From AMS Glossary
- The electrical charge borne by precipitation particles.
A very complex and highly variable picture is obtained when charges are measured on individual raindrops or snow crystals and no present theory approaches a complete explanation of all details. In general, more raindrops are positively than negatively charged. Sometimes the prevailing sign of the charges even shifts in the course of a given storm's lifetime.
See precipitation current;
compare ion-capture theory.
Chalmers, J. A. 1957. Atmospheric Electricity. 176–199.