Late Pliocene Marine pCO2 Reconstructions From the Subarctic Pacific Ocean
The development of large ice-sheets across the Northern Hemisphere during the late Pliocene and the emergence of the glacial-interglacial cycles that punctuate the Quaternary mark a significant threshold in Earth's climate history. Although a number of different mechanisms have been proposed to...
Published in: | Paleoceanography and Paleoclimatology |
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Online Access: | https://doi.org/10.1029/2017PA003296 https://nottingham-repository.worktribe.com/file/929243/1/Pliocene_carbon_v3.pdf https://nottingham-repository.worktribe.com/output/929243 |
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ftunnottinghamrr:oai:nottingham-repository.worktribe.com:929243 2024-09-09T20:10:41+00:00 Late Pliocene Marine pCO2 Reconstructions From the Subarctic Pacific Ocean Swann, George E.A. Kendrick, Christopher P. Dickson, Alexander J. Worne, Savannah 2018-04-27 https://doi.org/10.1029/2017PA003296 https://nottingham-repository.worktribe.com/file/929243/1/Pliocene_carbon_v3.pdf https://nottingham-repository.worktribe.com/output/929243 unknown Wiley https://nottingham-repository.worktribe.com/output/929243 Paleoceanography and Paleoclimatology Volume 33 Issue 5 Pagination 457-469 doi:https://doi.org/10.1029/2017PA003296 https://nottingham-repository.worktribe.com/file/929243/1/Pliocene_carbon_v3.pdf 2572-4517 doi:10.1029/2017PA003296 openAccess Journal Article acceptedVersion 2018 ftunnottinghamrr https://doi.org/10.1029/2017PA003296 2024-06-17T14:10:03Z The development of large ice-sheets across the Northern Hemisphere during the late Pliocene and the emergence of the glacial-interglacial cycles that punctuate the Quaternary mark a significant threshold in Earth's climate history. Although a number of different mechanisms have been proposed to initiate this cooling and the onset of major Northern Hemisphere glaciation, reductions in atmospheric concentrations of CO2 likely played a key role. The emergence of a stratified (halocline) water column in the subarctic north-west Pacific Ocean at 2.73 Ma has often been interpreted as an event which would have limited oceanic ventilation of CO2 to the atmosphere, thereby helping to cool the global climate system. Here, diatom carbon isotopes (δ13Cdiatom) are used to reconstruct changes in regional carbon dynamics through this interval. Results show that the development of a salinity stratification did not fundamental alter the net oceanic/atmospheric flux of CO2 in the subarctic north-west Pacific Ocean through the late Pliocene/early Quaternary. These results provide further insights into the long-term controls on global carbon cycling and the role of the subarctic Pacific Ocean in instigating global climatic changes. Article in Journal/Newspaper Subarctic University of Nottingham: Repository@Nottingham Pacific Paleoceanography and Paleoclimatology 33 5 457 469 |
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University of Nottingham: Repository@Nottingham |
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ftunnottinghamrr |
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description |
The development of large ice-sheets across the Northern Hemisphere during the late Pliocene and the emergence of the glacial-interglacial cycles that punctuate the Quaternary mark a significant threshold in Earth's climate history. Although a number of different mechanisms have been proposed to initiate this cooling and the onset of major Northern Hemisphere glaciation, reductions in atmospheric concentrations of CO2 likely played a key role. The emergence of a stratified (halocline) water column in the subarctic north-west Pacific Ocean at 2.73 Ma has often been interpreted as an event which would have limited oceanic ventilation of CO2 to the atmosphere, thereby helping to cool the global climate system. Here, diatom carbon isotopes (δ13Cdiatom) are used to reconstruct changes in regional carbon dynamics through this interval. Results show that the development of a salinity stratification did not fundamental alter the net oceanic/atmospheric flux of CO2 in the subarctic north-west Pacific Ocean through the late Pliocene/early Quaternary. These results provide further insights into the long-term controls on global carbon cycling and the role of the subarctic Pacific Ocean in instigating global climatic changes. |
format |
Article in Journal/Newspaper |
author |
Swann, George E.A. Kendrick, Christopher P. Dickson, Alexander J. Worne, Savannah |
spellingShingle |
Swann, George E.A. Kendrick, Christopher P. Dickson, Alexander J. Worne, Savannah Late Pliocene Marine pCO2 Reconstructions From the Subarctic Pacific Ocean |
author_facet |
Swann, George E.A. Kendrick, Christopher P. Dickson, Alexander J. Worne, Savannah |
author_sort |
Swann, George E.A. |
title |
Late Pliocene Marine pCO2 Reconstructions From the Subarctic Pacific Ocean |
title_short |
Late Pliocene Marine pCO2 Reconstructions From the Subarctic Pacific Ocean |
title_full |
Late Pliocene Marine pCO2 Reconstructions From the Subarctic Pacific Ocean |
title_fullStr |
Late Pliocene Marine pCO2 Reconstructions From the Subarctic Pacific Ocean |
title_full_unstemmed |
Late Pliocene Marine pCO2 Reconstructions From the Subarctic Pacific Ocean |
title_sort |
late pliocene marine pco2 reconstructions from the subarctic pacific ocean |
publisher |
Wiley |
publishDate |
2018 |
url |
https://doi.org/10.1029/2017PA003296 https://nottingham-repository.worktribe.com/file/929243/1/Pliocene_carbon_v3.pdf https://nottingham-repository.worktribe.com/output/929243 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Subarctic |
genre_facet |
Subarctic |
op_relation |
https://nottingham-repository.worktribe.com/output/929243 Paleoceanography and Paleoclimatology Volume 33 Issue 5 Pagination 457-469 doi:https://doi.org/10.1029/2017PA003296 https://nottingham-repository.worktribe.com/file/929243/1/Pliocene_carbon_v3.pdf 2572-4517 doi:10.1029/2017PA003296 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1029/2017PA003296 |
container_title |
Paleoceanography and Paleoclimatology |
container_volume |
33 |
container_issue |
5 |
container_start_page |
457 |
op_container_end_page |
469 |
_version_ |
1809945119884836864 |