Case Study of Aircraft Precipitation Enhancement in Winter in Southern Sichuan Basin

Based on MICAPS data,automatic station data,satellite-derived products and GRAPES silhouette mode products,the aircraft precipitation enhancement on December 13th,2015 was analyzed by using statistical and physical testing method in this paper. The results showed that affected by low trough,there was a precipitation in the south of Sichuan province,and the cloud had catalytic potential. After operation,the effect of this operation was obvious. The cloud in working area sustainable developed with cloud top temperature falling,cloud top height increasing and super cooled layer thickness increasing,precipitation sustainable increased and the concentration of pollutants reduced. This operation impact could last three hours. There was no significant changes in contrast area with inadequate rainfall.