A synthesis of marine sediment core δ¹³C data over the last 150 000 years
The isotopic composition of carbon, δ¹³C, in seawater is used in reconstructions of ocean circulation, marine productivity, air-sea gas exchange, and biosphere carbon storage. here, a synthesis of δ¹³C measurements taken from foraminifera in marine sediment cores over the last 150 000 years is prese...
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ftuloxford:oai:ora.ox.ac.uk:uuid:fbae2e5c-08c6-4382-b637-c4f2890ba32d 2023-05-15T17:36:53+02:00 A synthesis of marine sediment core δ¹³C data over the last 150 000 years Oliver, K Hoogakker, B Crowhurst, S Henderson, G Rickaby, R Edwards, N Elderfield, H Union, European Geosciences 2016-07-29 https://ora.ox.ac.uk/objects/uuid:fbae2e5c-08c6-4382-b637-c4f2890ba32d eng eng Copernicus Publications https://ora.ox.ac.uk/objects/uuid:fbae2e5c-08c6-4382-b637-c4f2890ba32d info:eu-repo/semantics/openAccess CC Attribution (CC BY) CC-BY Earth sciences Journal article 2016 ftuloxford 2022-06-28T20:28:46Z The isotopic composition of carbon, δ¹³C, in seawater is used in reconstructions of ocean circulation, marine productivity, air-sea gas exchange, and biosphere carbon storage. here, a synthesis of δ¹³C 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 The dataset comprises previously published and unpublished data from benthic and planktonic records throughout the global ocean.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 δ¹⁸ O age scale and filtered to remove timescales shorter than 6 kyr. Error estimates account for the resolution and scatter of the original data, and uncertainty in the relationship between δ¹³C of calcite and of dissolved inorganic carbon (DIC) in seawater. This will assist comparison with δ¹³C 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 δ¹³C, indicating isotopically heavy carbon, is obtained during Marine Isotope Stages (MIS), 1, 3, 5a, 5c and 5e, and low δ¹³C 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 δ¹³C 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 δ¹³C 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 CO₂ concentration during these intervals. Similarly, MIS 6 is only distinguishable from MIS 2 or 4 due to globally lower δ¹³C values both in ... Article in Journal/Newspaper North Atlantic ORA - Oxford University Research Archive Pacific |
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Open Polar |
collection |
ORA - Oxford University Research Archive |
op_collection_id |
ftuloxford |
language |
English |
topic |
Earth sciences |
spellingShingle |
Earth sciences Oliver, K Hoogakker, B Crowhurst, S Henderson, G Rickaby, R Edwards, N Elderfield, H A synthesis of marine sediment core δ¹³C data over the last 150 000 years |
topic_facet |
Earth sciences |
description |
The isotopic composition of carbon, δ¹³C, in seawater is used in reconstructions of ocean circulation, marine productivity, air-sea gas exchange, and biosphere carbon storage. here, a synthesis of δ¹³C 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 δ¹⁸ O age scale and filtered to remove timescales shorter than 6 kyr. Error estimates account for the resolution and scatter of the original data, and uncertainty in the relationship between δ¹³C of calcite and of dissolved inorganic carbon (DIC) in seawater. This will assist comparison with δ¹³C 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 δ¹³C, indicating isotopically heavy carbon, is obtained during Marine Isotope Stages (MIS), 1, 3, 5a, 5c and 5e, and low δ¹³C 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 δ¹³C 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 δ¹³C 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 CO₂ concentration during these intervals. Similarly, MIS 6 is only distinguishable from MIS 2 or 4 due to globally lower δ¹³C values both in ... |
author2 |
Union, European Geosciences |
format |
Article in Journal/Newspaper |
author |
Oliver, K Hoogakker, B Crowhurst, S Henderson, G Rickaby, R Edwards, N Elderfield, H |
author_facet |
Oliver, K Hoogakker, B Crowhurst, S Henderson, G Rickaby, R Edwards, N Elderfield, H |
author_sort |
Oliver, K |
title |
A synthesis of marine sediment core δ¹³C data over the last 150 000 years |
title_short |
A synthesis of marine sediment core δ¹³C data over the last 150 000 years |
title_full |
A synthesis of marine sediment core δ¹³C data over the last 150 000 years |
title_fullStr |
A synthesis of marine sediment core δ¹³C data over the last 150 000 years |
title_full_unstemmed |
A synthesis of marine sediment core δ¹³C data over the last 150 000 years |
title_sort |
synthesis of marine sediment core δ¹³c data over the last 150 000 years |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://ora.ox.ac.uk/objects/uuid:fbae2e5c-08c6-4382-b637-c4f2890ba32d |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://ora.ox.ac.uk/objects/uuid:fbae2e5c-08c6-4382-b637-c4f2890ba32d |
op_rights |
info:eu-repo/semantics/openAccess CC Attribution (CC BY) |
op_rightsnorm |
CC-BY |
_version_ |
1766136526433943552 |