BrookEdwardCEOASResponseAtmosphericAbrupt_SupportingInformation.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:9k41zk45q 2023-11-12T04:06:19+01:00 BrookEdwardCEOASResponseAtmosphericAbrupt_SupportingInformation.pdf Ahn, Jinho Brook, Edward J. Buizert, Christo https://ir.library.oregonstate.edu/concern/articles/9k41zk45q unknown https://ir.library.oregonstate.edu/concern/articles/9k41zk45q Copyright Not Evaluated ftoregonstate 2023-10-22T16:41:37Z 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: Carbon dioxide, Carbon cycle, 8.2 ka event, Abrupt climate change Keywords: Carbon dioxide, Carbon cycle, 8.2 ka event, Abrupt climate change Other/Unknown Material Antarc* Antarctica ice core ScholarsArchive@OSU (Oregon State University) Siple ENVELOPE(-83.917,-83.917,-75.917,-75.917) Siple Dome ENVELOPE(-148.833,-148.833,-81.667,-81.667) |
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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: Carbon dioxide, Carbon cycle, 8.2 ka event, Abrupt climate change Keywords: Carbon dioxide, Carbon cycle, 8.2 ka event, Abrupt climate change |
author |
Ahn, Jinho Brook, Edward J. Buizert, Christo |
spellingShingle |
Ahn, Jinho Brook, Edward J. Buizert, Christo BrookEdwardCEOASResponseAtmosphericAbrupt_SupportingInformation.pdf |
author_facet |
Ahn, Jinho Brook, Edward J. Buizert, Christo |
author_sort |
Ahn, Jinho |
title |
BrookEdwardCEOASResponseAtmosphericAbrupt_SupportingInformation.pdf |
title_short |
BrookEdwardCEOASResponseAtmosphericAbrupt_SupportingInformation.pdf |
title_full |
BrookEdwardCEOASResponseAtmosphericAbrupt_SupportingInformation.pdf |
title_fullStr |
BrookEdwardCEOASResponseAtmosphericAbrupt_SupportingInformation.pdf |
title_full_unstemmed |
BrookEdwardCEOASResponseAtmosphericAbrupt_SupportingInformation.pdf |
title_sort |
brookedwardceoasresponseatmosphericabrupt_supportinginformation.pdf |
url |
https://ir.library.oregonstate.edu/concern/articles/9k41zk45q |
long_lat |
ENVELOPE(-83.917,-83.917,-75.917,-75.917) ENVELOPE(-148.833,-148.833,-81.667,-81.667) |
geographic |
Siple Siple Dome |
geographic_facet |
Siple Siple Dome |
genre |
Antarc* Antarctica ice core |
genre_facet |
Antarc* Antarctica ice core |
op_relation |
https://ir.library.oregonstate.edu/concern/articles/9k41zk45q |
op_rights |
Copyright Not Evaluated |
_version_ |
1782327421408641024 |