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

Johansson, Sören; Santee, Michelle L.; Grooß, Jens-Uwe; Höpfner, Michael; Braun, Marleen; Friedl-Vallon, Felix; Khosrawi, Farahnaz; Kirner, Oliver; Kretschmer, Erik; Oelhaf, Hermann; Orphal, Johannes; Sinnhuber, Björn-Martin; Tritscher, Ines; Ungermann, Jörn; Walker, Kaley A.; Woiwode, Wolfgang

doi:10.5194/acp-19-8311-2019

Articles | Volume 19, issue 12

https://doi.org/10.5194/acp-19-8311-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

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

https://doi.org/10.5194/acp-19-8311-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 12

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, Michelle L. Santee, Jens-Uwe Grooß, Michael Höpfner, Marleen Braun, Felix Friedl-Vallon, Farahnaz Khosrawi, Oliver Kirner, Erik Kretschmer, Hermann Oelhaf, Johannes Orphal, Björn-Martin Sinnhuber, Ines Tritscher, Jörn Ungermann, Kaley A. Walker, and Wolfgang Woiwode

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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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