Oral

IAMAS

M03 - Weather modification: theory, practice and technology

Hygroscopic Seeding Simulation Using a Superdroplet-Bin Hybrid Microphysical Scheme

We have developed a Superdroplet-Bin Hybrid Microphysical Scheme to simulate hygroscopic cloud seeding. In this scheme, the Superdroplet method is used to describe the three-dimensional transport, nucleation, and deliquescence processes of hygroscopic seeding agents, while the pure liquid-phase SBM_fast scheme is employed to describe the warm rain processes. This approach allows for more accurate and efficient simulation of the physical responses induced by hygroscopic seeding. Using this scheme, an idealized simulation of a non-precipitating warm cloud process was conducted. The study found that whether large hygroscopic seeding agents with a radius of 25 ��m are released at the cloud top or smaller agents with radii ranging from 0.5 to 4 ��m are released at the cloud base, the liquid-phase particle spectrum broadens, leading to precipitation in the originally non-precipitating warm cloud.