Radiocarbon and oxygen ventilation in the deep South Indian Ocean during the last deglaciation ...
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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Online Access: | https://dx.doi.org/10.1594/pangaea.912711 https://doi.pangaea.de/10.1594/PANGAEA.912711 |
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ftdatacite:10.1594/pangaea.912711 2024-03-31T07:55:26+00:00 Radiocarbon and oxygen ventilation in the deep South Indian Ocean during the last deglaciation ... Gottschalk, Julia Michel, Elisabeth Thöle, Lena M Studer, Anja S Hasenfratz, Adam P Schmid, Nicole Mazaud, Alain Martínez-García, Alfredo Szidat, Sönke Jaccard, Samuel L 2020 application/zip https://dx.doi.org/10.1594/pangaea.912711 https://doi.pangaea.de/10.1594/PANGAEA.912711 en eng PANGAEA https://dx.doi.org/10.1038/s41467-020-20034-1 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 Deglaciation ocean circulation radiocarbon Termination ventilation article Publication Series of Datasets Collection 2020 ftdatacite https://doi.org/10.1594/pangaea.91271110.1038/s41467-020-20034-1 2024-03-04T14:06:53Z 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 ... Article in Journal/Newspaper 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 |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Deglaciation ocean circulation radiocarbon Termination ventilation |
spellingShingle |
Deglaciation ocean circulation radiocarbon Termination ventilation Gottschalk, Julia Michel, Elisabeth Thöle, Lena M Studer, Anja S Hasenfratz, Adam P Schmid, Nicole Mazaud, Alain Martínez-García, Alfredo Szidat, Sönke Jaccard, Samuel L Radiocarbon and oxygen ventilation in the deep South Indian Ocean during the last deglaciation ... |
topic_facet |
Deglaciation ocean circulation radiocarbon Termination ventilation |
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 ... |
format |
Article in Journal/Newspaper |
author |
Gottschalk, Julia Michel, Elisabeth Thöle, Lena M Studer, Anja S Hasenfratz, Adam P Schmid, Nicole 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 Mazaud, Alain Martínez-García, Alfredo Szidat, Sönke Jaccard, Samuel L |
author_sort |
Gottschalk, Julia |
title |
Radiocarbon and oxygen ventilation in the deep South Indian Ocean during the last deglaciation ... |
title_short |
Radiocarbon and oxygen ventilation in the deep South Indian Ocean during the last deglaciation ... |
title_full |
Radiocarbon and oxygen ventilation in the deep South Indian Ocean during the last deglaciation ... |
title_fullStr |
Radiocarbon and oxygen ventilation in the deep South Indian Ocean during the last deglaciation ... |
title_full_unstemmed |
Radiocarbon and oxygen ventilation in the deep South Indian Ocean during the last deglaciation ... |
title_sort |
radiocarbon and oxygen ventilation in the deep south indian ocean during the last deglaciation ... |
publisher |
PANGAEA |
publishDate |
2020 |
url |
https://dx.doi.org/10.1594/pangaea.912711 https://doi.pangaea.de/10.1594/PANGAEA.912711 |
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_relation |
https://dx.doi.org/10.1038/s41467-020-20034-1 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_doi |
https://doi.org/10.1594/pangaea.91271110.1038/s41467-020-20034-1 |
_version_ |
1795037296042442752 |