Impact of chlorine ion chemistry on ozone loss in the middle atmosphere during very large solar proton events

Borthakur, Monali; Sinnhuber, Miriam; Laeng, Alexandra; Reddmann, Thomas; Braesicke, Peter; Stiller, Gabriele; von Clarmann, Thomas; Funke, Bernd; Usoskin, Ilya; Wissing, Jan Maik; Yakovchuk, Olesya

doi:https://doi.org/10.5194/acp-23-12985-2023

Articles | Volume 23, issue 20

https://doi.org/10.5194/acp-23-12985-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-23-12985-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 20

Research article

|

16 Oct 2023

Research article |

| 16 Oct 2023

Impact of chlorine ion chemistry on ozone loss in the middle atmosphere during very large solar proton events

Monali Borthakur, Miriam Sinnhuber, Alexandra Laeng, Thomas Reddmann, Peter Braesicke, Gabriele Stiller, Thomas von Clarmann, Bernd Funke, Ilya Usoskin, Jan Maik Wissing, and Olesya Yakovchuk

Supplement

https://doi.org/10.5194/acp-23-12985-2023-supplement

Data sets

IMK-IAA MIPAS V5 data set of ClONO2, HNO3, HOCl, N2O5, NO, NO2 and O3 vertical profiles and corresponding averaging kernel matrices for October and November 2003 N. Glatthor, B. Funke, M. García-Comas, U. Grabowski, S. Kellman, M. Kiefer, A. Laeng, A. Linden, M. Lopez Puertas, G. P. Stiller, and T. von Clarmann https://doi.org/10.5445/IR/1000156935

ExoTIC model results for model-measurement inter-comparison with MIPAS; ExoTIC model results for comparison of Halloween SPE and extreme event of 775 A.D. M. Borthakur https://doi.org/10.35097/934

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Short summary

Reduced ozone levels resulting from ozone depletion mean more exposure to UV radiation, which has various effects on human health. We analysed solar events to see what influence it has on the chemistry of Earth's atmosphere and how this atmospheric chemistry change can affect the ozone. To do this, we used an atmospheric model considering only chemistry and compared it with satellite data. The focus was mainly on the contribution of chlorine, and we found about 10 %–20 % ozone loss due to that.