An improved method for estimating water-mass ventilation age from radiocarbon data
Existing methods for inferring the ventilation age of water masses in the ocean using radiocarbon data neglect the effects of diffusive mixing. in the presence of varying atmospheric Delta(14)C, this neglect produces spurious time dependence in the estimated ventilation ages. To correct this deficie...
Published in: | Earth and Planetary Science Letters |
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Online Access: | https://archimer.ifremer.fr/doc/00231/34197/32870.pdf https://doi.org/10.1016/j.epsl.2010.04.011 https://archimer.ifremer.fr/doc/00231/34197/ |
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ftarchimer:oai:archimer.ifremer.fr:34197 2023-05-15T18:28:27+02:00 An improved method for estimating water-mass ventilation age from radiocarbon data Devries, Tim Primeau, Francois 2010-07 application/pdf https://archimer.ifremer.fr/doc/00231/34197/32870.pdf https://doi.org/10.1016/j.epsl.2010.04.011 https://archimer.ifremer.fr/doc/00231/34197/ eng eng Elsevier Science Bv https://archimer.ifremer.fr/doc/00231/34197/32870.pdf doi:10.1016/j.epsl.2010.04.011 https://archimer.ifremer.fr/doc/00231/34197/ 2010 Elsevier B.V. All rights reserved info:eu-repo/semantics/openAccess restricted use Earth And Planetary Science Letters (0012-821X) (Elsevier Science Bv), 2010-07 , Vol. 295 , N. 3-4 , P. 367-378 Ocean Drilling Program Site 887 ventilation age radiocarbon transit-time distribution glacial-interglacial text Publication info:eu-repo/semantics/article 2010 ftarchimer https://doi.org/10.1016/j.epsl.2010.04.011 2021-09-23T20:25:14Z Existing methods for inferring the ventilation age of water masses in the ocean using radiocarbon data neglect the effects of diffusive mixing. in the presence of varying atmospheric Delta(14)C, this neglect produces spurious time dependence in the estimated ventilation ages. To correct this deficiency we propose a new method for estimating the ventilation age from sediment core radiocarbon data. The new method is formulated in terms of parameterized age distributions that account for the effects of advective and diffusive transport in the ocean. When applied to simulated radiocarbon data from an OGCM, the method is able to closely reproduce the modeled ventilation age, whereas other methods are not. We also applied the method to sediment-core radiocarbon data from the deep subarctic northeast Pacific. We estimated the model parameters using a Bayesian approach that allows for a careful quantification of the uncertainty in the inferred ventilation age. Results from the sediment-core analysis show larger ventilation ages during the last glacial maximum compared to the Holocene, although uncertainty on individual age estimates is high. Large excursions in ventilation ages for one of the cores may also indicate a change in the reservoir age of North Pacific surface waters during the last deglaciation. Article in Journal/Newspaper Subarctic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Pacific Earth and Planetary Science Letters 295 3-4 367 378 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Ocean Drilling Program Site 887 ventilation age radiocarbon transit-time distribution glacial-interglacial |
spellingShingle |
Ocean Drilling Program Site 887 ventilation age radiocarbon transit-time distribution glacial-interglacial Devries, Tim Primeau, Francois An improved method for estimating water-mass ventilation age from radiocarbon data |
topic_facet |
Ocean Drilling Program Site 887 ventilation age radiocarbon transit-time distribution glacial-interglacial |
description |
Existing methods for inferring the ventilation age of water masses in the ocean using radiocarbon data neglect the effects of diffusive mixing. in the presence of varying atmospheric Delta(14)C, this neglect produces spurious time dependence in the estimated ventilation ages. To correct this deficiency we propose a new method for estimating the ventilation age from sediment core radiocarbon data. The new method is formulated in terms of parameterized age distributions that account for the effects of advective and diffusive transport in the ocean. When applied to simulated radiocarbon data from an OGCM, the method is able to closely reproduce the modeled ventilation age, whereas other methods are not. We also applied the method to sediment-core radiocarbon data from the deep subarctic northeast Pacific. We estimated the model parameters using a Bayesian approach that allows for a careful quantification of the uncertainty in the inferred ventilation age. Results from the sediment-core analysis show larger ventilation ages during the last glacial maximum compared to the Holocene, although uncertainty on individual age estimates is high. Large excursions in ventilation ages for one of the cores may also indicate a change in the reservoir age of North Pacific surface waters during the last deglaciation. |
format |
Article in Journal/Newspaper |
author |
Devries, Tim Primeau, Francois |
author_facet |
Devries, Tim Primeau, Francois |
author_sort |
Devries, Tim |
title |
An improved method for estimating water-mass ventilation age from radiocarbon data |
title_short |
An improved method for estimating water-mass ventilation age from radiocarbon data |
title_full |
An improved method for estimating water-mass ventilation age from radiocarbon data |
title_fullStr |
An improved method for estimating water-mass ventilation age from radiocarbon data |
title_full_unstemmed |
An improved method for estimating water-mass ventilation age from radiocarbon data |
title_sort |
improved method for estimating water-mass ventilation age from radiocarbon data |
publisher |
Elsevier Science Bv |
publishDate |
2010 |
url |
https://archimer.ifremer.fr/doc/00231/34197/32870.pdf https://doi.org/10.1016/j.epsl.2010.04.011 https://archimer.ifremer.fr/doc/00231/34197/ |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Earth And Planetary Science Letters (0012-821X) (Elsevier Science Bv), 2010-07 , Vol. 295 , N. 3-4 , P. 367-378 |
op_relation |
https://archimer.ifremer.fr/doc/00231/34197/32870.pdf doi:10.1016/j.epsl.2010.04.011 https://archimer.ifremer.fr/doc/00231/34197/ |
op_rights |
2010 Elsevier B.V. All rights reserved info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1016/j.epsl.2010.04.011 |
container_title |
Earth and Planetary Science Letters |
container_volume |
295 |
container_issue |
3-4 |
container_start_page |
367 |
op_container_end_page |
378 |
_version_ |
1766210928430284800 |