The 852/3 CE Mount Churchill eruption: examining the potential climatic and societal impacts and the timing of the Medieval Climate Anomaly in the North Atlantic region
The 852/3 CE eruption of Mount Churchill, Alaska, was one of the largest first-millennium volcanic events, with a magnitude of 6.7 (VEI 6) and a tephra volume of 39.4–61.9 km3 (95 % confidence). The spatial extent of the ash fallout from this event is considerable and the cryptotephra (White River A...
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ftunivgeneve:oai:unige.ch:aou:unige:166994 2023-10-01T03:56:23+02:00 The 852/3 CE Mount Churchill eruption: examining the potential climatic and societal impacts and the timing of the Medieval Climate Anomaly in the North Atlantic region Mackay, Helen Plunkett, Gill Jensen, Britta J. L. Aubry, Thomas J. Corona, Christophe Kim, Woon Mi Toohey, Matthew Sigl, Michael Stoffel, Markus Anchukaitis, Kevin J. Raible, Christoph Bolton, Matthew S. M. Manning, Joseph G. Newfield, Timothy P. Di Cosmo, Nicola Ludlow, Francis Kostick, Conor Yang, Zhen Coyle McClung, Lisa Amesbury, Matthew Monteath, Alistair Hughes, Paul D. M. Langdon, Pete G. Charman, Dan Booth, Robert Davies, Kimberley L. Blundell, Antony Swindles, Graeme T. 2022 https://archive-ouverte.unige.ch/unige:166994 eng eng info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-18-1475-2022 https://archive-ouverte.unige.ch/unige:166994 unige:166994 info:eu-repo/semantics/openAccess ISSN: 1814-9324 Climate of the past, vol. 18, no. 6 (2022) p. 1475-1508 info:eu-repo/classification/ddc/550 info:eu-repo/classification/ddc/333.7-333.9 info:eu-repo/semantics/article Text Article scientifique info:eu-repo/semantics/publishedVersion 2022 ftunivgeneve https://doi.org/10.5194/cp-18-1475-2022 2023-09-07T08:15:27Z The 852/3 CE eruption of Mount Churchill, Alaska, was one of the largest first-millennium volcanic events, with a magnitude of 6.7 (VEI 6) and a tephra volume of 39.4–61.9 km3 (95 % confidence). The spatial extent of the ash fallout from this event is considerable and the cryptotephra (White River Ash east; WRAe) extends as far as Finland and Poland. Proximal ecosystem and societal disturbances have been linked with this eruption; however, wider eruption impacts on climate and society are unknown. Greenland ice core records show that the eruption occurred in winter 852/3 ± 1 CE and that the eruption is associated with a relatively moderate sulfate aerosol loading but large abundances of volcanic ash and chlorine. Here we assess the potential broader impact of this eruption using palaeoenvironmental reconstructions, historical records and climate model simulations. We also use the fortuitous timing of the 852/3 CE Churchill eruption and its extensively widespread tephra deposition of the White River Ash (east) (WRAe) to examine the climatic expression of the warm Medieval Climate Anomaly period (MCA; ca. 950–1250 CE) from precisely linked peatlands in the North Atlantic region. The reconstructed climate forcing potential of the 852/3 CE Churchill eruption is moderate compared with the eruption magnitude, but tree-ring-inferred temperatures report a significant atmospheric cooling of 0.8 ∘C in summer 853 CE. Modelled climate scenarios also show a cooling in 853 CE, although the average magnitude of cooling is smaller (0.3 ∘C). The simulated spatial patterns of cooling are generally similar to those generated using the tree-ring-inferred temperature reconstructions. Tree-ring-inferred cooling begins prior to the date of the eruption suggesting that natural internal climate variability may have increased the climate system's susceptibility to further cooling. The magnitude of the reconstructed cooling could also suggest that the climate forcing potential of this eruption may be underestimated, thereby highlighting ... Article in Journal/Newspaper Greenland Greenland ice core ice core North Atlantic Alaska Université de Genève: Archive ouverte UNIGE Greenland Climate of the Past 18 6 1475 1508 |
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Université de Genève: Archive ouverte UNIGE |
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ftunivgeneve |
language |
English |
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info:eu-repo/classification/ddc/550 info:eu-repo/classification/ddc/333.7-333.9 |
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info:eu-repo/classification/ddc/550 info:eu-repo/classification/ddc/333.7-333.9 Mackay, Helen Plunkett, Gill Jensen, Britta J. L. Aubry, Thomas J. Corona, Christophe Kim, Woon Mi Toohey, Matthew Sigl, Michael Stoffel, Markus Anchukaitis, Kevin J. Raible, Christoph Bolton, Matthew S. M. Manning, Joseph G. Newfield, Timothy P. Di Cosmo, Nicola Ludlow, Francis Kostick, Conor Yang, Zhen Coyle McClung, Lisa Amesbury, Matthew Monteath, Alistair Hughes, Paul D. M. Langdon, Pete G. Charman, Dan Booth, Robert Davies, Kimberley L. Blundell, Antony Swindles, Graeme T. The 852/3 CE Mount Churchill eruption: examining the potential climatic and societal impacts and the timing of the Medieval Climate Anomaly in the North Atlantic region |
