Deep-sea coral evidence for lower Southern Ocean surface nitrate concentrations during the last ice age
The Southern Ocean regulates the ocean’s biological sequestration of CO 2 and is widely suspected to underlie much of the ice age decline in atmospheric CO 2 concentration, but the specific changes in the region are debated. While more complete drawdown of surface nutrients by phytoplankton during t...
Published in: | Proceedings of the National Academy of Sciences |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2017
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Online Access: | https://hdl.handle.net/1983/f33afe39-c1d6-4fd0-a2fa-ba5d0bb853c7 https://research-information.bris.ac.uk/en/publications/f33afe39-c1d6-4fd0-a2fa-ba5d0bb853c7 https://doi.org/10.1073/pnas.1615718114 https://research-information.bris.ac.uk/ws/files/104278719/Wang_2017_PNAS.pdf http://www.scopus.com/inward/record.url?scp=85016408889&partnerID=8YFLogxK |
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ftubristolcris:oai:research-information.bris.ac.uk:publications/f33afe39-c1d6-4fd0-a2fa-ba5d0bb853c7 2024-05-19T07:32:14+00:00 Deep-sea coral evidence for lower Southern Ocean surface nitrate concentrations during the last ice age Wang, Xingchen T. Sigman, Daniel M. Prokopenko, Maria Adkins, Jess F. Robinson, Laura Hines, Sophia K Chai, Junyi Martinez Garcia, alfredo Chen, Tianyu Haug, Gerald H. 2017-03-28 application/pdf https://hdl.handle.net/1983/f33afe39-c1d6-4fd0-a2fa-ba5d0bb853c7 https://research-information.bris.ac.uk/en/publications/f33afe39-c1d6-4fd0-a2fa-ba5d0bb853c7 https://doi.org/10.1073/pnas.1615718114 https://research-information.bris.ac.uk/ws/files/104278719/Wang_2017_PNAS.pdf http://www.scopus.com/inward/record.url?scp=85016408889&partnerID=8YFLogxK eng eng https://research-information.bris.ac.uk/en/publications/f33afe39-c1d6-4fd0-a2fa-ba5d0bb853c7 info:eu-repo/semantics/openAccess Wang , X T , Sigman , D M , Prokopenko , M , Adkins , J F , Robinson , L , Hines , S K , Chai , J , Martinez Garcia , A , Chen , T & Haug , G H 2017 , ' Deep-sea coral evidence for lower Southern Ocean surface nitrate concentrations during the last ice age ' , Proceedings of the National Academy of Sciences of the United States of America , vol. 114 , no. 13 , pp. 3352–3357 . https://doi.org/10.1073/pnas.1615718114 Southern Ocean nutrient consumption atmospheric CO2 ice ages article 2017 ftubristolcris https://doi.org/10.1073/pnas.1615718114 2024-04-23T23:53:50Z The Southern Ocean regulates the ocean’s biological sequestration of CO 2 and is widely suspected to underlie much of the ice age decline in atmospheric CO 2 concentration, but the specific changes in the region are debated. While more complete drawdown of surface nutrients by phytoplankton during the ice ages is supported by some sediment core-based measurements, the use of different proxies in different regions has precluded a unified view of Southern Ocean biogeochemical change. Here, we report measurements of the 15 N/ 14 N of fossil-bound organic matter in the stony deep-sea coral Desmophyllum dianthus , a new tool for reconstructing surface ocean nutrient conditions. The central robust observation is of higher 15 N/ 14 N across the Southern Ocean during the Last Glacial Maximum (LGM), 18-25,000 years ago. These data suggest a reduced summer surface nitrate concentration in both the Antarctic and Subantarctic Zones during the LGM, with little surface nitrate transport between them. After the ice age, the increase in Antarctic surface nitrate occurred through the deglaciation and continued in the Holocene. The rise in Subantarctic surface nitrate appears to have had both early deglacial and late deglacial/Holocene components, preliminarily attributed to the end of Subantarctic iron fertilization and increasing nitrate input from the Antarctic, respectively. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean University of Bristol: Bristol Research Proceedings of the National Academy of Sciences 114 13 3352 3357 |
institution |
Open Polar |
collection |
University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
topic |
Southern Ocean nutrient consumption atmospheric CO2 ice ages |
spellingShingle |
