Volcanic forcing and climate variations during the last glacial period
Measurements of δ 18 O in the Greenland Ice Sheet Project 2 (GISP2) ice-core from Summit, Greenland, show repeated temporal variations associated with rapid warming events throughout the last glacial period of the Pleistocene-10–110 kya. The majority of these warming events are preceded in the ice-c...
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ftcopernicus:oai:publications.copernicus.org:cpd16755 2023-05-15T16:27:15+02:00 Volcanic forcing and climate variations during the last glacial period Flinders, A. F. 2018-09-26 application/pdf https://doi.org/10.5194/cpd-8-4941-2012 https://cp.copernicus.org/preprints/cp-2012-123/ eng eng doi:10.5194/cpd-8-4941-2012 https://cp.copernicus.org/preprints/cp-2012-123/ eISSN: 1814-9332 Text 2018 ftcopernicus https://doi.org/10.5194/cpd-8-4941-2012 2020-07-20T16:25:42Z Measurements of δ 18 O in the Greenland Ice Sheet Project 2 (GISP2) ice-core from Summit, Greenland, show repeated temporal variations associated with rapid warming events throughout the last glacial period of the Pleistocene-10–110 kya. The majority of these warming events are preceded in the ice-core record by an increased concentration of insoluble micro-particulate sulfate, indicative of increases in global volcanism. Wavelet analysis of ice-core and marine-sediment records show a repeated 5000–6000 yr periodicity in both volcanic SO 4 and δ 18 O ice records, as well as a 5000–8000 yr cycle in the lithic concentration of ice-rafted debris, atmospheric CO 2 concentration, and a database of late Quaternary volcanic eruptions. Increasing concentrations in atmospheric CO 2 and CH 4 initiated during periods of increased volcanism, peaking during a warm transition, reflect a volcanic-atmospheric-deglaciation feedback, regulated by meridional overturning current-shutdown related cooling. Text Greenland Greenland Ice Sheet Project ice core Ice Sheet Copernicus Publications: E-Journals Greenland Kya ENVELOPE(8.308,8.308,63.772,63.772) |
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Open Polar |
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Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Measurements of δ 18 O in the Greenland Ice Sheet Project 2 (GISP2) ice-core from Summit, Greenland, show repeated temporal variations associated with rapid warming events throughout the last glacial period of the Pleistocene-10–110 kya. The majority of these warming events are preceded in the ice-core record by an increased concentration of insoluble micro-particulate sulfate, indicative of increases in global volcanism. Wavelet analysis of ice-core and marine-sediment records show a repeated 5000–6000 yr periodicity in both volcanic SO 4 and δ 18 O ice records, as well as a 5000–8000 yr cycle in the lithic concentration of ice-rafted debris, atmospheric CO 2 concentration, and a database of late Quaternary volcanic eruptions. Increasing concentrations in atmospheric CO 2 and CH 4 initiated during periods of increased volcanism, peaking during a warm transition, reflect a volcanic-atmospheric-deglaciation feedback, regulated by meridional overturning current-shutdown related cooling. |
format |
Text |
author |
Flinders, A. F. |
spellingShingle |
Flinders, A. F. Volcanic forcing and climate variations during the last glacial period |
author_facet |
Flinders, A. F. |
author_sort |
Flinders, A. F. |
title |
Volcanic forcing and climate variations during the last glacial period |
title_short |
Volcanic forcing and climate variations during the last glacial period |
title_full |
Volcanic forcing and climate variations during the last glacial period |
title_fullStr |
Volcanic forcing and climate variations during the last glacial period |
title_full_unstemmed |
Volcanic forcing and climate variations during the last glacial period |
title_sort |
volcanic forcing and climate variations during the last glacial period |
publishDate |
2018 |
url |
https://doi.org/10.5194/cpd-8-4941-2012 https://cp.copernicus.org/preprints/cp-2012-123/ |
long_lat |
ENVELOPE(8.308,8.308,63.772,63.772) |
geographic |
Greenland Kya |
geographic_facet |
Greenland Kya |
genre |
Greenland Greenland Ice Sheet Project ice core Ice Sheet |
genre_facet |
Greenland Greenland Ice Sheet Project ice core Ice Sheet |
op_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cpd-8-4941-2012 https://cp.copernicus.org/preprints/cp-2012-123/ |
op_doi |
https://doi.org/10.5194/cpd-8-4941-2012 |
_version_ |
1766016367820013568 |