Increased nutrient supply to the Southern Ocean during the Holocene and its implications for the pre-industrial atmospheric CO2 rise
A rise in the atmospheric CO2 concentration of ~20 parts per million over the course of the Holocene has long been recognized as exceptional among interglacials and is in need of explanation. Previous hypotheses involved natural or anthropogenic changes in terrestrial biomass, carbonate compensation...
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ftunivbern:oai:boris.unibe.ch:120243 2023-08-20T04:08:08+02:00 Increased nutrient supply to the Southern Ocean during the Holocene and its implications for the pre-industrial atmospheric CO2 rise Studer, Anja S. Sigman, Daniel M. Martinez-Garcia, Alfredo Thöle, Lena Michel, Elisabeth Jaccard, Samuel Lippold, Jörg Mazaud, Alain Wang, Xingchen T. Robinson, Laura F. Adkins, Jess F. Haug, Gerald H. 2018-07 application/pdf https://boris.unibe.ch/120243/1/Studer%20et%20al.,%2018.pdf https://boris.unibe.ch/120243/ eng eng Nature Publishing Group https://boris.unibe.ch/120243/ info:eu-repo/semantics/restrictedAccess Studer, Anja S.; Sigman, Daniel M.; Martinez-Garcia, Alfredo; Thöle, Lena; Michel, Elisabeth; Jaccard, Samuel; Lippold, Jörg; Mazaud, Alain; Wang, Xingchen T.; Robinson, Laura F.; Adkins, Jess F.; Haug, Gerald H. (2018). Increased nutrient supply to the Southern Ocean during the Holocene and its implications for the pre-industrial atmospheric CO2 rise. Nature geoscience, 11(10), pp. 756-760. Nature Publishing Group 10.1038/s41561-018-0191-8 <http://dx.doi.org/10.1038/s41561-018-0191-8> 550 Earth sciences & geology info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2018 ftunivbern https://doi.org/10.1038/s41561-018-0191-8 2023-07-31T21:46:29Z A rise in the atmospheric CO2 concentration of ~20 parts per million over the course of the Holocene has long been recognized as exceptional among interglacials and is in need of explanation. Previous hypotheses involved natural or anthropogenic changes in terrestrial biomass, carbonate compensation in response to deglacial outgassing of oceanic CO2, and enhanced shallow water carbonate deposition. Here, we compile new and previously published fossil-bound nitrogen isotope records from the Southern Ocean that indicate a rise in surface nitrate concentration through the Holocene. When coupled with increasing or constant export production, these data suggest an acceleration of nitrate supply to the Southern Ocean surface from underlying deep water. This change would have weakened the ocean’s biological pump that stores CO2 in the ocean interior, possibly explaining the Holocene atmospheric CO2 rise. Over the Holocene, the circum-North Atlantic region cooled, and the formation of North Atlantic Deep Water appears to have slowed. Thus, the ‘seesaw’ in deep ocean ventilation between the North Atlantic and the Southern Ocean that has been invoked for millennial-scale events, deglaciations and the last interglacial period may have also operated, albeit in a more gradual form, over the Holocene. Article in Journal/Newspaper North Atlantic Deep Water North Atlantic Southern Ocean BORIS (Bern Open Repository and Information System, University of Bern) Southern Ocean Nature Geoscience 11 10 756 760 |
institution |
Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
topic |
550 Earth sciences & geology |
spellingShingle |
550 Earth sciences & geology Studer, Anja S. Sigman, Daniel M. Martinez-Garcia, Alfredo Thöle, Lena Michel, Elisabeth Jaccard, Samuel Lippold, Jörg Mazaud, Alain Wang, Xingchen T. Robinson, Laura F. Adkins, Jess F. Haug, Gerald H. Increased nutrient supply to the Southern Ocean during the Holocene and its implications for the pre-industrial atmospheric CO2 rise |
topic_facet |
550 Earth sciences & geology |
description |
