Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 18
Articles | Volume 25, issue 18
https://doi.org/10.5194/acp-25-11535-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-11535-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 18
Research article
 | 
29 Sep 2025
Research article |  | 29 Sep 2025

Quantifying the decay timescale of volcanic sulfur dioxide in the stratosphere

Paul A. Nicknish, Kane Stone, Susan Solomon, and Simon A. Carn

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Short summary
Large volcanic eruptions can inject teragrams of sulfur dioxide (SO2) into the stratosphere, influencing stratospheric chemistry and Earth's climate. This work calculates decay timescales of volcanic gas-phase SO2 in the stratosphere using data from three satellite products. SO2 decay timescales vary significantly between the different products, and this uncertainty limits our ability to attribute an observed SO2 decay following an eruption to a specific chemical process.
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