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(39)Ar dating with small samples provides new key constraints on ocean ventilation

Ocean ventilation is the integrated effect of various processes that exchange surface properties with the ocean interior and is essential for oxygen supply, storage of anthropogenic carbon and the heat budget of the ocean, for instance. Current observational methods utilise transient tracers, e.g. t...

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Autores principales: Ebser, Sven, Kersting, Arne, Stöven, Tim, Feng, Zhongyi, Ringena, Lisa, Schmidt, Maximilian, Tanhua, Toste, Aeschbach, Werner, Oberthaler, Markus K.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6261945/
https://www.ncbi.nlm.nih.gov/pubmed/30487580
http://dx.doi.org/10.1038/s41467-018-07465-7
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author Ebser, Sven
Kersting, Arne
Stöven, Tim
Feng, Zhongyi
Ringena, Lisa
Schmidt, Maximilian
Tanhua, Toste
Aeschbach, Werner
Oberthaler, Markus K.
author_facet Ebser, Sven
Kersting, Arne
Stöven, Tim
Feng, Zhongyi
Ringena, Lisa
Schmidt, Maximilian
Tanhua, Toste
Aeschbach, Werner
Oberthaler, Markus K.
author_sort Ebser, Sven
collection PubMed
description Ocean ventilation is the integrated effect of various processes that exchange surface properties with the ocean interior and is essential for oxygen supply, storage of anthropogenic carbon and the heat budget of the ocean, for instance. Current observational methods utilise transient tracers, e.g. tritium, SF(6,) CFCs and (14)C. However, their dating ranges are not ideal to resolve the centennial-dynamics of the deep ocean, a gap filled by the noble gas isotope (39)Ar with a half-life of 269 years. Its broad application has been hindered by its very low abundance, requiring 1000 L of water for dating. Here we show successful (39)Ar dating with 5 L of water based on the atom-optical technique Atom Trap Trace Analysis. Our data reveal previously not quantifiable ventilation patterns in the Tropical Atlantic, where we find that advection is more important for the ventilation of the intermediate depth range than previously assumed. Now, the demonstrated analytical capabilities allow for a global collection of (39)Ar data, which will have significant impact on our ability to quantify ocean ventilation.
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spelling pubmed-62619452018-11-30 (39)Ar dating with small samples provides new key constraints on ocean ventilation Ebser, Sven Kersting, Arne Stöven, Tim Feng, Zhongyi Ringena, Lisa Schmidt, Maximilian Tanhua, Toste Aeschbach, Werner Oberthaler, Markus K. Nat Commun Article Ocean ventilation is the integrated effect of various processes that exchange surface properties with the ocean interior and is essential for oxygen supply, storage of anthropogenic carbon and the heat budget of the ocean, for instance. Current observational methods utilise transient tracers, e.g. tritium, SF(6,) CFCs and (14)C. However, their dating ranges are not ideal to resolve the centennial-dynamics of the deep ocean, a gap filled by the noble gas isotope (39)Ar with a half-life of 269 years. Its broad application has been hindered by its very low abundance, requiring 1000 L of water for dating. Here we show successful (39)Ar dating with 5 L of water based on the atom-optical technique Atom Trap Trace Analysis. Our data reveal previously not quantifiable ventilation patterns in the Tropical Atlantic, where we find that advection is more important for the ventilation of the intermediate depth range than previously assumed. Now, the demonstrated analytical capabilities allow for a global collection of (39)Ar data, which will have significant impact on our ability to quantify ocean ventilation. Nature Publishing Group UK 2018-11-28 /pmc/articles/PMC6261945/ /pubmed/30487580 http://dx.doi.org/10.1038/s41467-018-07465-7 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Ebser, Sven
Kersting, Arne
Stöven, Tim
Feng, Zhongyi
Ringena, Lisa
Schmidt, Maximilian
Tanhua, Toste
Aeschbach, Werner
Oberthaler, Markus K.
(39)Ar dating with small samples provides new key constraints on ocean ventilation
title (39)Ar dating with small samples provides new key constraints on ocean ventilation
title_full (39)Ar dating with small samples provides new key constraints on ocean ventilation
title_fullStr (39)Ar dating with small samples provides new key constraints on ocean ventilation
title_full_unstemmed (39)Ar dating with small samples provides new key constraints on ocean ventilation
title_short (39)Ar dating with small samples provides new key constraints on ocean ventilation
title_sort (39)ar dating with small samples provides new key constraints on ocean ventilation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6261945/
https://www.ncbi.nlm.nih.gov/pubmed/30487580
http://dx.doi.org/10.1038/s41467-018-07465-7
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