Carbon isotopes characterize rapid changes in atmospheric carbon dioxide during the last deglaciation
Antarctic ice cores provide a precise, well-dated history of increasing atmospheric CO2 during the last glacial to interglacial transition. However, the mechanisms that drive the increase remain unclear. Here we reconstruct a key indicator of the sources of atmospheric CO2 by measuring the stable is...
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ftpubmed:oai:pubmedcentral.nih.gov:4822573 2023-05-15T13:56:31+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 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4822573/ http://www.ncbi.nlm.nih.gov/pubmed/26976561 https://doi.org/10.1073/pnas.1513868113 en eng National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4822573/ http://www.ncbi.nlm.nih.gov/pubmed/26976561 http://dx.doi.org/10.1073/pnas.1513868113 Physical Sciences Text 2016 ftpubmed https://doi.org/10.1073/pnas.1513868113 2016-10-02T00:01:52Z Antarctic ice cores provide a precise, well-dated history of increasing atmospheric CO2 during the last glacial to interglacial transition. However, the mechanisms that drive the increase remain unclear. Here we reconstruct a key indicator of the sources of atmospheric CO2 by measuring the stable isotopic composition of CO2 in samples spanning the period from 22,000 to 11,000 years ago from Taylor Glacier, Antarctica. Improvements in precision and resolution allow us to fingerprint CO2 sources on the centennial scale. The data reveal two intervals of rapid CO2 rise that are plausibly driven by sources from land carbon (at 16.3 and 12.9 ka) and two others that appear fundamentally different and likely reflect a combination of sources (at 14.6 and 11.5 ka). Text Antarc* Antarctic Antarctica Taylor Glacier PubMed Central (PMC) Antarctic Taylor Glacier ENVELOPE(162.167,162.167,-77.733,-77.733) Proceedings of the National Academy of Sciences 113 13 3465 3470 |
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PubMed Central (PMC) |
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language |
English |
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Physical Sciences |
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Physical 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 |
Physical Sciences |
description |
Antarctic ice cores provide a precise, well-dated history of increasing atmospheric CO2 during the last glacial to interglacial transition. However, the mechanisms that drive the increase remain unclear. Here we reconstruct a key indicator of the sources of atmospheric CO2 by measuring the stable isotopic composition of CO2 in samples spanning the period from 22,000 to 11,000 years ago from Taylor Glacier, Antarctica. Improvements in precision and resolution allow us to fingerprint CO2 sources on the centennial scale. The data reveal two intervals of rapid CO2 rise that are plausibly driven by sources from land carbon (at 16.3 and 12.9 ka) and two others that appear fundamentally different and likely reflect a combination of sources (at 14.6 and 11.5 ka). |
format |
Text |
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 |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4822573/ http://www.ncbi.nlm.nih.gov/pubmed/26976561 https://doi.org/10.1073/pnas.1513868113 |
long_lat |
ENVELOPE(162.167,162.167,-77.733,-77.733) |
geographic |
Antarctic Taylor Glacier |
geographic_facet |
Antarctic Taylor Glacier |
genre |
Antarc* Antarctic Antarctica Taylor Glacier |
genre_facet |
Antarc* Antarctic Antarctica Taylor Glacier |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4822573/ http://www.ncbi.nlm.nih.gov/pubmed/26976561 http://dx.doi.org/10.1073/pnas.1513868113 |
op_doi |
https://doi.org/10.1073/pnas.1513868113 |
container_title |
Proceedings of the National Academy of Sciences |
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113 |
container_issue |
13 |
container_start_page |
3465 |
op_container_end_page |
3470 |
_version_ |
1766264014066679808 |