Speaker
Description
Optical emissions linked to Terrestrial Gamma-ray Flashes (TGFs) have recently gained significance in both space-based and ground-based observations. These emissions are crucial in comprehending how TGFs are generated during thunderstorms. In this presentation, I will present the first time-resolved leader spectra of the optical component associated with downward TGFs, using a spectroscopic system. Additionally, I will showcase preliminary results of lightning flashes as observed by a photometer array installed at the Telescope Array site. This array shares the same field of view as the high-speed video camera and provides higher timing resolution, reporting on the atmospheric electrical discharge in the UV (associated with the streamer development) and infrared (associated with the stable leader propagation). These findings could illuminate the complex processes underlying the initiation and propagation of Terrestrial Gamma-ray Flashes and lightning flashes during thunderstorms, advancing our understanding of these phenomena.
