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...
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Online Access: | https://doi.org/10.1016/j.epsl.2010.04.011 https://archimer.ifremer.fr/doc/00231/34197/32870.pdf https://archimer.ifremer.fr/doc/00231/34197/ |
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fttriple:oai:gotriple.eu:10670/1.d9eisv 2023-05-15T18:28:26+02:00 An improved method for estimating water-mass ventilation age from radiocarbon data Devries, Tim Primeau, Francois 2010-01-01 https://doi.org/10.1016/j.epsl.2010.04.011 https://archimer.ifremer.fr/doc/00231/34197/32870.pdf https://archimer.ifremer.fr/doc/00231/34197/ en eng Elsevier Science Bv doi:10.1016/j.epsl.2010.04.011 10670/1.d9eisv https://archimer.ifremer.fr/doc/00231/34197/32870.pdf https://archimer.ifremer.fr/doc/00231/34197/ other Archimer, archive institutionnelle de l'Ifremer Earth And Planetary Science Letters (0012-821X) (Elsevier Science Bv), 2010-07 , Vol. 295 , N. 3-4 , P. 367-378 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2010 fttriple https://doi.org/10.1016/j.epsl.2010.04.011 2023-01-22T18:15:07Z 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. Text Subarctic Unknown Pacific Earth and Planetary Science Letters 295 3-4 367 378 |
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geo envir Devries, Tim Primeau, Francois An improved method for estimating water-mass ventilation age from radiocarbon data |
topic_facet |
geo envir |
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 |
Text |
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://doi.org/10.1016/j.epsl.2010.04.011 https://archimer.ifremer.fr/doc/00231/34197/32870.pdf https://archimer.ifremer.fr/doc/00231/34197/ |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Archimer, archive institutionnelle de l'Ifremer Earth And Planetary Science Letters (0012-821X) (Elsevier Science Bv), 2010-07 , Vol. 295 , N. 3-4 , P. 367-378 |
op_relation |
doi:10.1016/j.epsl.2010.04.011 10670/1.d9eisv https://archimer.ifremer.fr/doc/00231/34197/32870.pdf https://archimer.ifremer.fr/doc/00231/34197/ |
op_rights |
other |
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 |
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1766210909605199872 |