Millennial-scale atmospheric CO2 variations during the Marine Isotope Stage 6 period (190–135 ka)
Using new and previously published CO 2 data from the EPICA Dome C ice core (EDC), we reconstruct a new high-resolution record of atmospheric CO 2 during Marine Isotope Stage (MIS) 6 (190 to 135 ka) the penultimate glacial period. Similar to the last glacial cycle, where high-resolution data already...
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ftcopernicus:oai:publications.copernicus.org:cp81851 2023-05-15T13:31:39+02:00 Millennial-scale atmospheric CO2 variations during the Marine Isotope Stage 6 period (190–135 ka) Shin, Jinhwa Nehrbass-Ahles, Christoph Grilli, Roberto Chowdhry Beeman, Jai Parrenin, Frédéric Teste, Grégory Landais, Amaelle Schmidely, Loïc Silva, Lucas Schmitt, Jochen Bereiter, Bernhard Stocker, Thomas F. Fischer, Hubertus Chappellaz, Jérôme 2020-11-14 application/pdf https://doi.org/10.5194/cp-16-2203-2020 https://cp.copernicus.org/articles/16/2203/2020/ eng eng doi:10.5194/cp-16-2203-2020 https://cp.copernicus.org/articles/16/2203/2020/ eISSN: 1814-9332 Text 2020 ftcopernicus https://doi.org/10.5194/cp-16-2203-2020 2020-11-16T17:22:14Z Using new and previously published CO 2 data from the EPICA Dome C ice core (EDC), we reconstruct a new high-resolution record of atmospheric CO 2 during Marine Isotope Stage (MIS) 6 (190 to 135 ka) the penultimate glacial period. Similar to the last glacial cycle, where high-resolution data already exists, our record shows that during longer North Atlantic (NA) stadials, millennial CO 2 variations during MIS 6 are clearly coincident with the bipolar seesaw signal in the Antarctic temperature record. However, during one short stadial in the NA, atmospheric CO 2 variation is small ( ∼5 ppm) and the relationship between temperature variations in EDC and atmospheric CO 2 is unclear. The magnitude of CO 2 increase during Carbon Dioxide Maxima (CDM) is closely related to the NA stadial duration in both MIS 6 and MIS 3 (60–27 ka). This observation implies that during the last two glacials the overall bipolar seesaw coupling of climate and atmospheric CO 2 operated similarly. In addition, similar to the last glacial period, CDM during the earliest MIS 6 show different lags with respect to the corresponding abrupt CH 4 rises, the latter reflecting rapid warming in the Northern Hemisphere (NH). During MIS 6i at around 181.5± 0.3 ka, CDM 6i lags the abrupt warming in the NH by only 240± 320 years. However, during CDM 6iv ( 171.1± 0.2 ka) and CDM 6iii ( 175.4± 0.4 ka) the lag is much longer: 1290± 540 years on average. We speculate that the size of this lag may be related to a larger expansion of carbon-rich, southern-sourced waters into the Northern Hemisphere in MIS 6, providing a larger carbon reservoir that requires more time to be depleted. Text Antarc* Antarctic EPICA ice core North Atlantic Copernicus Publications: E-Journals Antarctic The Antarctic Climate of the Past 16 6 2203 2219 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Using new and previously published CO 2 data from the EPICA Dome C ice core (EDC), we reconstruct a new high-resolution record of atmospheric CO 2 during Marine Isotope Stage (MIS) 6 (190 to 135 ka) the penultimate glacial period. Similar to the last glacial cycle, where high-resolution data already exists, our record shows that during longer North Atlantic (NA) stadials, millennial CO 2 variations during MIS 6 are clearly coincident with the bipolar seesaw signal in the Antarctic temperature record. However, during one short stadial in the NA, atmospheric CO 2 variation is small ( ∼5 ppm) and the relationship between temperature variations in EDC and atmospheric CO 2 is unclear. The magnitude of CO 2 increase during Carbon Dioxide Maxima (CDM) is closely related to the NA stadial duration in both MIS 6 and MIS 3 (60–27 ka). This observation implies that during the last two glacials the overall bipolar seesaw coupling of climate and atmospheric CO 2 operated similarly. In addition, similar to the last glacial period, CDM during the earliest MIS 6 show different lags with respect to the corresponding abrupt CH 4 rises, the latter reflecting rapid warming in the Northern Hemisphere (NH). During MIS 6i at around 181.5± 0.3 ka, CDM 6i lags the abrupt warming in the NH by only 240± 320 years. However, during CDM 6iv ( 171.1± 0.2 ka) and CDM 6iii ( 175.4± 0.4 ka) the lag is much longer: 1290± 540 years on average. We speculate that the size of this lag may be related to a larger expansion of carbon-rich, southern-sourced waters into the Northern Hemisphere in MIS 6, providing a larger carbon reservoir that requires more time to be depleted. |
format |
Text |
author |
Shin, Jinhwa Nehrbass-Ahles, Christoph Grilli, Roberto Chowdhry Beeman, Jai Parrenin, Frédéric Teste, Grégory Landais, Amaelle Schmidely, Loïc Silva, Lucas Schmitt, Jochen Bereiter, Bernhard Stocker, Thomas F. Fischer, Hubertus Chappellaz, Jérôme |
spellingShingle |
Shin, Jinhwa Nehrbass-Ahles, Christoph Grilli, Roberto Chowdhry Beeman, Jai Parrenin, Frédéric Teste, Grégory Landais, Amaelle Schmidely, Loïc Silva, Lucas Schmitt, Jochen Bereiter, Bernhard Stocker, Thomas F. Fischer, Hubertus Chappellaz, Jérôme Millennial-scale atmospheric CO2 variations during the Marine Isotope Stage 6 period (190–135 ka) |
author_facet |
Shin, Jinhwa Nehrbass-Ahles, Christoph Grilli, Roberto Chowdhry Beeman, Jai Parrenin, Frédéric Teste, Grégory Landais, Amaelle Schmidely, Loïc Silva, Lucas Schmitt, Jochen Bereiter, Bernhard Stocker, Thomas F. Fischer, Hubertus Chappellaz, Jérôme |
author_sort |
Shin, Jinhwa |
title |
Millennial-scale atmospheric CO2 variations during the Marine Isotope Stage 6 period (190–135 ka) |
title_short |
Millennial-scale atmospheric CO2 variations during the Marine Isotope Stage 6 period (190–135 ka) |
title_full |
Millennial-scale atmospheric CO2 variations during the Marine Isotope Stage 6 period (190–135 ka) |
title_fullStr |
Millennial-scale atmospheric CO2 variations during the Marine Isotope Stage 6 period (190–135 ka) |
title_full_unstemmed |
Millennial-scale atmospheric CO2 variations during the Marine Isotope Stage 6 period (190–135 ka) |
title_sort |
millennial-scale atmospheric co2 variations during the marine isotope stage 6 period (190–135 ka) |
publishDate |
2020 |
url |
https://doi.org/10.5194/cp-16-2203-2020 https://cp.copernicus.org/articles/16/2203/2020/ |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic EPICA ice core North Atlantic |
genre_facet |
Antarc* Antarctic EPICA ice core North Atlantic |
op_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-16-2203-2020 https://cp.copernicus.org/articles/16/2203/2020/ |
op_doi |
https://doi.org/10.5194/cp-16-2203-2020 |
container_title |
Climate of the Past |
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16 |
container_issue |
6 |
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2203 |
op_container_end_page |
2219 |
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1766019829639151616 |