Tracing the oxygen isotope composition of the upper Earth's atmosphere using cosmic spherules

Molten I-type cosmic spherules formed by heating, oxidation and melting of extraterrestrial Fe,Ni metal alloys. The entire oxygen in these spherules sources from the atmosphere. Therefore, I-type cosmic spherules are suitable tracers for the isotopic composition of the upper atmosphere at altitudes...

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Autores principales: Pack, Andreas, Höweling, Andres, Hezel, Dominik C., Stefanak, Maren T., Beck, Anne-Katrin, Peters, Stefan T. M., Sengupta, Sukanya, Herwartz, Daniel, Folco, Luigi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2017
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Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5461487/
https://www.ncbi.nlm.nih.gov/pubmed/28569769
http://dx.doi.org/10.1038/ncomms15702
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author Pack, Andreas
Höweling, Andres
Hezel, Dominik C.
Stefanak, Maren T.
Beck, Anne-Katrin
Peters, Stefan T. M.
Sengupta, Sukanya
Herwartz, Daniel
Folco, Luigi
author_facet Pack, Andreas
Höweling, Andres
Hezel, Dominik C.
Stefanak, Maren T.
Beck, Anne-Katrin
Peters, Stefan T. M.
Sengupta, Sukanya
Herwartz, Daniel
Folco, Luigi
author_sort Pack, Andreas
collection PubMed
description Molten I-type cosmic spherules formed by heating, oxidation and melting of extraterrestrial Fe,Ni metal alloys. The entire oxygen in these spherules sources from the atmosphere. Therefore, I-type cosmic spherules are suitable tracers for the isotopic composition of the upper atmosphere at altitudes between 80 and 115 km. Here we present data on I-type cosmic spherules collected in Antarctica. Their composition is compared with the composition of tropospheric O(2). Our data suggest that the Earth's atmospheric O(2) is isotopically homogenous up to the thermosphere. This makes fossil I-type micrometeorites ideal proxies for ancient atmospheric CO(2) levels.
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spelling pubmed-54614872017-06-13 Tracing the oxygen isotope composition of the upper Earth's atmosphere using cosmic spherules Pack, Andreas Höweling, Andres Hezel, Dominik C. Stefanak, Maren T. Beck, Anne-Katrin Peters, Stefan T. M. Sengupta, Sukanya Herwartz, Daniel Folco, Luigi Nat Commun Article Molten I-type cosmic spherules formed by heating, oxidation and melting of extraterrestrial Fe,Ni metal alloys. The entire oxygen in these spherules sources from the atmosphere. Therefore, I-type cosmic spherules are suitable tracers for the isotopic composition of the upper atmosphere at altitudes between 80 and 115 km. Here we present data on I-type cosmic spherules collected in Antarctica. Their composition is compared with the composition of tropospheric O(2). Our data suggest that the Earth's atmospheric O(2) is isotopically homogenous up to the thermosphere. This makes fossil I-type micrometeorites ideal proxies for ancient atmospheric CO(2) levels. Nature Publishing Group 2017-06-01 /pmc/articles/PMC5461487/ /pubmed/28569769 http://dx.doi.org/10.1038/ncomms15702 Text en Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ 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
Pack, Andreas
Höweling, Andres
Hezel, Dominik C.
Stefanak, Maren T.
Beck, Anne-Katrin
Peters, Stefan T. M.
Sengupta, Sukanya
Herwartz, Daniel
Folco, Luigi
Tracing the oxygen isotope composition of the upper Earth's atmosphere using cosmic spherules
title Tracing the oxygen isotope composition of the upper Earth's atmosphere using cosmic spherules
title_full Tracing the oxygen isotope composition of the upper Earth's atmosphere using cosmic spherules
title_fullStr Tracing the oxygen isotope composition of the upper Earth's atmosphere using cosmic spherules
title_full_unstemmed Tracing the oxygen isotope composition of the upper Earth's atmosphere using cosmic spherules
title_short Tracing the oxygen isotope composition of the upper Earth's atmosphere using cosmic spherules
title_sort tracing the oxygen isotope composition of the upper earth's atmosphere using cosmic spherules
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5461487/
https://www.ncbi.nlm.nih.gov/pubmed/28569769
http://dx.doi.org/10.1038/ncomms15702
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