topic_facet |
info:eu-repo/classification/ddc/550 info:eu-repo/classification/ddc/333.7-333.9 |
description |
The 852/3 CE eruption of Mount Churchill, Alaska, was one of the largest first-millennium volcanic events, with a magnitude of 6.7 (VEI 6) and a tephra volume of 39.4–61.9 km3 (95 % confidence). The spatial extent of the ash fallout from this event is considerable and the cryptotephra (White River Ash east; WRAe) extends as far as Finland and Poland. Proximal ecosystem and societal disturbances have been linked with this eruption; however, wider eruption impacts on climate and society are unknown. Greenland ice core records show that the eruption occurred in winter 852/3 ± 1 CE and that the eruption is associated with a relatively moderate sulfate aerosol loading but large abundances of volcanic ash and chlorine. Here we assess the potential broader impact of this eruption using palaeoenvironmental reconstructions, historical records and climate model simulations. We also use the fortuitous timing of the 852/3 CE Churchill eruption and its extensively widespread tephra deposition of the White River Ash (east) (WRAe) to examine the climatic expression of the warm Medieval Climate Anomaly period (MCA; ca. 950–1250 CE) from precisely linked peatlands in the North Atlantic region. The reconstructed climate forcing potential of the 852/3 CE Churchill eruption is moderate compared with the eruption magnitude, but tree-ring-inferred temperatures report a significant atmospheric cooling of 0.8 ∘C in summer 853 CE. Modelled climate scenarios also show a cooling in 853 CE, although the average magnitude of cooling is smaller (0.3 ∘C). The simulated spatial patterns of cooling are generally similar to those generated using the tree-ring-inferred temperature reconstructions. Tree-ring-inferred cooling begins prior to the date of the eruption suggesting that natural internal climate variability may have increased the climate system's susceptibility to further cooling. The magnitude of the reconstructed cooling could also suggest that the climate forcing potential of this eruption may be underestimated, thereby highlighting ... |
format |
Article in Journal/Newspaper |
author |
Mackay, Helen Plunkett, Gill Jensen, Britta J. L. Aubry, Thomas J. Corona, Christophe Kim, Woon Mi Toohey, Matthew Sigl, Michael Stoffel, Markus Anchukaitis, Kevin J. Raible, Christoph Bolton, Matthew S. M. Manning, Joseph G. Newfield, Timothy P. Di Cosmo, Nicola Ludlow, Francis Kostick, Conor Yang, Zhen Coyle McClung, Lisa Amesbury, Matthew Monteath, Alistair Hughes, Paul D. M. Langdon, Pete G. Charman, Dan Booth, Robert Davies, Kimberley L. Blundell, Antony Swindles, Graeme T. |
author_facet |
Mackay, Helen Plunkett, Gill Jensen, Britta J. L. Aubry, Thomas J. Corona, Christophe Kim, Woon Mi Toohey, Matthew Sigl, Michael Stoffel, Markus Anchukaitis, Kevin J. Raible, Christoph Bolton, Matthew S. M. Manning, Joseph G. Newfield, Timothy P. Di Cosmo, Nicola Ludlow, Francis Kostick, Conor Yang, Zhen Coyle McClung, Lisa Amesbury, Matthew Monteath, Alistair Hughes, Paul D. M. Langdon, Pete G. Charman, Dan Booth, Robert Davies, Kimberley L. Blundell, Antony Swindles, Graeme T. |
author_sort |
Mackay, Helen |
title |
The 852/3 CE Mount Churchill eruption: examining the potential climatic and societal impacts and the timing of the Medieval Climate Anomaly in the North Atlantic region |
title_short |
The 852/3 CE Mount Churchill eruption: examining the potential climatic and societal impacts and the timing of the Medieval Climate Anomaly in the North Atlantic region |
title_full |
The 852/3 CE Mount Churchill eruption: examining the potential climatic and societal impacts and the timing of the Medieval Climate Anomaly in the North Atlantic region |
title_fullStr |
The 852/3 CE Mount Churchill eruption: examining the potential climatic and societal impacts and the timing of the Medieval Climate Anomaly in the North Atlantic region |
title_full_unstemmed |
The 852/3 CE Mount Churchill eruption: examining the potential climatic and societal impacts and the timing of the Medieval Climate Anomaly in the North Atlantic region |
title_sort |
852/3 ce mount churchill eruption: examining the potential climatic and societal impacts and the timing of the medieval climate anomaly in the north atlantic region |
publishDate |
2022 |
url |
https://archive-ouverte.unige.ch/unige:166994 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice core ice core North Atlantic Alaska |
genre_facet |
Greenland Greenland ice core ice core North Atlantic Alaska |
op_source |
ISSN: 1814-9324 Climate of the past, vol. 18, no. 6 (2022) p. 1475-1508 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-18-1475-2022 https://archive-ouverte.unige.ch/unige:166994 unige:166994 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-18-1475-2022 |
container_title |
Climate of the Past |
container_volume |
18 |
container_issue |
6 |
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1475 |
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1508 |
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1778525901362823168 |