抄録
A 3D lightning mapper consisting of multi LF sensors has been developed to monitor the thunderstorms and charge structure of thunderstorms. We have been conducting observation campaign with the 3D lightning mapper in Kansai, Japan, from October 2012. In this paper, we show 3D source locations of cloud-to-cloud (CC) and cloud-to-ground (CG) flashes and compare with radar reflectivity estimated by a phased array radar with quite high temporal and spatial resolution. Most LF sources are located in high radar reflectivity regions, indicating that the 3D lightning mapper can monitor thunderstorms. It is found that a lightning flash with heavily branches is clearly imaged. With bi-directional leader theory that negative and positive ends of a lightning leader develop simultaneously, we estimate positive and negative charge regions in a thundercloud from LF source locations. Radar reflectivity estimated by the phased array radar support the charge structure estimated by LF source locations.
