Seawater carbonate ion-[delta]13C systematics and application to glacial-interglacial North Atlantic ocean circulation
Seawater carbonate ion and δ13C are affected by many processes including biology, air–sea exchange, alkalinity change, and mixing between different water masses. Study of modern ocean data shows that deep ocean carbonate ion and δ13C of dissolved inorganic carbon can be used together as useful trace...
Published in: | Earth and Planetary Science Letters |
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Language: | English |
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Online Access: | http://eprints.esc.cam.ac.uk/825/ http://eprints.esc.cam.ac.uk/825/1/Yu_Elderfield_Piotrowski_EPSL__271_2008.pdf http://www.sciencedirect.com/science/article/B6V61-4SBHX6P-5/1/e4f787a336abd26662cdd1abf5bb085a https://doi.org/10.1016/j.epsl.2008.04.010 |
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ftucambridgeesc:oai:eprints.esc.cam.ac.uk:825 2023-05-15T16:29:56+02:00 Seawater carbonate ion-[delta]13C systematics and application to glacial-interglacial North Atlantic ocean circulation Yu, J. Elderfield, H. Piotrowski, A. M. 2008-07 application/pdf http://eprints.esc.cam.ac.uk/825/ http://eprints.esc.cam.ac.uk/825/1/Yu_Elderfield_Piotrowski_EPSL__271_2008.pdf http://www.sciencedirect.com/science/article/B6V61-4SBHX6P-5/1/e4f787a336abd26662cdd1abf5bb085a https://doi.org/10.1016/j.epsl.2008.04.010 en eng http://eprints.esc.cam.ac.uk/825/1/Yu_Elderfield_Piotrowski_EPSL__271_2008.pdf Yu, J. and Elderfield, H. and Piotrowski, A. M. (2008) Seawater carbonate ion-[delta]13C systematics and application to glacial-interglacial North Atlantic ocean circulation. Earth and Planetary Science Letters, 271 (1-4). pp. 209-220. ISSN 0012-821X DOI https://doi.org/10.1016/j.epsl.2008.04.010 <https://doi.org/10.1016/j.epsl.2008.04.010> 01 - Climate Change and Earth-Ocean Atmosphere Systems Article PeerReviewed 2008 ftucambridgeesc https://doi.org/10.1016/j.epsl.2008.04.010 2020-08-27T18:08:43Z Seawater carbonate ion and δ13C are affected by many processes including biology, air–sea exchange, alkalinity change, and mixing between different water masses. Study of modern ocean data shows that deep ocean carbonate ion and δ13C of dissolved inorganic carbon can be used together as useful tracers for deep water mass reconstructions in the past. We present records of deep water carbonate ion concentration ([CO32−]) changes of the North Atlantic Ocean water column since the last glacial, quantitatively reconstructed using benthic foraminiferal boron/calcium (B/Ca) ratios. Records from six cores over 1 to 4 km reveal that the carbonate chemistry of the glacial North Atlantic was more stratified than the modern ocean, with higher [CO32−] by ~ 20–30 μmol kg− 1 at 1–2 km and lower [CO32−] by ~ 20 μmol kg− 1 at sites deeper than 3.5 km, producing an 800 m glacial shoaling of calcite saturation horizon. Comparison with benthic foraminiferal δ13C and var epsilonNd of Fe–Mn oxide leachates shows that the deep glacial waters with low-[CO32−] are consistent with a Southern Ocean source, while those with high-[CO32−] but distinct δ13C chemistry were supplied by two endemic sources, one being the Norwegian–Greenland Sea (NGS). Our carbonate ion results suggest that the glacial boundary between north and south sourced deep waters is at ~2.8 km, significantly deeper than ~ 2.3 km estimated from benthic foraminiferal δ13C. Weakened surface compensation inflow to the NGS promoted cooling and continental ice growth at north high-latitude, and a deeper boundary may reduce atmospheric CO2 sequestration in the deep Atlantic, implying a greater role of other parts of the ocean. Article in Journal/Newspaper Greenland Greenland Sea North Atlantic Southern Ocean University of Cambridge, Department of Earth Sciences: ESC Publications Greenland Southern Ocean Earth and Planetary Science Letters 271 1-4 209 220 |
institution |
Open Polar |
collection |
University of Cambridge, Department of Earth Sciences: ESC Publications |
op_collection_id |
ftucambridgeesc |
language |
English |
topic |
01 - Climate Change and Earth-Ocean Atmosphere Systems |
