THUNDERSTORM ELECTRIFICATION ANALYSIS - THE DEPENDENCE ON THE TEMPERATURE-LWC DIAGRAM

The dependence on liquid water content (LWC) and temperature (T) of th e charge transfer, and in particular its sign, during ice crystal-grau pel collisions is a matter of controversy. Some of the laboratory meas urements do not agree on the general shape of this function, although they agree on the existence of a critical temperature T,, above which there is one sign and below which the opposite one. In this paper, the authors carry out a numerical study to investigate the behavior of th ree charging parameterizations in thunderstorm electrification. This s tudy is carried out on one cloud case study, and a limited set of T-LW C values are present. Surprisingly, the general behavior is the same a mong the three, despite the distinct differences in the charging diagr ams.