BrookEdwardCEOASResponseAtmosphericAbrupt_SupportingInformationDescription.pdf
Atmospheric CO₂ records for the centennial scale cooling event 8200 years ago (8.2 ka event) may help us understand climate-carbon cycle feedbacks under interglacial conditions, which are important for understanding future climate, but existing records do not provide enough detail. Here we present a...
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ftoregonstate:ir.library.oregonstate.edu:sx61dr58f 2024-09-15T17:46:43+00:00 BrookEdwardCEOASResponseAtmosphericAbrupt_SupportingInformationDescription.pdf Ahn, Jinho Brook, Edward J. Buizert, Christo https://ir.library.oregonstate.edu/concern/articles/sx61dr58f unknown https://ir.library.oregonstate.edu/concern/articles/sx61dr58f Copyright Not Evaluated ftoregonstate 2024-07-22T18:06:03Z Atmospheric CO₂ records for the centennial scale cooling event 8200 years ago (8.2 ka event) may help us understand climate-carbon cycle feedbacks under interglacial conditions, which are important for understanding future climate, but existing records do not provide enough detail. Here we present a new CO₂ record from the Siple Dome ice core, Antarctica, that covers 7.4–9.0 ka with 8 to 16 year resolution. We observe a small, about 1–2 ppm, increase of atmospheric CO₂ during the 8.2 ka event. The increase is not significant when compared to other centennial variations in the Holocene that are not linked to large temperature changes. Our results do not agree with leaf stomata records that suggest a CO₂ decrease of up to ~25 ppm and imply that the sensitivity of atmospheric CO₂ to the primarily Northern Hemisphere cooling of the 8.2 ka event was limited. Keywords: Abrupt climate change, 8.2 ka event, Carbon dioxide, Carbon cycle Keywords: Abrupt climate change, 8.2 ka event, Carbon dioxide, Carbon cycle Other/Unknown Material Antarc* Antarctica ice core ScholarsArchive@OSU (Oregon State University) |
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ScholarsArchive@OSU (Oregon State University) |
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ftoregonstate |
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description |
Atmospheric CO₂ records for the centennial scale cooling event 8200 years ago (8.2 ka event) may help us understand climate-carbon cycle feedbacks under interglacial conditions, which are important for understanding future climate, but existing records do not provide enough detail. Here we present a new CO₂ record from the Siple Dome ice core, Antarctica, that covers 7.4–9.0 ka with 8 to 16 year resolution. We observe a small, about 1–2 ppm, increase of atmospheric CO₂ during the 8.2 ka event. The increase is not significant when compared to other centennial variations in the Holocene that are not linked to large temperature changes. Our results do not agree with leaf stomata records that suggest a CO₂ decrease of up to ~25 ppm and imply that the sensitivity of atmospheric CO₂ to the primarily Northern Hemisphere cooling of the 8.2 ka event was limited. Keywords: Abrupt climate change, 8.2 ka event, Carbon dioxide, Carbon cycle Keywords: Abrupt climate change, 8.2 ka event, Carbon dioxide, Carbon cycle |
author |
Ahn, Jinho Brook, Edward J. Buizert, Christo |
spellingShingle |
Ahn, Jinho Brook, Edward J. Buizert, Christo BrookEdwardCEOASResponseAtmosphericAbrupt_SupportingInformationDescription.pdf |
author_facet |
Ahn, Jinho Brook, Edward J. Buizert, Christo |
author_sort |
Ahn, Jinho |
title |
BrookEdwardCEOASResponseAtmosphericAbrupt_SupportingInformationDescription.pdf |
title_short |
BrookEdwardCEOASResponseAtmosphericAbrupt_SupportingInformationDescription.pdf |
title_full |
BrookEdwardCEOASResponseAtmosphericAbrupt_SupportingInformationDescription.pdf |
title_fullStr |
BrookEdwardCEOASResponseAtmosphericAbrupt_SupportingInformationDescription.pdf |
title_full_unstemmed |
BrookEdwardCEOASResponseAtmosphericAbrupt_SupportingInformationDescription.pdf |
title_sort |
brookedwardceoasresponseatmosphericabrupt_supportinginformationdescription.pdf |
url |
https://ir.library.oregonstate.edu/concern/articles/sx61dr58f |
genre |
Antarc* Antarctica ice core |
genre_facet |
Antarc* Antarctica ice core |
op_relation |
https://ir.library.oregonstate.edu/concern/articles/sx61dr58f |
op_rights |
Copyright Not Evaluated |
_version_ |
1810495058723471360 |