Responses of the deep ocean carbonate system to carbon reorganization during the last glacial-interglacial cycle
We present new deep water carbonate ion concentration ([CO32−]) records, reconstructed using Cibicidoides wuellerstorfi B/Ca, for one core from Caribbean Basin (water depth = 3623 m, sill depth = 1.8 km) and three cores located at 2.3–4.3 km water depth from the equatorial Pacific Ocean during the L...
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2013
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/responses-of-the-deep-ocean-carbonate-system-to-carbon-reorganization-during-the-last-glacialinterglacial-cycle(e036abaa-e881-442d-a242-f027c7f59447).html https://doi.org/10.1016/j.quascirev.2013.06.020 http://www.sciencedirect.com/science/article/pii/S0277379113002400 |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/e036abaa-e881-442d-a242-f027c7f59447 2023-05-15T17:36:52+02:00 Responses of the deep ocean carbonate system to carbon reorganization during the last glacial-interglacial cycle Yu, J Anderson, R. F. Jin, Z. Rae, James William Buchanan Opdyke, B. N. Eggins, S. 2013-09-15 https://risweb.st-andrews.ac.uk/portal/en/researchoutput/responses-of-the-deep-ocean-carbonate-system-to-carbon-reorganization-during-the-last-glacialinterglacial-cycle(e036abaa-e881-442d-a242-f027c7f59447).html https://doi.org/10.1016/j.quascirev.2013.06.020 http://www.sciencedirect.com/science/article/pii/S0277379113002400 eng eng info:eu-repo/semantics/restrictedAccess Yu , J , Anderson , R F , Jin , Z , Rae , J W B , Opdyke , B N & Eggins , S 2013 , ' Responses of the deep ocean carbonate system to carbon reorganization during the last glacial-interglacial cycle ' , Quaternary Science Reviews , vol. 76 , pp. 39-52 . https://doi.org/10.1016/j.quascirev.2013.06.020 article 2013 ftunstandrewcris https://doi.org/10.1016/j.quascirev.2013.06.020 2021-12-26T14:23:12Z We present new deep water carbonate ion concentration ([CO32−]) records, reconstructed using Cibicidoides wuellerstorfi B/Ca, for one core from Caribbean Basin (water depth = 3623 m, sill depth = 1.8 km) and three cores located at 2.3–4.3 km water depth from the equatorial Pacific Ocean during the Last Glacial–interglacial cycle. The pattern of deep water [CO32−] in the Caribbean Basin roughly mirrors that of atmospheric CO2, reflecting a dominant influence from preformed [CO32−] in the North Atlantic Ocean. Compared to the amplitude of ∼65 μmol/kg in the deep Caribbean Basin, deep water [CO32−] in the equatorial Pacific Ocean has varied by no more than ∼15 μmol/kg due to effective buffering of CaCO3 on deep-sea pH in the Pacific Ocean. Our results suggest little change in the global mean deep ocean [CO32−] between the Last Glacial Maximum (LGM) and the Late Holocene. The three records from the Pacific Ocean show long-term increases in [CO32−] by ∼7 μmol/kg from Marine Isotope Stage (MIS) 5c to mid MIS 3, consistent with the response of the deep ocean carbonate system to a decline in neritic carbonate production associated with ∼60 m drop in sea-level (the “coral-reef” hypothesis). Superimposed upon the long-term trend, deep water [CO32−] in the Pacific Ocean displays transient changes, which decouple with δ13C in the same cores, at the start and end of MIS 4. These changes in [CO32−] and δ13C are consistent with what would be expected from vertical nutrient fractionation and carbonate compensation. The observed ∼4 μmol/kg [CO32−] decline in the two Pacific cores at >3.4 km water depth from MIS 3 to the LGM indicate further strengthening of deep ocean stratification, which contributed to the final step of atmospheric CO2 drawdown during the last glaciation. The striking similarity between deep water [CO32−] and 230Th-normalized CaCO3 flux at two adjacent sites from the central equatorial Pacific Ocean provides convincing evidence that deep-sea carbonate dissolution dominantly controlled CaCO3 preservation at ... Article in Journal/Newspaper North Atlantic University of St Andrews: Research Portal Pacific Quaternary Science Reviews 76 39 52 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
description |
