Chemical ozone loss and chlorine activation in the Antarctic winters of 2013–2020

Roy, Raina; Kumar, Pankaj; Kuttippurath, Jayanarayanan; Lefevre, Franck

doi:https://doi.org/10.5194/acp-24-2377-2024

Articles | Volume 24, issue 4

https://doi.org/10.5194/acp-24-2377-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-24-2377-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 24, issue 4

Research article

|

23 Feb 2024

Research article |

| 23 Feb 2024

Chemical ozone loss and chlorine activation in the Antarctic winters of 2013–2020

Raina Roy, Pankaj Kumar, Jayanarayanan Kuttippurath, and Franck Lefevre

Supplement

https://doi.org/10.5194/acp-24-2377-2024-supplement

Data sets

The Modern-Era Retrospective Analysis for Research and Applications, Version 2 (MERRA- 2) (https://ozonewatch.gsfc.nasa. gov/) R. Gelaro, W. McCarty, M. J. Suárez, R. Todling, A. Molod, L. Takacs, C. A. Randles, A., Darmenov, M. G. Bosilovich, R. Reichle, K. Wargan, L. Coy, R. Cullather, C. Draper, S. Akella, V. Buchard, A. Conaty, A. M. da Silva, W. Gu, G.-K. Kim, R. Koster, R. Lucchesi, D. Merkova, J. E. Nielsen, G. Partyka, S. Pawson, W. Putman, M. Rienecker, S. D. Schubert, M. Sienkiewicz, and B. Zhao https://doi.org/10.1175/JCLI-D-16-0758.1

Chemistry of the 1991/1992 stratospheric winter: three-dimensional model simulations F. Lefèvre, G. P. Brasseur, I. Folkins, A. K. Smith, and P. Simon http://cds-espri.ipsl.fr/

Earth Observing System (EOS) Aura Microwave Limb Sounder (MLS) Version 4.2x Level 2 and 3 data quality and description document N. J. Livesey, W. G. Read, P. A. Wagner, L. Froidevaux, A. Lambert, G. L. Manney, L. F. Millán Valle, H. C. Pumphrey, M. L. Santee, M. J. Schwartz, S. Wang, R. A. Fuller, R. F. Jarnot, B. W. Knosp, E. Martinez, and R. R. Lay https://disc.gsfc.nasa.gov/

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Short summary

We assess the interannual variability of ozone loss and chlorine activation in the Antarctic winters of 2013–2020. The analysis shows significant interannual variability in the Antarctic ozone during this period as compared to the previous decade (2000–2010). Dynamics and chemistry of the winters play their respective roles in the ozone loss process. The winter of 2019 is an example of favourable chemistry helping in the large loss of ozone, though the dynamical conditions were unfavourable.