Universität zu Köln

Pack, Andreas, Hoeweling, Andres, Hezel, Dominik C., Stefanak, Maren T., Beck, Anne-Katrin, Peters, Stefan T. M., Sengupta, Sukanya, Herwartz, Daniel ORCID: 0000-0003-3604-8295 and Folco, Luigi ORCID: 0000-0002-7276-3483 (2017). Tracing the oxygen isotope composition of the upper Earth's atmosphere using cosmic spherules. Nat. Commun., 8. LONDON: NATURE PUBLISHING GROUP. ISSN 2041-1723

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Abstract

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 CO2 levels.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Pack, Andreas UNSPECIFIED UNSPECIFIED UNSPECIFIED Hoeweling, Andres UNSPECIFIED UNSPECIFIED UNSPECIFIED Hezel, Dominik C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stefanak, Maren T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Beck, Anne-Katrin UNSPECIFIED UNSPECIFIED UNSPECIFIED Peters, Stefan T. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sengupta, Sukanya UNSPECIFIED UNSPECIFIED UNSPECIFIED Herwartz, Daniel UNSPECIFIED orcid.org/0000-0003-3604-8295 UNSPECIFIED Folco, Luigi UNSPECIFIED orcid.org/0000-0002-7276-3483 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-228472
DOI:	10.1038/ncomms15702
Journal or Publication Title:	Nat. Commun.
Volume:	8
Date:	2017
Publisher:	NATURE PUBLISHING GROUP
Place of Publication:	LONDON
ISSN:	2041-1723
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language DEEP-SEA SPHERULES; FRACTIONATION; RATIOS; IRON; SILICATES; NICKEL; DUST; ICE; FE Multiple languages Multidisciplinary Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/22847