A synthesis of marine sediment core δ 13 C data over the last 150 000 years
The isotopic composition of carbon, δ 13 C, in seawater is used in reconstructions of ocean circulation, marine productivity, air-sea gas exchange, and biosphere carbon storage. Here, a synthesis of δ 13 C measurements taken from foraminifera in marine sediment cores over the last 150 000 years is p...
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ftdoajarticles:oai:doaj.org/article:319c3ec8e5024996baf1144389ba131c 2023-05-15T17:36:55+02:00 A synthesis of marine sediment core δ 13 C data over the last 150 000 years R. E. M. Rickaby N. R. Edwards G. M. Henderson S. Crowhurst B. A. A. Hoogakker K. I. C. Oliver H. Elderfield 2010-10-01T00:00:00Z https://doi.org/10.5194/cp-6-645-2010 https://doaj.org/article/319c3ec8e5024996baf1144389ba131c EN eng Copernicus Publications http://www.clim-past.net/6/645/2010/cp-6-645-2010.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-6-645-2010 1814-9324 1814-9332 https://doaj.org/article/319c3ec8e5024996baf1144389ba131c Climate of the Past, Vol 6, Iss 5, Pp 645-673 (2010) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2010 ftdoajarticles https://doi.org/10.5194/cp-6-645-2010 2023-01-08T01:38:16Z The isotopic composition of carbon, δ 13 C, in seawater is used in reconstructions of ocean circulation, marine productivity, air-sea gas exchange, and biosphere carbon storage. Here, a synthesis of δ 13 C measurements taken from foraminifera in marine sediment cores over the last 150 000 years is presented. The dataset comprises previously published and unpublished data from benthic and planktonic records throughout the global ocean. Data are placed on a common δ 18 O age scale suitable for examining orbital timescale variability but not millennial events, which are removed by a 10 ka filter. Error estimates account for the resolution and scatter of the original data, and uncertainty in the relationship between δ 13 C of calcite and of dissolved inorganic carbon (DIC) in seawater. This will assist comparison with δ 13 C of DIC output from models, which can be further improved using model outputs such as temperature, DIC concentration, and alkalinity to improve estimates of fractionation during calcite formation. High global deep ocean δ 13 C, indicating isotopically heavy carbon, is obtained during Marine Isotope Stages (MIS) 1, 3, 5a, c and e, and low δ 13 C during MIS 2, 4 and 6, which are temperature minima, with larger amplitude variability in the Atlantic Ocean than the Pacific Ocean. This is likely to result from changes in biosphere carbon storage, modulated by changes in ocean circulation, productivity, and air-sea gas exchange. The North Atlantic vertical δ 13 C gradient is greater during temperature minima than temperature maxima, attributed to changes in the spatial extent of Atlantic source waters. There are insufficient data from shallower than 2500 m to obtain a coherent pattern in other ocean basins. The data synthesis indicates that basin-scale δ 13 C during the last interglacial (MIS 5e) is not clearly distinguishable from the Holocene (MIS 1) or from MIS 5a and 5c, despite significant differences in ice volume and atmospheric CO 2 concentration during these intervals. Similarly, MIS 6 is only ... Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Pacific Climate of the Past 6 5 645 673 |
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ftdoajarticles |
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English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 R. E. M. Rickaby N. R. Edwards G. M. Henderson S. Crowhurst B. A. A. Hoogakker K. I. C. Oliver H. Elderfield A synthesis of marine sediment core δ 13 C data over the last 150 000 years |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
The isotopic composition of carbon, δ 13 C, in seawater is used in reconstructions of ocean circulation, marine productivity, air-sea gas exchange, and biosphere carbon storage. Here, a synthesis of δ 13 C measurements taken from foraminifera in marine sediment cores over the last 150 000 years is presented. The dataset comprises previously published and unpublished data from benthic and planktonic records throughout the global ocean. Data are placed on a common δ 18 O age scale suitable for examining orbital timescale variability but not millennial events, which are removed by a 10 ka filter. Error estimates account for the resolution and scatter of the original data, and uncertainty in the relationship between δ 13 C of calcite and of dissolved inorganic carbon (DIC) in seawater. This will assist comparison with δ 13 C of DIC output from models, which can be further improved using model outputs such as temperature, DIC concentration, and alkalinity to improve estimates of fractionation during calcite formation. High global deep ocean δ 13 C, indicating isotopically heavy carbon, is obtained during Marine Isotope Stages (MIS) 1, 3, 5a, c and e, and low δ 13 C during MIS 2, 4 and 6, which are temperature minima, with larger amplitude variability in the Atlantic Ocean than the Pacific Ocean. This is likely to result from changes in biosphere carbon storage, modulated by changes in ocean circulation, productivity, and air-sea gas exchange. The North Atlantic vertical δ 13 C gradient is greater during temperature minima than temperature maxima, attributed to changes in the spatial extent of Atlantic source waters. There are insufficient data from shallower than 2500 m to obtain a coherent pattern in other ocean basins. The data synthesis indicates that basin-scale δ 13 C during the last interglacial (MIS 5e) is not clearly distinguishable from the Holocene (MIS 1) or from MIS 5a and 5c, despite significant differences in ice volume and atmospheric CO 2 concentration during these intervals. Similarly, MIS 6 is only ... |
format |
Article in Journal/Newspaper |
author |
R. E. M. Rickaby N. R. Edwards G. M. Henderson S. Crowhurst B. A. A. Hoogakker K. I. C. Oliver H. Elderfield |
author_facet |
R. E. M. Rickaby N. R. Edwards G. M. Henderson S. Crowhurst B. A. A. Hoogakker K. I. C. Oliver H. Elderfield |
author_sort |
R. E. M. Rickaby |
title |
A synthesis of marine sediment core δ 13 C data over the last 150 000 years |
title_short |
A synthesis of marine sediment core δ 13 C data over the last 150 000 years |
title_full |
A synthesis of marine sediment core δ 13 C data over the last 150 000 years |
title_fullStr |
A synthesis of marine sediment core δ 13 C data over the last 150 000 years |
title_full_unstemmed |
A synthesis of marine sediment core δ 13 C data over the last 150 000 years |
title_sort |
synthesis of marine sediment core δ 13 c data over the last 150 000 years |
publisher |
Copernicus Publications |
publishDate |
2010 |
url |
https://doi.org/10.5194/cp-6-645-2010 https://doaj.org/article/319c3ec8e5024996baf1144389ba131c |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Climate of the Past, Vol 6, Iss 5, Pp 645-673 (2010) |
op_relation |
http://www.clim-past.net/6/645/2010/cp-6-645-2010.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-6-645-2010 1814-9324 1814-9332 https://doaj.org/article/319c3ec8e5024996baf1144389ba131c |
op_doi |
https://doi.org/10.5194/cp-6-645-2010 |
container_title |
Climate of the Past |
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6 |
container_issue |
5 |
container_start_page |
645 |
op_container_end_page |
673 |
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1766136575188533248 |