Southern Ocean nutrient consumption atmospheric CO2 ice ages Wang, Xingchen T. Sigman, Daniel M. Prokopenko, Maria Adkins, Jess F. Robinson, Laura Hines, Sophia K Chai, Junyi Martinez Garcia, alfredo Chen, Tianyu Haug, Gerald H. Deep-sea coral evidence for lower Southern Ocean surface nitrate concentrations during the last ice age |
topic_facet |
Southern Ocean nutrient consumption atmospheric CO2 ice ages |
description |
The Southern Ocean regulates the ocean’s biological sequestration of CO 2 and is widely suspected to underlie much of the ice age decline in atmospheric CO 2 concentration, but the specific changes in the region are debated. While more complete drawdown of surface nutrients by phytoplankton during the ice ages is supported by some sediment core-based measurements, the use of different proxies in different regions has precluded a unified view of Southern Ocean biogeochemical change. Here, we report measurements of the 15 N/ 14 N of fossil-bound organic matter in the stony deep-sea coral Desmophyllum dianthus , a new tool for reconstructing surface ocean nutrient conditions. The central robust observation is of higher 15 N/ 14 N across the Southern Ocean during the Last Glacial Maximum (LGM), 18-25,000 years ago. These data suggest a reduced summer surface nitrate concentration in both the Antarctic and Subantarctic Zones during the LGM, with little surface nitrate transport between them. After the ice age, the increase in Antarctic surface nitrate occurred through the deglaciation and continued in the Holocene. The rise in Subantarctic surface nitrate appears to have had both early deglacial and late deglacial/Holocene components, preliminarily attributed to the end of Subantarctic iron fertilization and increasing nitrate input from the Antarctic, respectively. |
format |
Article in Journal/Newspaper |
author |
Wang, Xingchen T. Sigman, Daniel M. Prokopenko, Maria Adkins, Jess F. Robinson, Laura Hines, Sophia K Chai, Junyi Martinez Garcia, alfredo Chen, Tianyu Haug, Gerald H. |
author_facet |
Wang, Xingchen T. Sigman, Daniel M. Prokopenko, Maria Adkins, Jess F. Robinson, Laura Hines, Sophia K Chai, Junyi Martinez Garcia, alfredo Chen, Tianyu Haug, Gerald H. |
author_sort |
Wang, Xingchen T. |
title |
Deep-sea coral evidence for lower Southern Ocean surface nitrate concentrations during the last ice age |
title_short |
Deep-sea coral evidence for lower Southern Ocean surface nitrate concentrations during the last ice age |
title_full |
Deep-sea coral evidence for lower Southern Ocean surface nitrate concentrations during the last ice age |
title_fullStr |
Deep-sea coral evidence for lower Southern Ocean surface nitrate concentrations during the last ice age |
title_full_unstemmed |
Deep-sea coral evidence for lower Southern Ocean surface nitrate concentrations during the last ice age |
title_sort |
deep-sea coral evidence for lower southern ocean surface nitrate concentrations during the last ice age |
publishDate |
2017 |
url |
https://hdl.handle.net/1983/f33afe39-c1d6-4fd0-a2fa-ba5d0bb853c7 https://research-information.bris.ac.uk/en/publications/f33afe39-c1d6-4fd0-a2fa-ba5d0bb853c7 https://doi.org/10.1073/pnas.1615718114 https://research-information.bris.ac.uk/ws/files/104278719/Wang_2017_PNAS.pdf http://www.scopus.com/inward/record.url?scp=85016408889&partnerID=8YFLogxK |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Wang , X T , Sigman , D M , Prokopenko , M , Adkins , J F , Robinson , L , Hines , S K , Chai , J , Martinez Garcia , A , Chen , T & Haug , G H 2017 , ' Deep-sea coral evidence for lower Southern Ocean surface nitrate concentrations during the last ice age ' , Proceedings of the National Academy of Sciences of the United States of America , vol. 114 , no. 13 , pp. 3352–3357 . https://doi.org/10.1073/pnas.1615718114 |
op_relation |
https://research-information.bris.ac.uk/en/publications/f33afe39-c1d6-4fd0-a2fa-ba5d0bb853c7 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1073/pnas.1615718114 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
114 |
container_issue |
13 |
container_start_page |
3352 |
op_container_end_page |
3357 |
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1799470220024217600 |