Tracing the oxygen isotope composition of the upper Earth’s atmosphere using cosmic spherulesOPEN ACCESS 

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Andreas Pack, Andres Höweling, Dominik C. Hezel, Maren T. Stefanak, Anne-Katrin Beck, Stefan T. M. Peters, Sukanya Sengupta, Daniel Herwartz & Luigi Folco

Nature Communications 8,
Article number: 15702 (2017)
doi:10.1038/ncomms15702

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“Oxygen contained within cosmic spherules is sourced from the atmosphere, making micrometeorites a possible archive for past atmospheric conditions. Here, Pack et al. compare the isotopic composition of oxygen in cosmic spherules from Antarctica with that of the troposphere, and validate the value of this archive.”

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