Articles | Volume 20, issue 20
https://doi.org/10.5194/acp-20-11697-2020
https://doi.org/10.5194/acp-20-11697-2020
Research article
 | 
16 Oct 2020
Research article |  | 16 Oct 2020

Impact of the eruption of Mt Pinatubo on the chemical composition of the stratosphere

Markus Kilian, Sabine Brinkop, and Patrick Jöckel

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Short summary
After the volcanic eruption of Mt Pinatubo in 1991, ozone decreased in the tropics and increased in the midlatitudes and polar regions for 1 year. The change in the ozone column is solely a result of the volcanic heating, followed by an ozone decrease in the higher latitudes. This is caused by the volcanic aerosol, which changes the heterogeneous chemistry and thus the catalytic ozone loss cycles. Vertical transport of water vapour is enhanced by volcanic heating and increases methane.
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