Research on the development of suitable technique of artificial rainfall and the magnification of application environment

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Liquid carbon dioxide was seeded at the seeding rate of 5-10 g/s by aircraft near the cloud bottom of convective or Stratus cloud of -2--5 C. Artificial rainfall experiments succeeded near Miyake and Mikura Islands, Tokyo on Feb. 26-27, 2012, Mar. 14-15 and Dec. 15-16, 2013, and near Karatsu, Saga on Dec. 26, 2013 and near Saijo, Ehime on Dec. 27, 2013. Rain particles hit on the front glass and virga, i.e., airmass with rain was appeared after 0.5 hour of seeding. Developed cloud was recognized by radar and/or satellite image. In case of inversion layer appeared in the cloud, disappeared cloud region was particularly found on the satellite image based on the change of rain from cloud.