DEPENDENCE OF THE SIMULATED SEEDING EFFECTS OF CB CLOUD ON THE TYPES OF THE AGI AGENTS

A one-dimensional kinematic model is used to investigate the effects o f silver iodide seeding in the region of a Cb cloud between isotherms of -8-degrees-C and -12-degrees-C. The agent interaction with cloud at mosphere is simulated by an improved microphysical model version which includes phoretic processes. The behaviour of the different agent typ es is investigated using the maximum values of agent mixing ratios and corresponding agent particle masses and radii. It is shown that the a gent residence time in the seeding zone significantly depends on verti cal velocity. The residence time is comparable to that previously repo rted. On the other side, the final graupel production decreases slight ly when vertical velocity increases, while the corresponding graupel p roduction is quite different for agents used. The main agent nucleatio n mechanisms are the Brownian coagulation of cloud droplets, inertial impact of cloud droplets and deposition nucleation.