Articles | Volume 22, issue 2
Atmos. Chem. Phys., 22, 1175–1193, 2022
https://doi.org/10.5194/acp-22-1175-2022

Special issue: The Modular Earth Submodel System (MESSy) (ACP/GMD inter-journal...

Atmos. Chem. Phys., 22, 1175–1193, 2022
https://doi.org/10.5194/acp-22-1175-2022
Research article
24 Jan 2022
Research article | 24 Jan 2022

The impact of sulfur hexafluoride (SF6) sinks on age of air climatologies and trends

Sheena Loeffel et al.

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Short summary
SF6-derived trends of stratospheric AoA from observations and model simulations disagree in sign. SF6 experiences chemical degradation, which we explicitly integrate in a global climate model. In our simulations, the AoA trend changes sign when SF6 sinks are considered; thus, the process has the potential to reconcile simulated with observed AoA trends. We show that the positive AoA trend is due to the SF6 sinks themselves and provide a first approach for a correction to account for SF6 loss.
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