A radiocarbon spike at 14 300 cal yr BP in subfossil trees provides the impulse response function of the global carbon cycle during the Late Glacial
We present new 14C results measured on subfossil Scots Pines recovered in the eroded banks of the Drouzet watercourse in the Southern French Alps. About 400 new 14C ages have been analysed on 15 trees sampled at annual resolution. The resulting Δ14C record exhibits an abrupt spike occurring in a sin...
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The Royal Society
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ftleedsuniv:oai:eprints.whiterose.ac.uk:213120 2024-06-23T07:53:22+00:00 A radiocarbon spike at 14 300 cal yr BP in subfossil trees provides the impulse response function of the global carbon cycle during the Late Glacial Bard, E. Miramont, C. Capano, M. Guibal, F. Marschal, C. Rostek, F. Tuna, T. Fagault, Y. Heaton, T.J. 2023-11-27 text https://eprints.whiterose.ac.uk/213120/ https://eprints.whiterose.ac.uk/213120/1/bard-et-al-2023-a-radiocarbon-spike-at-14-300-cal-yr-bp-in-subfossil-trees-provides-the-impulse-response-function-of.pdf en eng The Royal Society https://eprints.whiterose.ac.uk/213120/1/bard-et-al-2023-a-radiocarbon-spike-at-14-300-cal-yr-bp-in-subfossil-trees-provides-the-impulse-response-function-of.pdf Bard, E. orcid.org/0000-0002-7237-8622 , Miramont, C. orcid.org/0000-0001-5462-0131 , Capano, M. et al. (6 more authors) (2023) A radiocarbon spike at 14 300 cal yr BP in subfossil trees provides the impulse response function of the global carbon cycle during the Late Glacial. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 381 (2261). 20220206. ISSN 1364-503X cc_by_4 Article NonPeerReviewed 2023 ftleedsuniv 2024-06-12T00:26:03Z We present new 14C results measured on subfossil Scots Pines recovered in the eroded banks of the Drouzet watercourse in the Southern French Alps. About 400 new 14C ages have been analysed on 15 trees sampled at annual resolution. The resulting Δ14C record exhibits an abrupt spike occurring in a single year at 14 300–14 299 cal yr BP and a century-long event between 14 and 13.9 cal kyr BP. In order to identify the causes of these events, we compare the Drouzet Δ14C record with simulations of Δ14C based on the 10Be record in Greenland ice used as an input of a carbon cycle model. The correspondence with 10Be anomalies allows us to propose the 14.3 cal kyr BP event as a solar energetic particle event. By contrast, the 14 cal kyr BP event lasted about a century and is most probably a common Maunder-type solar minimum linked to the modulation of galactic cosmic particles by the heliomagnetic field. We also discuss and speculate about the synchroneity and the possible causes of the 14 cal kyr BP event with the brief cold phase called Older Dryas, which separates the Bølling and Allerød millennium-long warm phases of the Late Glacial period. Article in Journal/Newspaper Greenland White Rose Research Online (Universities of Leeds, Sheffield & York) Greenland |
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White Rose Research Online (Universities of Leeds, Sheffield & York) |
op_collection_id |
ftleedsuniv |
language |
English |
description |
We present new 14C results measured on subfossil Scots Pines recovered in the eroded banks of the Drouzet watercourse in the Southern French Alps. About 400 new 14C ages have been analysed on 15 trees sampled at annual resolution. The resulting Δ14C record exhibits an abrupt spike occurring in a single year at 14 300–14 299 cal yr BP and a century-long event between 14 and 13.9 cal kyr BP. In order to identify the causes of these events, we compare the Drouzet Δ14C record with simulations of Δ14C based on the 10Be record in Greenland ice used as an input of a carbon cycle model. The correspondence with 10Be anomalies allows us to propose the 14.3 cal kyr BP event as a solar energetic particle event. By contrast, the 14 cal kyr BP event lasted about a century and is most probably a common Maunder-type solar minimum linked to the modulation of galactic cosmic particles by the heliomagnetic field. We also discuss and speculate about the synchroneity and the possible causes of the 14 cal kyr BP event with the brief cold phase called Older Dryas, which separates the Bølling and Allerød millennium-long warm phases of the Late Glacial period. |
format |
Article in Journal/Newspaper |
author |
Bard, E. Miramont, C. Capano, M. Guibal, F. Marschal, C. Rostek, F. Tuna, T. Fagault, Y. Heaton, T.J. |
spellingShingle |
Bard, E. Miramont, C. Capano, M. Guibal, F. Marschal, C. Rostek, F. Tuna, T. Fagault, Y. Heaton, T.J. A radiocarbon spike at 14 300 cal yr BP in subfossil trees provides the impulse response function of the global carbon cycle during the Late Glacial |
author_facet |
Bard, E. Miramont, C. Capano, M. Guibal, F. Marschal, C. Rostek, F. Tuna, T. Fagault, Y. Heaton, T.J. |
author_sort |
Bard, E. |
title |
A radiocarbon spike at 14 300 cal yr BP in subfossil trees provides the impulse response function of the global carbon cycle during the Late Glacial |
title_short |
A radiocarbon spike at 14 300 cal yr BP in subfossil trees provides the impulse response function of the global carbon cycle during the Late Glacial |
title_full |
A radiocarbon spike at 14 300 cal yr BP in subfossil trees provides the impulse response function of the global carbon cycle during the Late Glacial |
title_fullStr |
A radiocarbon spike at 14 300 cal yr BP in subfossil trees provides the impulse response function of the global carbon cycle during the Late Glacial |
title_full_unstemmed |
A radiocarbon spike at 14 300 cal yr BP in subfossil trees provides the impulse response function of the global carbon cycle during the Late Glacial |
title_sort |
radiocarbon spike at 14 300 cal yr bp in subfossil trees provides the impulse response function of the global carbon cycle during the late glacial |
publisher |
The Royal Society |
publishDate |
2023 |
url |
https://eprints.whiterose.ac.uk/213120/ https://eprints.whiterose.ac.uk/213120/1/bard-et-al-2023-a-radiocarbon-spike-at-14-300-cal-yr-bp-in-subfossil-trees-provides-the-impulse-response-function-of.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_relation |
https://eprints.whiterose.ac.uk/213120/1/bard-et-al-2023-a-radiocarbon-spike-at-14-300-cal-yr-bp-in-subfossil-trees-provides-the-impulse-response-function-of.pdf Bard, E. orcid.org/0000-0002-7237-8622 , Miramont, C. orcid.org/0000-0001-5462-0131 , Capano, M. et al. (6 more authors) (2023) A radiocarbon spike at 14 300 cal yr BP in subfossil trees provides the impulse response function of the global carbon cycle during the Late Glacial. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 381 (2261). 20220206. ISSN 1364-503X |
op_rights |
cc_by_4 |
_version_ |
1802644965340217344 |