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Updated: Dec 20, 2025

Computation of Atmospheric Concentrations of Molecular Clusters from ab initio Thermochemistry
Published on: April 8, 2020
Precipitation Modification by Ionization
R Giles Harrison1, Keri A Nicoll1,2, Maarten H P Ambaum1
1Department of Meteorology, University of Reading, Reading, RG6 6BB, United Kingdom.
Abstract:
Rainfall is hypothesized to be influenced by droplet charge, which is related to the global circuit current flowing through clouds. This is tested through examining a major global circuit current increase following the release of artificial radioactivity. Significant changes occurred in daily rainfall distribution in the Shetland Islands, away from pollution. Daily rainfall changed by 24%, and local clouds optically thickened, within the nuclear weapons test period. This supports expectations of electrically induced microphysical changes in liquid water clouds from additional ionization.
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