Links between atmospheric carbon dioxide, the land carbon reservoir and climate over the past millennium
The stability of terrestrial carbon reservoirs is thought to be closely linked to variations in climate 1, but the magnitude of carbon–climate feedbacks has proved dificult to constrain for both modern 2–4 and millennial 5–13 timescales. Reconstructions of atmospheric CO2 concentrations for the past...
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Online Access: | https://boris.unibe.ch/69031/1/ngeo2422.pdf https://boris.unibe.ch/69031/ |
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ftunivbern:oai:boris.unibe.ch:69031 2023-08-20T04:01:48+02:00 Links between atmospheric carbon dioxide, the land carbon reservoir and climate over the past millennium Bauska, Thomas K. Joos, Fortunat Mix, Alan C. Roth, Raphael Ahn, Jinho Brook, Edward J. 2015-04-27 application/pdf https://boris.unibe.ch/69031/1/ngeo2422.pdf https://boris.unibe.ch/69031/ eng eng Nature Publishing Group https://boris.unibe.ch/69031/ info:eu-repo/semantics/restrictedAccess Bauska, Thomas K.; Joos, Fortunat; Mix, Alan C.; Roth, Raphael; Ahn, Jinho; Brook, Edward J. (2015). Links between atmospheric carbon dioxide, the land carbon reservoir and climate over the past millennium. Nature geoscience, 8(5), pp. 383-387. Nature Publishing Group 10.1038/ngeo2422 <http://dx.doi.org/10.1038/ngeo2422> 530 Physics 550 Earth sciences & geology info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2015 ftunivbern https://doi.org/10.1038/ngeo2422 2023-07-31T21:18:06Z The stability of terrestrial carbon reservoirs is thought to be closely linked to variations in climate 1, but the magnitude of carbon–climate feedbacks has proved dificult to constrain for both modern 2–4 and millennial 5–13 timescales. Reconstructions of atmospheric CO2 concentrations for the past thousand years have shown fluctuations on multidecadal to centennial timescales 5–7, but the causes of these fluctuations are unclear. Here we report high-resolution carbon isotope measurements of CO2 trapped within the ice of the West Antarctic Ice Sheet Divide ice core for the past 1,000 years. We use a deconvolution approach 14 to show that changes in terrestrial organic carbon stores best explain the observed multidecadal variations in the 13 C of CO2 and in CO2 concentrations from 755 to 1850 CE. If significant long-term carbon emissions came from pre-industrial anthropogenic land-use changes over this interval, the emissions must have been offset by a natural terrestrial sink for 13 C-depleted carbon, such as peatlands. We find that on multidecadal timescales, carbon cycle changes seem to vary with reconstructed regional climate changes. We conclude that climate variability could be an important control of fluctuations in land carbon storage on these timescales. Article in Journal/Newspaper Antarc* Antarctic ice core Ice Sheet BORIS (Bern Open Repository and Information System, University of Bern) Antarctic West Antarctic Ice Sheet Nature Geoscience 8 5 383 387 |
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Open Polar |
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BORIS (Bern Open Repository and Information System, University of Bern) |
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ftunivbern |
language |
English |
topic |
530 Physics 550 Earth sciences & geology |
spellingShingle |
530 Physics 550 Earth sciences & geology Bauska, Thomas K. Joos, Fortunat Mix, Alan C. Roth, Raphael Ahn, Jinho Brook, Edward J. Links between atmospheric carbon dioxide, the land carbon reservoir and climate over the past millennium |
topic_facet |
530 Physics 550 Earth sciences & geology |
description |
The stability of terrestrial carbon reservoirs is thought to be closely linked to variations in climate 1, but the magnitude of carbon–climate feedbacks has proved dificult to constrain for both modern 2–4 and millennial 5–13 timescales. Reconstructions of atmospheric CO2 concentrations for the past thousand years have shown fluctuations on multidecadal to centennial timescales 5–7, but the causes of these fluctuations are unclear. Here we report high-resolution carbon isotope measurements of CO2 trapped within the ice of the West Antarctic Ice Sheet Divide ice core for the past 1,000 years. We use a deconvolution approach 14 to show that changes in terrestrial organic carbon stores best explain the observed multidecadal variations in the 13 C of CO2 and in CO2 concentrations from 755 to 1850 CE. If significant long-term carbon emissions came from pre-industrial anthropogenic land-use changes over this interval, the emissions must have been offset by a natural terrestrial sink for 13 C-depleted carbon, such as peatlands. We find that on multidecadal timescales, carbon cycle changes seem to vary with reconstructed regional climate changes. We conclude that climate variability could be an important control of fluctuations in land carbon storage on these timescales. |
format |
Article in Journal/Newspaper |
author |
Bauska, Thomas K. Joos, Fortunat Mix, Alan C. Roth, Raphael Ahn, Jinho Brook, Edward J. |
author_facet |
Bauska, Thomas K. Joos, Fortunat Mix, Alan C. Roth, Raphael Ahn, Jinho Brook, Edward J. |
author_sort |
Bauska, Thomas K. |
title |
Links between atmospheric carbon dioxide, the land carbon reservoir and climate over the past millennium |
title_short |
Links between atmospheric carbon dioxide, the land carbon reservoir and climate over the past millennium |
title_full |
Links between atmospheric carbon dioxide, the land carbon reservoir and climate over the past millennium |
title_fullStr |
Links between atmospheric carbon dioxide, the land carbon reservoir and climate over the past millennium |
title_full_unstemmed |
Links between atmospheric carbon dioxide, the land carbon reservoir and climate over the past millennium |
title_sort |
links between atmospheric carbon dioxide, the land carbon reservoir and climate over the past millennium |
publisher |
Nature Publishing Group |
publishDate |
2015 |
url |
https://boris.unibe.ch/69031/1/ngeo2422.pdf https://boris.unibe.ch/69031/ |
geographic |
Antarctic West Antarctic Ice Sheet |
geographic_facet |
Antarctic West Antarctic Ice Sheet |
genre |
Antarc* Antarctic ice core Ice Sheet |
genre_facet |
Antarc* Antarctic ice core Ice Sheet |
op_source |
Bauska, Thomas K.; Joos, Fortunat; Mix, Alan C.; Roth, Raphael; Ahn, Jinho; Brook, Edward J. (2015). Links between atmospheric carbon dioxide, the land carbon reservoir and climate over the past millennium. Nature geoscience, 8(5), pp. 383-387. Nature Publishing Group 10.1038/ngeo2422 <http://dx.doi.org/10.1038/ngeo2422> |
op_relation |
https://boris.unibe.ch/69031/ |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1038/ngeo2422 |
container_title |
Nature Geoscience |
container_volume |
8 |
container_issue |
5 |
container_start_page |
383 |
op_container_end_page |
387 |
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1774725019074560000 |