Unveiling atmospheric transport and mixing mechanisms of ice-nucleating particles over the Alps

Wieder, Jörg; Mignani, Claudia; Schär, Mario; Roth, Lucie; Sprenger, Michael; Henneberger, Jan; Lohmann, Ulrike; Brunner, Cyril; Kanji, Zamin A.

doi:https://doi.org/10.5194/acp-22-3111-2022

Articles | Volume 22, issue 5

https://doi.org/10.5194/acp-22-3111-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-22-3111-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 22, issue 5

Research article

|

09 Mar 2022

Research article |

| 09 Mar 2022

Unveiling atmospheric transport and mixing mechanisms of ice-nucleating particles over the Alps

Jörg Wieder, Claudia Mignani, Mario Schär, Lucie Roth, Michael Sprenger, Jan Henneberger, Ulrike Lohmann, Cyril Brunner, and Zamin A. Kanji

Data sets

Weather Station Davos Wolfgang J. Wieder https://doi.org/10.16904/envidat.137

Aerosol Data Davos Wolfgang J. Wieder and C. Rösch https://doi.org/10.16904/envidat.157

Aerosol Data Weissfluhjoch J. Wieder, C. Mignani, and C. Rösch https://doi.org/10.16904/envidat.156

Short summary

We investigate the variation in ice-nucleating particles (INPs) relevant for primary ice formation in mixed-phased clouds over the Alps based on simultaneous in situ observations at a mountaintop and a nearby high valley (1060 m height difference). In most cases, advection from the surrounding lower regions was responsible for changes in INP concentration, causing a diurnal cycle at the mountaintop. Our study underlines the importance of the planetary boundary layer as an INP reserve.