Articles | Volume 19, issue 12
Atmos. Chem. Phys., 19, 8311–8338, 2019
https://doi.org/10.5194/acp-19-8311-2019

Special issue: The Polar Stratosphere in a Changing Climate (POLSTRACC) (ACP/AMT...

Atmos. Chem. Phys., 19, 8311–8338, 2019
https://doi.org/10.5194/acp-19-8311-2019

Research article 27 Jun 2019

Research article | 27 Jun 2019

Unusual chlorine partitioning in the 2015/16 Arctic winter lowermost stratosphere: observations and simulations

Sören Johansson et al.

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Short summary
We present a study based on GLORIA aircraft and MLS/ACE-FTS/CALIOP satellite measurements during the Arctic winter 2015/16, which demonstrate (for the Arctic) unusual chlorine deactivation into HCl instead of ClONO2 due to low ozone abundances in the lowermost stratosphere, with a focus at 380 K potential temperature. The atmospheric models CLaMS and EMAC are evaluated, and measured ClONO2 is linked with transport and in situ deactivation in the lowermost stratosphere.
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