We present new deep water carbonate ion concentration ([CO32−]) records, reconstructed using Cibicidoides wuellerstorfi B/Ca, for one core from Caribbean Basin (water depth = 3623 m, sill depth = 1.8 km) and three cores located at 2.3–4.3 km water depth from the equatorial Pacific Ocean during the Last Glacial–interglacial cycle. The pattern of deep water [CO32−] in the Caribbean Basin roughly mirrors that of atmospheric CO2, reflecting a dominant influence from preformed [CO32−] in the North Atlantic Ocean. Compared to the amplitude of ∼65 μmol/kg in the deep Caribbean Basin, deep water [CO32−] in the equatorial Pacific Ocean has varied by no more than ∼15 μmol/kg due to effective buffering of CaCO3 on deep-sea pH in the Pacific Ocean. Our results suggest little change in the global mean deep ocean [CO32−] between the Last Glacial Maximum (LGM) and the Late Holocene. The three records from the Pacific Ocean show long-term increases in [CO32−] by ∼7 μmol/kg from Marine Isotope Stage (MIS) 5c to mid MIS 3, consistent with the response of the deep ocean carbonate system to a decline in neritic carbonate production associated with ∼60 m drop in sea-level (the “coral-reef” hypothesis). Superimposed upon the long-term trend, deep water [CO32−] in the Pacific Ocean displays transient changes, which decouple with δ13C in the same cores, at the start and end of MIS 4. These changes in [CO32−] and δ13C are consistent with what would be expected from vertical nutrient fractionation and carbonate compensation. The observed ∼4 μmol/kg [CO32−] decline in the two Pacific cores at >3.4 km water depth from MIS 3 to the LGM indicate further strengthening of deep ocean stratification, which contributed to the final step of atmospheric CO2 drawdown during the last glaciation. The striking similarity between deep water [CO32−] and 230Th-normalized CaCO3 flux at two adjacent sites from the central equatorial Pacific Ocean provides convincing evidence that deep-sea carbonate dissolution dominantly controlled CaCO3 preservation at ... |
format |
Article in Journal/Newspaper |
author |
Yu, J Anderson, R. F. Jin, Z. Rae, James William Buchanan Opdyke, B. N. Eggins, S. |
spellingShingle |
Yu, J Anderson, R. F. Jin, Z. Rae, James William Buchanan Opdyke, B. N. Eggins, S. Responses of the deep ocean carbonate system to carbon reorganization during the last glacial-interglacial cycle |
author_facet |
Yu, J Anderson, R. F. Jin, Z. Rae, James William Buchanan Opdyke, B. N. Eggins, S. |
author_sort |
Yu, J |
title |
Responses of the deep ocean carbonate system to carbon reorganization during the last glacial-interglacial cycle |
title_short |
Responses of the deep ocean carbonate system to carbon reorganization during the last glacial-interglacial cycle |
title_full |
Responses of the deep ocean carbonate system to carbon reorganization during the last glacial-interglacial cycle |
title_fullStr |
Responses of the deep ocean carbonate system to carbon reorganization during the last glacial-interglacial cycle |
title_full_unstemmed |
Responses of the deep ocean carbonate system to carbon reorganization during the last glacial-interglacial cycle |
title_sort |
responses of the deep ocean carbonate system to carbon reorganization during the last glacial-interglacial cycle |
publishDate |
2013 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/responses-of-the-deep-ocean-carbonate-system-to-carbon-reorganization-during-the-last-glacialinterglacial-cycle(e036abaa-e881-442d-a242-f027c7f59447).html https://doi.org/10.1016/j.quascirev.2013.06.020 http://www.sciencedirect.com/science/article/pii/S0277379113002400 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Yu , J , Anderson , R F , Jin , Z , Rae , J W B , Opdyke , B N & Eggins , S 2013 , ' Responses of the deep ocean carbonate system to carbon reorganization during the last glacial-interglacial cycle ' , Quaternary Science Reviews , vol. 76 , pp. 39-52 . https://doi.org/10.1016/j.quascirev.2013.06.020 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2013.06.020 |
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Quaternary Science Reviews |
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76 |
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39 |
op_container_end_page |
52 |
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1766136501695938560 |