
Van-Chased Storms Reveal Trees’ Ultraviolet Corona
Researchers mounted a UV camera on a modified minivan to capture the ultraviolet corona emitted by trees during thunderstorms for the first time. The team observed 41 bursts in sweetgum and loblolly pine across the U.S. East Coast, with each burst emitting billions of photons at around 260 nanometers. This real but previously unobserved glow could influence forest health and atmospheric chemistry and may play a role in thunderstorm electrification, suggesting such coronae occur across forests worldwide.













