Articles | Volume 25, issue 14
https://doi.org/10.5194/acp-25-8107-2025
https://doi.org/10.5194/acp-25-8107-2025
Research article
 | 
29 Jul 2025
Research article |  | 29 Jul 2025

Tracing elevated abundance of CH2Cl2 in the subarctic upper troposphere to the Asian Summer Monsoon

Markus Jesswein, Valentin Lauther, Nicolas Emig, Peter Hoor, Timo Keber, Hans-Christoph Lachnitt, Linda Ort, Tanja Schuck, Johannes Strobel, Ronja Van Luijt, C. Michael Volk, Franziska Weyland, and Andreas Engel

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Cited articles

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Short summary
The study investigates transport within the Asian Summer Monsoon, focusing on how CH2Cl2 reaches the subarctic tropopause region. Using data from the PHILEAS campaign in 2023, events with increased mixing ratios were detected. Their origin, the transport paths to the tropopause region, and the potential entry into the stratosphere were analyzed. The East Asian Summer Monsoon was identified as the main transport pathway, with only a small contribution to the stratosphere in the following days.
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