Constraint of the CO2 rise by new atmospheric carbon isotopic measurements during the last deglaciation
The causes of the ∼80 ppmv increase of atmospheric carbon dioxide (CO2) during the last glacial‐interglacial climatic transition remain debated. We analyzed the parallel evolution of CO2 and its stable carbon isotopic ratio (δ13CO2) in the European Project for Ice Coring in Antarctica (EPICA) Dome C...
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| Veröffentlicht in: | Global biogeochemical cycles 2010-06, Vol.24 (2), p.n/a |
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| creator | Lourantou, Anna Lavrič, Jošt V. Köhler, Peter Barnola, Jean-Marc Paillard, Didier Michel, Elisabeth Raynaud, Dominique Chappellaz, Jérôme |
| description | The causes of the ∼80 ppmv increase of atmospheric carbon dioxide (CO2) during the last glacial‐interglacial climatic transition remain debated. We analyzed the parallel evolution of CO2 and its stable carbon isotopic ratio (δ13CO2) in the European Project for Ice Coring in Antarctica (EPICA) Dome C ice core to bring additional constraints. Agreeing well but largely improving the Taylor Dome ice core record of lower resolution, our δ13CO2 record is characterized by a W shape, with two negative δ13CO2 excursions of 0.5‰ during Heinrich 1 and Younger Dryas events, bracketing a positive δ13CO2 peak during the Bølling/Allerød warm period. The comparison with marine records and the outputs of two C cycle box models suggest that changes in Southern Ocean ventilation drove most of the CO2 increase, with additional contributions from marine productivity changes on the initial CO2 rise and δ13CO2 decline and from rapid vegetation buildup during the CO2 plateau of the Bølling/Allerød. |
| doi_str_mv | 10.1029/2009GB003545 |
| format | Article |
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We analyzed the parallel evolution of CO2 and its stable carbon isotopic ratio (δ13CO2) in the European Project for Ice Coring in Antarctica (EPICA) Dome C ice core to bring additional constraints. Agreeing well but largely improving the Taylor Dome ice core record of lower resolution, our δ13CO2 record is characterized by a W shape, with two negative δ13CO2 excursions of 0.5‰ during Heinrich 1 and Younger Dryas events, bracketing a positive δ13CO2 peak during the Bølling/Allerød warm period. The comparison with marine records and the outputs of two C cycle box models suggest that changes in Southern Ocean ventilation drove most of the CO2 increase, with additional contributions from marine productivity changes on the initial CO2 rise and δ13CO2 decline and from rapid vegetation buildup during the CO2 plateau of the Bølling/Allerød.</description><identifier>ISSN: 0886-6236</identifier><identifier>EISSN: 1944-9224</identifier><identifier>EISSN: 1944-8224</identifier><identifier>DOI: 10.1029/2009GB003545</identifier><identifier>CODEN: GBCYEP</identifier><language>eng</language><publisher>Washington, DC: Blackwell Publishing Ltd</publisher><subject>Animal and plant ecology ; Animal, plant and microbial ecology ; Biological and medical sciences ; C cycle ; Carbon ; Carbon dioxide ; Climate change ; Cryosphere ; Deglaciation ; Earth ; Earth Sciences ; Earth, ocean, space ; Exact sciences and technology ; Fundamental and applied biological sciences. 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Cycles</addtitle><description>The causes of the ∼80 ppmv increase of atmospheric carbon dioxide (CO2) during the last glacial‐interglacial climatic transition remain debated. We analyzed the parallel evolution of CO2 and its stable carbon isotopic ratio (δ13CO2) in the European Project for Ice Coring in Antarctica (EPICA) Dome C ice core to bring additional constraints. Agreeing well but largely improving the Taylor Dome ice core record of lower resolution, our δ13CO2 record is characterized by a W shape, with two negative δ13CO2 excursions of 0.5‰ during Heinrich 1 and Younger Dryas events, bracketing a positive δ13CO2 peak during the Bølling/Allerød warm period. The comparison with marine records and the outputs of two C cycle box models suggest that changes in Southern Ocean ventilation drove most of the CO2 increase, with additional contributions from marine productivity changes on the initial CO2 rise and δ13CO2 decline and from rapid vegetation buildup during the CO2 plateau of the Bølling/Allerød.</description><subject>Animal and plant ecology</subject><subject>Animal, plant and microbial ecology</subject><subject>Biological and medical sciences</subject><subject>C cycle</subject><subject>Carbon</subject><subject>Carbon dioxide</subject><subject>Climate change</subject><subject>Cryosphere</subject><subject>Deglaciation</subject><subject>Earth</subject><subject>Earth Sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Fundamental and applied biological sciences. 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Cycles</addtitle><date>2010-06</date><risdate>2010</risdate><volume>24</volume><issue>2</issue><epage>n/a</epage><issn>0886-6236</issn><eissn>1944-9224</eissn><eissn>1944-8224</eissn><coden>GBCYEP</coden><abstract>The causes of the ∼80 ppmv increase of atmospheric carbon dioxide (CO2) during the last glacial‐interglacial climatic transition remain debated. We analyzed the parallel evolution of CO2 and its stable carbon isotopic ratio (δ13CO2) in the European Project for Ice Coring in Antarctica (EPICA) Dome C ice core to bring additional constraints. Agreeing well but largely improving the Taylor Dome ice core record of lower resolution, our δ13CO2 record is characterized by a W shape, with two negative δ13CO2 excursions of 0.5‰ during Heinrich 1 and Younger Dryas events, bracketing a positive δ13CO2 peak during the Bølling/Allerød warm period. The comparison with marine records and the outputs of two C cycle box models suggest that changes in Southern Ocean ventilation drove most of the CO2 increase, with additional contributions from marine productivity changes on the initial CO2 rise and δ13CO2 decline and from rapid vegetation buildup during the CO2 plateau of the Bølling/Allerød.</abstract><cop>Washington, DC</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1029/2009GB003545</doi><tpages>15</tpages><orcidid>https://orcid.org/0000-0001-7810-8888</orcidid><orcidid>https://orcid.org/0000-0002-9995-2794</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Animal and plant ecology Animal, plant and microbial ecology Biological and medical sciences C cycle Carbon Carbon dioxide Climate change Cryosphere Deglaciation Earth Earth Sciences Earth, ocean, space Exact sciences and technology Fundamental and applied biological sciences. Psychology General aspects Geobiology Geochemistry Glaciology ice cores Marine Oceanography paleoclimate Paleoclimate science Paleontology Sciences of the Universe Synecology |
| title | Constraint of the CO2 rise by new atmospheric carbon isotopic measurements during the last deglaciation |
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