[M-IS19] Atmospheric electricity

[MIS19-02] Comparison of polarimetric parameters with lightning discharge determined by multipoint LF band sensors

★Invited Papers

*Syugo Hayashi¹, Takuya Kishikawa², Masayoshi Ishii¹ (1.Meteorological Research Institute / Japan Meteorological Agency, 2.University of Tsukuba)

Keywords:Atmospheric Electricity, Polarimetric Radar, Lightning Sensor

To investigate the particle distribution and the polarity distribution of the lightning discharge in the thunderstorm and to clarify the behaviors of the precipitation particles, using the three-dimensional lightning discharge location system and X-band multi parameter radar, we analyzed thunderstorm cases occurring on the 30th July 2015 in Osaka plain. As a result, the positive charged of the upper layer is caused by relatively small particles such as ice crystals and snowflakes, and negative charges of the middle layer are caused by relatively large particles such as hail or graupel. The positive charges of the lower layer are brought about by large particles such as hail or graupel in the development stage, various kinds of precipitation particles in the mature stage, and precipitation particles having characteristics of liquid water in the decaying stage. In the decaying stage, the reason why the characteristics of the particle it is thought that the positive charged particle fall from upper layer and melted in the lower warm layer, and it related to the activated lightning discharges in the lower layer.