spellingShingle |
01 - Climate Change and Earth-Ocean Atmosphere Systems Yu, J. Elderfield, H. Piotrowski, A. M. Seawater carbonate ion-[delta]13C systematics and application to glacial-interglacial North Atlantic ocean circulation |
topic_facet |
01 - Climate Change and Earth-Ocean Atmosphere Systems |
description |
Seawater carbonate ion and δ13C are affected by many processes including biology, air–sea exchange, alkalinity change, and mixing between different water masses. Study of modern ocean data shows that deep ocean carbonate ion and δ13C of dissolved inorganic carbon can be used together as useful tracers for deep water mass reconstructions in the past. We present records of deep water carbonate ion concentration ([CO32−]) changes of the North Atlantic Ocean water column since the last glacial, quantitatively reconstructed using benthic foraminiferal boron/calcium (B/Ca) ratios. Records from six cores over 1 to 4 km reveal that the carbonate chemistry of the glacial North Atlantic was more stratified than the modern ocean, with higher [CO32−] by ~ 20–30 μmol kg− 1 at 1–2 km and lower [CO32−] by ~ 20 μmol kg− 1 at sites deeper than 3.5 km, producing an 800 m glacial shoaling of calcite saturation horizon. Comparison with benthic foraminiferal δ13C and var epsilonNd of Fe–Mn oxide leachates shows that the deep glacial waters with low-[CO32−] are consistent with a Southern Ocean source, while those with high-[CO32−] but distinct δ13C chemistry were supplied by two endemic sources, one being the Norwegian–Greenland Sea (NGS). Our carbonate ion results suggest that the glacial boundary between north and south sourced deep waters is at ~2.8 km, significantly deeper than ~ 2.3 km estimated from benthic foraminiferal δ13C. Weakened surface compensation inflow to the NGS promoted cooling and continental ice growth at north high-latitude, and a deeper boundary may reduce atmospheric CO2 sequestration in the deep Atlantic, implying a greater role of other parts of the ocean. |
format |
Article in Journal/Newspaper |
author |
Yu, J. Elderfield, H. Piotrowski, A. M. |
author_facet |
Yu, J. Elderfield, H. Piotrowski, A. M. |
author_sort |
Yu, J. |
title |
Seawater carbonate ion-[delta]13C systematics and application to glacial-interglacial North Atlantic ocean circulation |
title_short |
Seawater carbonate ion-[delta]13C systematics and application to glacial-interglacial North Atlantic ocean circulation |
title_full |
Seawater carbonate ion-[delta]13C systematics and application to glacial-interglacial North Atlantic ocean circulation |
title_fullStr |
Seawater carbonate ion-[delta]13C systematics and application to glacial-interglacial North Atlantic ocean circulation |
title_full_unstemmed |
Seawater carbonate ion-[delta]13C systematics and application to glacial-interglacial North Atlantic ocean circulation |
title_sort |
seawater carbonate ion-[delta]13c systematics and application to glacial-interglacial north atlantic ocean circulation |
publishDate |
2008 |
url |
http://eprints.esc.cam.ac.uk/825/ http://eprints.esc.cam.ac.uk/825/1/Yu_Elderfield_Piotrowski_EPSL__271_2008.pdf http://www.sciencedirect.com/science/article/B6V61-4SBHX6P-5/1/e4f787a336abd26662cdd1abf5bb085a https://doi.org/10.1016/j.epsl.2008.04.010 |
geographic |
Greenland Southern Ocean |
geographic_facet |
Greenland Southern Ocean |
genre |
Greenland Greenland Sea North Atlantic Southern Ocean |
genre_facet |
Greenland Greenland Sea North Atlantic Southern Ocean |
op_relation |
http://eprints.esc.cam.ac.uk/825/1/Yu_Elderfield_Piotrowski_EPSL__271_2008.pdf Yu, J. and Elderfield, H. and Piotrowski, A. M. (2008) Seawater carbonate ion-[delta]13C systematics and application to glacial-interglacial North Atlantic ocean circulation. Earth and Planetary Science Letters, 271 (1-4). pp. 209-220. ISSN 0012-821X DOI https://doi.org/10.1016/j.epsl.2008.04.010 <https://doi.org/10.1016/j.epsl.2008.04.010> |
op_doi |
https://doi.org/10.1016/j.epsl.2008.04.010 |
container_title |
Earth and Planetary Science Letters |
container_volume |
271 |
container_issue |
1-4 |
container_start_page |
209 |
op_container_end_page |
220 |
_version_ |
1766019642539638784 |