Articles | Volume 21, issue 6
Atmos. Chem. Phys., 21, 5195–5216, 2021
https://doi.org/10.5194/acp-21-5195-2021
Atmos. Chem. Phys., 21, 5195–5216, 2021
https://doi.org/10.5194/acp-21-5195-2021

Research article 01 Apr 2021

Research article | 01 Apr 2021

How frequent is natural cloud seeding from ice cloud layers ( < −35 °C) over Switzerland?

Ulrike Proske et al.

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AR by Ulrike Proske on behalf of the Authors (24 Feb 2021)  Author's response    Author's tracked changes    Manuscript
ED: Publish as is (24 Feb 2021) by Pedro Jimenez-Guerrero
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Short summary
Ice crystals falling out of one cloud can initiate freezing in a second cloud below. We estimate the occurrence frequency of this natural cloud seeding over Switzerland from satellite data and sublimation calculations. We find that such situations with an ice cloud above another cloud are frequent and that the falling crystals survive the fall between two clouds in a significant number of cases, suggesting that natural cloud seeding is an important phenomenon over Switzerland.
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