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...
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| Format: | Article |
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Wiley
2018
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| Online Access: | https://eprints.nottingham.ac.uk/51500/ |
| _version_ | 1848798510580760576 |
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| author | Swann, G.E.A. Kendrick, C.P. Dickson, A.J. Worne, Savannah |
| author_facet | Swann, G.E.A. Kendrick, C.P. Dickson, A.J. Worne, Savannah |
| author_sort | Swann, G.E.A. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| 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. |
| first_indexed | 2025-11-14T20:20:55Z |
| format | Article |
| id | nottingham-51500 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T20:20:55Z |
| publishDate | 2018 |
| publisher | Wiley |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-515002020-05-04T19:34:04Z https://eprints.nottingham.ac.uk/51500/ Late Pliocene marine pCO2 reconstructions from the Subarctic Pacific Ocean Swann, G.E.A. Kendrick, C.P. Dickson, A.J. Worne, Savannah 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. Wiley 2018-04-27 Article PeerReviewed Swann, G.E.A., Kendrick, C.P., Dickson, A.J. and Worne, Savannah (2018) Late Pliocene marine pCO2 reconstructions from the Subarctic Pacific Ocean. Paleoceanography and Paleoclimatology . ISSN 2572-4525 https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2017PA003296 doi:10.1029/2017PA003296 doi:10.1029/2017PA003296 |
| spellingShingle | Swann, G.E.A. Kendrick, C.P. Dickson, A.J. Worne, Savannah Late Pliocene marine pCO2 reconstructions from the Subarctic Pacific Ocean |
| title | 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_short | Late Pliocene marine pCO2 reconstructions from the Subarctic Pacific Ocean |
| title_sort | late pliocene marine pco2 reconstructions from the subarctic pacific ocean |
| url | https://eprints.nottingham.ac.uk/51500/ https://eprints.nottingham.ac.uk/51500/ https://eprints.nottingham.ac.uk/51500/ |