Evaluation of Weather Modification by Aircraft by the Use of CINDAR

By the use of GPS and CINDAR, the physical tests were made for the operation of weather modification in Guangxi on 16 February, 2008 and 21 January, 2010. The study shows that after the cloud seeding, microphysical changes in the supercooled clouds may lead to the mitigation of the basic reflectivity of radar in the supercooled layer of cloud, while the enhancement of the basic reflectivity on radar in the warm cloud and rain layer, and the reflectivity over the targeted regions was more quickly in reaching the maximum value than the non-operated clouds which are under the similar conditions, and lasting a more longer period. After the cloud seeding, the maximum of the changing rate of the echo reflectivity in warm region may be 100% or more.