Investigation of Cu cong Seeding Effect during Rainfall Augmentation in India

A. A. Sin’kevich, B. Boe, Yu. P. Mikhailovskii, Yu. A. Dovgalyuk,
N. E. Veremei, V. Gopalakrishnan, P. Murugavel, and S. D. Pawar

The results are presented of complex investigation of clouds in India which were seeded with a glaciogenic reagent from the aircraft. The seeding effect was assessed by the comparison of radar characteristics of the seeded clouds with the characteristics of clouds within the radar field of view. The maximum reflectivity increase in the seeded clouds in comparison with clouds in the natural cycle, an increase in the precipitation flux and specific mass of precipitated hail are observed. The merging of seeded clouds was observed during the study. It is shown that this process affects cloud characteristics resulting in the significant (by several times) increase in the precipitation flux. The measurements of electric discharges registered by the lightning detection network demonstrated that there were no lightning strikes in the seeded clouds, although the calculations indicated an increase in the electric activity of the clouds.