Snowfall induced by corona discharge
  We demonstrated for the first time the condensation and precipitation (or snowfall) induced by a corona discharge inside a cloud chamber. Ionic wind was found to have played a more significant role than ions as extra Cloud Condensation Nuclei (CCN). 2.25 g of net snow enhancement was measured after applying a 30 kV corona discharge for 25 min. In comparison with another newly emerging femtosecond laser filamentation method, the snow precipitation induced by the corona discharge has about 4 orders of magnitude higher wall-plug efficiency under similar conditions. 
Jingjing Ju, Tie-Jun Wang, Ruxin Li, Shengzhe Du, Haiyi Sun, Yonghong   Liu, Ye Tian, Yafeng Bai, Yaoxiang Liu, Na Chen, Jin...
physics.gen-ph