The nature of deep overturning and reconfigurations of the silicon cycle across the last deglaciation
Funding: NERC E3 DTP studentship awarded to M. Dumont and NERC Grant (NE/J02371X/1) award to R.S. Ganeshram and L.E. Pichevin. Changes in ocean circulation and the biological carbon pump have been implicated as the drivers behind the rise in atmospheric CO2 across the last deglaciation; however, the...
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/19704 2023-07-02T03:29:43+02:00 The nature of deep overturning and reconfigurations of the silicon cycle across the last deglaciation Dumont, Matthew Declan Pichevin, L. Geibert, W. Crosta, X. Michel, E. Moreton, S. Ganeshram, R. University of St Andrews. School of Earth & Environmental Sciences 2020-03-24 11 application/pdf http://hdl.handle.net/10023/19704 https://doi.org/10.1038/s41467-020-15101-6 eng eng Nature Communications Dumont , M D , Pichevin , L , Geibert , W , Crosta , X , Michel , E , Moreton , S & Ganeshram , R 2020 , ' The nature of deep overturning and reconfigurations of the silicon cycle across the last deglaciation ' , Nature Communications , vol. 11 , 1534 . https://doi.org/10.1038/s41467-020-15101-6 2041-1723 PURE: 266187007 PURE UUID: be5e20ab-b7d5-47fb-a492-74089a35977f Scopus: 85082380118 WOS: 000530024600004 http://hdl.handle.net/10023/19704 https://doi.org/10.1038/s41467-020-15101-6 Copyright © The Author(s) 2020. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. GE Environmental Sciences DAS GE Journal article 2020 ftstandrewserep https://doi.org/10.1038/s41467-020-15101-6 2023-06-13T18:27:43Z Funding: NERC E3 DTP studentship awarded to M. Dumont and NERC Grant (NE/J02371X/1) award to R.S. Ganeshram and L.E. Pichevin. Changes in ocean circulation and the biological carbon pump have been implicated as the drivers behind the rise in atmospheric CO2 across the last deglaciation; however, the processes involved remain uncertain. Previous records have hinted at a partitioning of deep ocean ventilation across the two major intervals of atmospheric CO2 rise, but the consequences of differential ventilation on the Si cycle has not been explored. Here we present three new records of silicon isotopes in diatoms and sponges from the Southern Ocean that together show increased Si supply from deep mixing during the deglaciation with a maximum during the Younger Dryas (YD). We suggest Antarctic sea ice and Atlantic overturning conditions favoured abyssal ocean ventilation at the YD and marked an interval of Si cycle reorganisation. By regulating the strength of the biological pump, the glacial–interglacial shift in the Si cycle may present an important control on Pleistocene CO2 concentrations. Publisher PDF Peer reviewed Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean University of St Andrews: Digital Research Repository Antarctic Southern Ocean Nature Communications 11 1 |
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University of St Andrews: Digital Research Repository |
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ftstandrewserep |
language |
English |
topic |
GE Environmental Sciences DAS GE |
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GE Environmental Sciences DAS GE Dumont, Matthew Declan Pichevin, L. Geibert, W. Crosta, X. Michel, E. Moreton, S. Ganeshram, R. The nature of deep overturning and reconfigurations of the silicon cycle across the last deglaciation |
topic_facet |
GE Environmental Sciences DAS GE |
description |
Funding: NERC E3 DTP studentship awarded to M. Dumont and NERC Grant (NE/J02371X/1) award to R.S. Ganeshram and L.E. Pichevin. Changes in ocean circulation and the biological carbon pump have been implicated as the drivers behind the rise in atmospheric CO2 across the last deglaciation; however, the processes involved remain uncertain. Previous records have hinted at a partitioning of deep ocean ventilation across the two major intervals of atmospheric CO2 rise, but the consequences of differential ventilation on the Si cycle has not been explored. Here we present three new records of silicon isotopes in diatoms and sponges from the Southern Ocean that together show increased Si supply from deep mixing during the deglaciation with a maximum during the Younger Dryas (YD). We suggest Antarctic sea ice and Atlantic overturning conditions favoured abyssal ocean ventilation at the YD and marked an interval of Si cycle reorganisation. By regulating the strength of the biological pump, the glacial–interglacial shift in the Si cycle may present an important control on Pleistocene CO2 concentrations. Publisher PDF Peer reviewed |
author2 |
University of St Andrews. School of Earth & Environmental Sciences |
format |
Article in Journal/Newspaper |
author |
Dumont, Matthew Declan Pichevin, L. Geibert, W. Crosta, X. Michel, E. Moreton, S. Ganeshram, R. |
author_facet |
Dumont, Matthew Declan Pichevin, L. Geibert, W. Crosta, X. Michel, E. Moreton, S. Ganeshram, R. |
author_sort |
Dumont, Matthew Declan |
title |
The nature of deep overturning and reconfigurations of the silicon cycle across the last deglaciation |
title_short |
The nature of deep overturning and reconfigurations of the silicon cycle across the last deglaciation |
title_full |
The nature of deep overturning and reconfigurations of the silicon cycle across the last deglaciation |
title_fullStr |
The nature of deep overturning and reconfigurations of the silicon cycle across the last deglaciation |
title_full_unstemmed |
The nature of deep overturning and reconfigurations of the silicon cycle across the last deglaciation |
title_sort |
nature of deep overturning and reconfigurations of the silicon cycle across the last deglaciation |
publishDate |
2020 |
url |
http://hdl.handle.net/10023/19704 https://doi.org/10.1038/s41467-020-15101-6 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_relation |
Nature Communications Dumont , M D , Pichevin , L , Geibert , W , Crosta , X , Michel , E , Moreton , S & Ganeshram , R 2020 , ' The nature of deep overturning and reconfigurations of the silicon cycle across the last deglaciation ' , Nature Communications , vol. 11 , 1534 . https://doi.org/10.1038/s41467-020-15101-6 2041-1723 PURE: 266187007 PURE UUID: be5e20ab-b7d5-47fb-a492-74089a35977f Scopus: 85082380118 WOS: 000530024600004 http://hdl.handle.net/10023/19704 https://doi.org/10.1038/s41467-020-15101-6 |
op_rights |
Copyright © The Author(s) 2020. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
op_doi |
https://doi.org/10.1038/s41467-020-15101-6 |
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Nature Communications |
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11 |
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