Articles | Volume 20, issue 23
https://doi.org/10.5194/acp-20-14969-2020
https://doi.org/10.5194/acp-20-14969-2020
Research article
 | 
04 Dec 2020
Research article |  | 04 Dec 2020

Is there a direct solar proton impact on lower-stratospheric ozone?

Jia Jia, Antti Kero, Niilo Kalakoski, Monika E. Szeląg, and Pekka T. Verronen

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Short summary
Recent studies have reported up to a 10 % average decrease of lower stratospheric ozone at 20 km altitude following solar proton events (SPEs). Our study uses 49 events that occurred after the launch of Aura MLS (July 2004–now) and 177 events that occurred in the WACCM-D simulation period (Jan 1989–Dec 2012) to evaluate ozone changes following SPEs. The statistical and case-by-case studies show no solid evidence of SPE's direct impact on the lower stratospheric ozone.
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