Articles | Volume 21, issue 9
Atmos. Chem. Phys., 21, 6857–6873, 2021
https://doi.org/10.5194/acp-21-6857-2021
Atmos. Chem. Phys., 21, 6857–6873, 2021
https://doi.org/10.5194/acp-21-6857-2021

Research article 05 May 2021

Research article | 05 May 2021

Stratospheric carbon isotope fractionation and tropospheric histories of CFC-11, CFC-12, and CFC-113 isotopologues

Max Thomas et al.

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Short summary
CFC gases are destroying the Earth's life-protecting ozone layer. We improve understanding of CFC destruction by measuring the isotopic fingerprint of the carbon in the three most abundant CFCs. These are the first such measurements in the main region where CFCs are destroyed – the stratosphere. We reconstruct the atmospheric isotope histories of these CFCs back to the 1950s by measuring air extracted from deep snow and using a model. The model and the measurements are generally consistent.
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