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How frequent is natural cloud seeding over Switzerland? [post]

Ulrike Proske, Verena Bessenbacher, Zane Dedekind, Ulrike Lohmann, David Neubauer
2020 unpublished
Abstract. Clouds and cloud feedbacks represent one of the largest uncertainties in climate projections. As the ice phase influences many key cloud properties and their lifetime, its formation needs to be better understood in order to improve climate and weather prediction models. Ice crystals sedimenting out of a cloud do not sublimate immediately but can survive certain distances and eventually fall into a cloud below. This natural cloud seeding can trigger glaciation and has been shown to
more » ... s been shown to enhance precipitation formation. However, up to date an estimate of its occurrence frequency is lacking. In this study, we estimate the occurrence frequency of natural cloud seeding over Switzerland from satellite data and sublimation calculations. We use the DARDAR satellite product between April 2006 and October 2017 to estimate the occurrence frequency of multilayer cloud situations, where a cirrus cloud at T
doi:10.5194/acp-2020-1145 fatcat:ozuqznx6frbktgwuctgupe45y4