atmospheric CO2 change. The dissipation of this heterogeneity commenced 14.6 kyr ago, signaling the onset of modern-like, strong South Indian Ocean upwelling, likely promoted by rejuvenated Atlantic overturning. Our findings highlight the South Indian Ocean’s capacity to influence atmospheric CO2 levels and amplify the impacts of inter-hemispheric climate variability on global carbon cycling within centuries and millennia. |
format |
Text |
author |
Gottschalk, Julia Michel, Elisabeth Thöle, Lena M. Studer, Anja S. Hasenfratz, Adam P. Schmid, Nicole Butzin, Martin Mazaud, Alain Martínez-García, Alfredo Szidat, Sönke Jaccard, Samuel L. |
author_facet |
Gottschalk, Julia Michel, Elisabeth Thöle, Lena M. Studer, Anja S. Hasenfratz, Adam P. Schmid, Nicole Butzin, Martin Mazaud, Alain Martínez-García, Alfredo Szidat, Sönke Jaccard, Samuel L. |
author_sort |
Gottschalk, Julia |
title |
Glacial heterogeneity in Southern Ocean carbon storage abated by fast South Indian deglacial carbon release |
title_short |
Glacial heterogeneity in Southern Ocean carbon storage abated by fast South Indian deglacial carbon release |
title_full |
Glacial heterogeneity in Southern Ocean carbon storage abated by fast South Indian deglacial carbon release |
title_fullStr |
Glacial heterogeneity in Southern Ocean carbon storage abated by fast South Indian deglacial carbon release |
title_full_unstemmed |
Glacial heterogeneity in Southern Ocean carbon storage abated by fast South Indian deglacial carbon release |
title_sort |
glacial heterogeneity in southern ocean carbon storage abated by fast south indian deglacial carbon release |
publisher |
Springer Nature |
publishDate |
2020 |
url |
https://dx.doi.org/10.48350/149081 https://boris.unibe.ch/149081/ |
long_lat |
ENVELOPE(69.500,69.500,-49.250,-49.250) |
geographic |
Indian Kerguelen Kerguelen Island Southern Ocean |
geographic_facet |
Indian Kerguelen Kerguelen Island Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_rights |
open access Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 http://purl.org/coar/access_right/c_abf2 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.48350/149081 |
_version_ |
1766205134155546624 |