Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 6
Articles | Volume 26, issue 6
https://doi.org/10.5194/acp-26-4359-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-4359-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 6
Research article
 | 
27 Mar 2026
Research article |  | 27 Mar 2026

The lapse rate and the cold point tropopause in the Asian Summer Monsoon anticyclone

Rolf Müller, Bärbel Vogel, Martina Krämer, Christian Rolf, Nicole Spelten, and Fabrizio Ravegnani

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Short summary
In the Asian summer monsoon anticyclone  the lapse rate tropopause, and not the cold point, constitutes a good estimate of the upper boundary of the well mixed tropospheric air mass. For strong convection there is substantial dehydration at the cold point tropopause (in summer 2017). Above the cold point tropopause, under such conditions, neither ice particle occurrence, nor enhanced molar mixing ratios of water vapour (above ≲ 6 ppm) are observed.
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