A record of atmospheric CO₂ during the last 40,000 years from the Siple Dome, Antarctica ice core
We have measured the CO₂ concentration of air occluded during the last 40,000 years in the deep Siple Dome A (hereafter Siple Dome) ice core, Antarctica. The general trend of CO₂ concentration from Siple Dome ice follows the temperature inferred from the isotopic composition of the ice and is mostly...
Main Authors: | , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English unknown |
Published: |
American Geophysical Union
|
Subjects: | |
Online Access: | https://ir.library.oregonstate.edu/concern/articles/7h149v183 |
id |
ftoregonstate:ir.library.oregonstate.edu:7h149v183 |
---|---|
record_format |
openpolar |
spelling |
ftoregonstate:ir.library.oregonstate.edu:7h149v183 2024-09-15T17:46:50+00:00 A record of atmospheric CO₂ during the last 40,000 years from the Siple Dome, Antarctica ice core Ahn, Jinho Wahlen, Martin Deck, Bruce L. Brook, Edward J. Mayewski, Paul A. Taylor, Kendrick C. White, James W. C. https://ir.library.oregonstate.edu/concern/articles/7h149v183 English [eng] eng unknown American Geophysical Union https://ir.library.oregonstate.edu/concern/articles/7h149v183 Copyright Not Evaluated Article ftoregonstate 2024-07-22T18:06:03Z We have measured the CO₂ concentration of air occluded during the last 40,000 years in the deep Siple Dome A (hereafter Siple Dome) ice core, Antarctica. The general trend of CO₂ concentration from Siple Dome ice follows the temperature inferred from the isotopic composition of the ice and is mostly in agreement with other Antarctic ice core CO₂ records. CO₂ rose initially at ~17.5 kyr B.P. (thousand years before 1950), decreased slowly during the Antarctic Cold Reversal, rose during the Younger Dryas, fell to a local minimum at around 8 kyr B.P., and rose continuously since then. The CO₂ concentration never reached steady state during the Holocene, as also found in the Taylor Dome and EPICA Dome C (hereafter Dome C) records. During the last glacial termination, a lag of CO₂ versus Siple Dome isotopic temperature is probable. The Siple Dome CO₂ concentrations during the last glacial termination and in the Holocene are at certain times greater than in other Antarctic ice cores by up to 20 ppm (μmol CO₂/mol air). While in situ production of CO₂ is one possible cause of the sporadic elevated levels, the mechanism leading to the enrichment is not yet clear. Keywords: Siple Dome, paleoclimate, CO₂ Article in Journal/Newspaper Antarc* Antarctic Antarctica EPICA ice core ScholarsArchive@OSU (Oregon State University) |
institution |
Open Polar |
collection |
ScholarsArchive@OSU (Oregon State University) |
op_collection_id |
ftoregonstate |
language |
English unknown |
description |
We have measured the CO₂ concentration of air occluded during the last 40,000 years in the deep Siple Dome A (hereafter Siple Dome) ice core, Antarctica. The general trend of CO₂ concentration from Siple Dome ice follows the temperature inferred from the isotopic composition of the ice and is mostly in agreement with other Antarctic ice core CO₂ records. CO₂ rose initially at ~17.5 kyr B.P. (thousand years before 1950), decreased slowly during the Antarctic Cold Reversal, rose during the Younger Dryas, fell to a local minimum at around 8 kyr B.P., and rose continuously since then. The CO₂ concentration never reached steady state during the Holocene, as also found in the Taylor Dome and EPICA Dome C (hereafter Dome C) records. During the last glacial termination, a lag of CO₂ versus Siple Dome isotopic temperature is probable. The Siple Dome CO₂ concentrations during the last glacial termination and in the Holocene are at certain times greater than in other Antarctic ice cores by up to 20 ppm (μmol CO₂/mol air). While in situ production of CO₂ is one possible cause of the sporadic elevated levels, the mechanism leading to the enrichment is not yet clear. Keywords: Siple Dome, paleoclimate, CO₂ |
format |
Article in Journal/Newspaper |
author |
Ahn, Jinho Wahlen, Martin Deck, Bruce L. Brook, Edward J. Mayewski, Paul A. Taylor, Kendrick C. White, James W. C. |
spellingShingle |
Ahn, Jinho Wahlen, Martin Deck, Bruce L. Brook, Edward J. Mayewski, Paul A. Taylor, Kendrick C. White, James W. C. A record of atmospheric CO₂ during the last 40,000 years from the Siple Dome, Antarctica ice core |
author_facet |
Ahn, Jinho Wahlen, Martin Deck, Bruce L. Brook, Edward J. Mayewski, Paul A. Taylor, Kendrick C. White, James W. C. |
author_sort |
Ahn, Jinho |
title |
A record of atmospheric CO₂ during the last 40,000 years from the Siple Dome, Antarctica ice core |
title_short |
A record of atmospheric CO₂ during the last 40,000 years from the Siple Dome, Antarctica ice core |
title_full |
A record of atmospheric CO₂ during the last 40,000 years from the Siple Dome, Antarctica ice core |
title_fullStr |
A record of atmospheric CO₂ during the last 40,000 years from the Siple Dome, Antarctica ice core |
title_full_unstemmed |
A record of atmospheric CO₂ during the last 40,000 years from the Siple Dome, Antarctica ice core |
title_sort |
record of atmospheric co₂ during the last 40,000 years from the siple dome, antarctica ice core |
publisher |
American Geophysical Union |
url |
https://ir.library.oregonstate.edu/concern/articles/7h149v183 |
genre |
Antarc* Antarctic Antarctica EPICA ice core |
genre_facet |
Antarc* Antarctic Antarctica EPICA ice core |
op_relation |
https://ir.library.oregonstate.edu/concern/articles/7h149v183 |
op_rights |
Copyright Not Evaluated |
_version_ |
1810495244299403264 |