A rise in the atmospheric CO2 concentration of ~20 parts per million over the course of the Holocene has long been recognized as exceptional among interglacials and is in need of explanation. Previous hypotheses involved natural or anthropogenic changes in terrestrial biomass, carbonate compensation in response to deglacial outgassing of oceanic CO2, and enhanced shallow water carbonate deposition. Here, we compile new and previously published fossil-bound nitrogen isotope records from the Southern Ocean that indicate a rise in surface nitrate concentration through the Holocene. When coupled with increasing or constant export production, these data suggest an acceleration of nitrate supply to the Southern Ocean surface from underlying deep water. This change would have weakened the ocean’s biological pump that stores CO2 in the ocean interior, possibly explaining the Holocene atmospheric CO2 rise. Over the Holocene, the circum-North Atlantic region cooled, and the formation of North Atlantic Deep Water appears to have slowed. Thus, the ‘seesaw’ in deep ocean ventilation between the North Atlantic and the Southern Ocean that has been invoked for millennial-scale events, deglaciations and the last interglacial period may have also operated, albeit in a more gradual form, over the Holocene. |
format |
Article in Journal/Newspaper |
author |
Studer, Anja S. Sigman, Daniel M. Martinez-Garcia, Alfredo Thöle, Lena Michel, Elisabeth Jaccard, Samuel Lippold, Jörg Mazaud, Alain Wang, Xingchen T. Robinson, Laura F. Adkins, Jess F. Haug, Gerald H. |
author_facet |
Studer, Anja S. Sigman, Daniel M. Martinez-Garcia, Alfredo Thöle, Lena Michel, Elisabeth Jaccard, Samuel Lippold, Jörg Mazaud, Alain Wang, Xingchen T. Robinson, Laura F. Adkins, Jess F. Haug, Gerald H. |
author_sort |
Studer, Anja S. |
title |
Increased nutrient supply to the Southern Ocean during the Holocene and its implications for the pre-industrial atmospheric CO2 rise |
title_short |
Increased nutrient supply to the Southern Ocean during the Holocene and its implications for the pre-industrial atmospheric CO2 rise |
title_full |
Increased nutrient supply to the Southern Ocean during the Holocene and its implications for the pre-industrial atmospheric CO2 rise |
title_fullStr |
Increased nutrient supply to the Southern Ocean during the Holocene and its implications for the pre-industrial atmospheric CO2 rise |
title_full_unstemmed |
Increased nutrient supply to the Southern Ocean during the Holocene and its implications for the pre-industrial atmospheric CO2 rise |
title_sort |
increased nutrient supply to the southern ocean during the holocene and its implications for the pre-industrial atmospheric co2 rise |
publisher |
Nature Publishing Group |
publishDate |
2018 |
url |
https://boris.unibe.ch/120243/1/Studer%20et%20al.,%2018.pdf https://boris.unibe.ch/120243/ |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
North Atlantic Deep Water North Atlantic Southern Ocean |
genre_facet |
North Atlantic Deep Water North Atlantic Southern Ocean |
op_source |
Studer, Anja S.; Sigman, Daniel M.; Martinez-Garcia, Alfredo; Thöle, Lena; Michel, Elisabeth; Jaccard, Samuel; Lippold, Jörg; Mazaud, Alain; Wang, Xingchen T.; Robinson, Laura F.; Adkins, Jess F.; Haug, Gerald H. (2018). Increased nutrient supply to the Southern Ocean during the Holocene and its implications for the pre-industrial atmospheric CO2 rise. Nature geoscience, 11(10), pp. 756-760. Nature Publishing Group 10.1038/s41561-018-0191-8 <http://dx.doi.org/10.1038/s41561-018-0191-8> |
op_relation |
https://boris.unibe.ch/120243/ |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1038/s41561-018-0191-8 |
container_title |
Nature Geoscience |
container_volume |
11 |
container_issue |
10 |
container_start_page |
756 |
op_container_end_page |
760 |
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1774720230860259328 |