I-Type Cosmic Spherules as Proxy for the Δ′17O of the Atmosphere—A Calibration With Quraternary Air ...
Remnants of shooting stars are preserved in form of cosmic spherules in ice and sediments. The extraterrestrial material is heated and melted upon atmospheric entry and is collected at the Earth's surface as cosmic spherules. A fraction of cosmic spherules (I-type cosmic spherules) sources from...
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Online Access: | https://dx.doi.org/10.15488/14497 https://www.repo.uni-hannover.de/handle/123456789/14615 |
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ftdatacite:10.15488/14497 2023-10-01T03:52:07+02:00 I-Type Cosmic Spherules as Proxy for the Δ′17O of the Atmosphere—A Calibration With Quraternary Air ... Fischer, Meike B. Oeser, Martin Weyer, Stefan Folco, Luigi Peters, Stefan T. M. Zahnow, Fabian Pack, Andreas 2021 https://dx.doi.org/10.15488/14497 https://www.repo.uni-hannover.de/handle/123456789/14615 en eng Hoboken, NJ : Wiley Creative Commons Attribution Non Commercial No Derivatives 4.0 International CC BY-NC-ND 4.0 Unported https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode cc-by-nc-nd-4.0 atmosphere cosmic isotopes oxygen spherules Dewey Decimal Classification500 | Naturwissenschaften550 | Geowissenschaften ScholarlyArticle Article article-journal Text 2021 ftdatacite https://doi.org/10.15488/14497 2023-09-04T14:21:45Z Remnants of shooting stars are preserved in form of cosmic spherules in ice and sediments. The extraterrestrial material is heated and melted upon atmospheric entry and is collected at the Earth's surface as cosmic spherules. A fraction of cosmic spherules (I-type cosmic spherules) sources from extraterrestrial Fe,Ni metal. These metal particles melt and become oxidized in the atmosphere. The oxygen in the resulting oxides (magnetite, wüstite) sources entirely from the atmosphere. Here, we demonstrate that I-type cosmic spherules can be used to reconstruct the triple oxygen isotope anomaly of the past atmosphere, which provides information on the gross primary productivity and/or paleo-CO2 levels. We present a calibration of the proxy using Antarctic cosmic spherules. We further introduce Δ′56Fe and demonstrate that triple iron isotopes can be used to obtain information about the underlying fractionation mechanism (e.g., kinetic vs. equilibrium fractionation). ... Text Antarc* Antarctic DataCite Metadata Store (German National Library of Science and Technology) Antarctic Dewey ENVELOPE(-64.320,-64.320,-65.907,-65.907) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
atmosphere cosmic isotopes oxygen spherules Dewey Decimal Classification500 | Naturwissenschaften550 | Geowissenschaften |
spellingShingle |
atmosphere cosmic isotopes oxygen spherules Dewey Decimal Classification500 | Naturwissenschaften550 | Geowissenschaften Fischer, Meike B. Oeser, Martin Weyer, Stefan Folco, Luigi Peters, Stefan T. M. Zahnow, Fabian Pack, Andreas I-Type Cosmic Spherules as Proxy for the Δ′17O of the Atmosphere—A Calibration With Quraternary Air ... |
topic_facet |
atmosphere cosmic isotopes oxygen spherules Dewey Decimal Classification500 | Naturwissenschaften550 | Geowissenschaften |
description |
Remnants of shooting stars are preserved in form of cosmic spherules in ice and sediments. The extraterrestrial material is heated and melted upon atmospheric entry and is collected at the Earth's surface as cosmic spherules. A fraction of cosmic spherules (I-type cosmic spherules) sources from extraterrestrial Fe,Ni metal. These metal particles melt and become oxidized in the atmosphere. The oxygen in the resulting oxides (magnetite, wüstite) sources entirely from the atmosphere. Here, we demonstrate that I-type cosmic spherules can be used to reconstruct the triple oxygen isotope anomaly of the past atmosphere, which provides information on the gross primary productivity and/or paleo-CO2 levels. We present a calibration of the proxy using Antarctic cosmic spherules. We further introduce Δ′56Fe and demonstrate that triple iron isotopes can be used to obtain information about the underlying fractionation mechanism (e.g., kinetic vs. equilibrium fractionation). ... |
format |
Text |
author |
Fischer, Meike B. Oeser, Martin Weyer, Stefan Folco, Luigi Peters, Stefan T. M. Zahnow, Fabian Pack, Andreas |
author_facet |
Fischer, Meike B. Oeser, Martin Weyer, Stefan Folco, Luigi Peters, Stefan T. M. Zahnow, Fabian Pack, Andreas |
author_sort |
Fischer, Meike B. |
title |
I-Type Cosmic Spherules as Proxy for the Δ′17O of the Atmosphere—A Calibration With Quraternary Air ... |
title_short |
I-Type Cosmic Spherules as Proxy for the Δ′17O of the Atmosphere—A Calibration With Quraternary Air ... |
title_full |
I-Type Cosmic Spherules as Proxy for the Δ′17O of the Atmosphere—A Calibration With Quraternary Air ... |
title_fullStr |
I-Type Cosmic Spherules as Proxy for the Δ′17O of the Atmosphere—A Calibration With Quraternary Air ... |
title_full_unstemmed |
I-Type Cosmic Spherules as Proxy for the Δ′17O of the Atmosphere—A Calibration With Quraternary Air ... |
title_sort |
i-type cosmic spherules as proxy for the δ′17o of the atmosphere—a calibration with quraternary air ... |
publisher |
Hoboken, NJ : Wiley |
publishDate |
2021 |
url |
https://dx.doi.org/10.15488/14497 https://www.repo.uni-hannover.de/handle/123456789/14615 |
long_lat |
ENVELOPE(-64.320,-64.320,-65.907,-65.907) |
geographic |
Antarctic Dewey |
geographic_facet |
Antarctic Dewey |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_rights |
Creative Commons Attribution Non Commercial No Derivatives 4.0 International CC BY-NC-ND 4.0 Unported https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode cc-by-nc-nd-4.0 |
op_doi |
https://doi.org/10.15488/14497 |
_version_ |
1778517757811228672 |