Carbon isotopes characterize rapid changes in atmospheric carbon dioxide during the last deglaciation
An understanding of the mechanisms that control CO2 change during glacial–interglacial cycles remains elusive. Here we help to constrain changing sources with a high-precision, high-resolution deglacial record of the stable isotopic composition of carbon in CO2 (δ13C-CO2) in air extracted from ice s...
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:38232 2023-05-15T13:56:54+02:00 Carbon isotopes characterize rapid changes in atmospheric carbon dioxide during the last deglaciation Bauska, Thomas K. Baggenstos, Daniel Brook, Edward J. Mix, Alan C. Marcott, Shaun A. Petrenko, Vasilii V. Schaefer, Hinrich Severinghaus, Jeffrey P. Lee, James E. 2016-03-29 https://nrl.northumbria.ac.uk/id/eprint/38232/ https://doi.org/10.1073/pnas.1513868113 unknown National Academy of Sciences Bauska, Thomas K., Baggenstos, Daniel, Brook, Edward J., Mix, Alan C., Marcott, Shaun A., Petrenko, Vasilii V., Schaefer, Hinrich, Severinghaus, Jeffrey P. and Lee, James E. (2016) Carbon isotopes characterize rapid changes in atmospheric carbon dioxide during the last deglaciation. Proceedings of the National Academy of Sciences, 113 (13). pp. 3465-3470. ISSN 0027-8424 F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 2016 ftunivnorthumb https://doi.org/10.1073/pnas.1513868113 2022-09-25T06:09:19Z An understanding of the mechanisms that control CO2 change during glacial–interglacial cycles remains elusive. Here we help to constrain changing sources with a high-precision, high-resolution deglacial record of the stable isotopic composition of carbon in CO2 (δ13C-CO2) in air extracted from ice samples from Taylor Glacier, Antarctica. During the initial rise in atmospheric CO2 from 17.6 to 15.5 ka, these data demarcate a decrease in δ13C-CO2, likely due to a weakened oceanic biological pump. From 15.5 to 11.5 ka, the continued atmospheric CO2 rise of 40 ppm is associated with small changes in δ13C-CO2, consistent with a nearly equal contribution from a further weakening of the biological pump and rising ocean temperature. These two trends, related to marine sources, are punctuated at 16.3 and 12.9 ka with abrupt, century-scale perturbations in δ13C-CO2 that suggest rapid oxidation of organic land carbon or enhanced air–sea gas exchange in the Southern Ocean. Additional century-scale increases in atmospheric CO2 coincident with increases in atmospheric CH4 and Northern Hemisphere temperature at the onset of the Bølling (14.6–14.3 ka) and Holocene (11.6–11.4 ka) intervals are associated with small changes in δ13C-CO2, suggesting a combination of sources that included rising surface ocean temperature. Article in Journal/Newspaper Antarc* Antarctica Southern Ocean Taylor Glacier Northumbria University, Newcastle: Northumbria Research Link (NRL) Southern Ocean Taylor Glacier ENVELOPE(162.167,162.167,-77.733,-77.733) Proceedings of the National Academy of Sciences 113 13 3465 3470 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
unknown |
topic |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
spellingShingle |
F800 Physical and Terrestrial Geographical and Environmental Sciences Bauska, Thomas K. Baggenstos, Daniel Brook, Edward J. Mix, Alan C. Marcott, Shaun A. Petrenko, Vasilii V. Schaefer, Hinrich Severinghaus, Jeffrey P. Lee, James E. Carbon isotopes characterize rapid changes in atmospheric carbon dioxide during the last deglaciation |
topic_facet |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
description |
An understanding of the mechanisms that control CO2 change during glacial–interglacial cycles remains elusive. Here we help to constrain changing sources with a high-precision, high-resolution deglacial record of the stable isotopic composition of carbon in CO2 (δ13C-CO2) in air extracted from ice samples from Taylor Glacier, Antarctica. During the initial rise in atmospheric CO2 from 17.6 to 15.5 ka, these data demarcate a decrease in δ13C-CO2, likely due to a weakened oceanic biological pump. From 15.5 to 11.5 ka, the continued atmospheric CO2 rise of 40 ppm is associated with small changes in δ13C-CO2, consistent with a nearly equal contribution from a further weakening of the biological pump and rising ocean temperature. These two trends, related to marine sources, are punctuated at 16.3 and 12.9 ka with abrupt, century-scale perturbations in δ13C-CO2 that suggest rapid oxidation of organic land carbon or enhanced air–sea gas exchange in the Southern Ocean. Additional century-scale increases in atmospheric CO2 coincident with increases in atmospheric CH4 and Northern Hemisphere temperature at the onset of the Bølling (14.6–14.3 ka) and Holocene (11.6–11.4 ka) intervals are associated with small changes in δ13C-CO2, suggesting a combination of sources that included rising surface ocean temperature. |
format |
Article in Journal/Newspaper |
author |
Bauska, Thomas K. Baggenstos, Daniel Brook, Edward J. Mix, Alan C. Marcott, Shaun A. Petrenko, Vasilii V. Schaefer, Hinrich Severinghaus, Jeffrey P. Lee, James E. |
author_facet |
Bauska, Thomas K. Baggenstos, Daniel Brook, Edward J. Mix, Alan C. Marcott, Shaun A. Petrenko, Vasilii V. Schaefer, Hinrich Severinghaus, Jeffrey P. Lee, James E. |
author_sort |
Bauska, Thomas K. |
title |
Carbon isotopes characterize rapid changes in atmospheric carbon dioxide during the last deglaciation |
title_short |
Carbon isotopes characterize rapid changes in atmospheric carbon dioxide during the last deglaciation |
title_full |
Carbon isotopes characterize rapid changes in atmospheric carbon dioxide during the last deglaciation |
title_fullStr |
Carbon isotopes characterize rapid changes in atmospheric carbon dioxide during the last deglaciation |
title_full_unstemmed |
Carbon isotopes characterize rapid changes in atmospheric carbon dioxide during the last deglaciation |
title_sort |
carbon isotopes characterize rapid changes in atmospheric carbon dioxide during the last deglaciation |
publisher |
National Academy of Sciences |
publishDate |
2016 |
url |
https://nrl.northumbria.ac.uk/id/eprint/38232/ https://doi.org/10.1073/pnas.1513868113 |
long_lat |
ENVELOPE(162.167,162.167,-77.733,-77.733) |
geographic |
Southern Ocean Taylor Glacier |
geographic_facet |
Southern Ocean Taylor Glacier |
genre |
Antarc* Antarctica Southern Ocean Taylor Glacier |
genre_facet |
Antarc* Antarctica Southern Ocean Taylor Glacier |
op_relation |
Bauska, Thomas K., Baggenstos, Daniel, Brook, Edward J., Mix, Alan C., Marcott, Shaun A., Petrenko, Vasilii V., Schaefer, Hinrich, Severinghaus, Jeffrey P. and Lee, James E. (2016) Carbon isotopes characterize rapid changes in atmospheric carbon dioxide during the last deglaciation. Proceedings of the National Academy of Sciences, 113 (13). pp. 3465-3470. ISSN 0027-8424 |
op_doi |
https://doi.org/10.1073/pnas.1513868113 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
113 |
container_issue |
13 |
container_start_page |
3465 |
op_container_end_page |
3470 |
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1766264505391644672 |