<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class="">Dear Colleagues,</div><div class=""><br class=""></div><div class="">We invite you to submit abstracts to the AGU21 session "Physics of Streamers, Leaders, and the Lightning Discharge: Observations and Modeling”, which is focused on the physics of lightning. More info below.</div><div class=""><br class=""></div>Title: AE006 - Physics of Streamers, Leaders, and the Lightning Discharge: Observations and Modeling<div class=""><div class=""><br class=""></div><div class="">Website: <a href="https://agu.confex.com/agu/fm21/prelim.cgi/Session/125495" class="">https://agu.confex.com/agu/fm21/prelim.cgi/Session/125495</a></div><div class=""><br class=""></div><div class="">Description: Lightning is comprised of a variety of processes over a multitude of scales including the initial breakdown stage, fast streamer-based breakdown, leader steps, space stems and space leaders, needles from the lateral surface of hot leader cores, recoil leaders, return strokes, and M-components. Lightning channels promote energy exchange between plasma and neutral atmosphere generating reactive chemical species that drive atmospheric chemistry. In recent years, substantial instrumentation advances have been made in optical, radio-frequency, and energetic radiation imaging of the lightning channels' initiation, propagation, and attachment to ground structures, as well as the return stroke and the subsequent processes taking place inside its decaying channels. Additionally, theoretical modeling of streamers, leaders, and the return stroke has evolved to a stage where direct comparisons between model and observations are now possible. We seek abstracts on natural and laboratory observations, modeling, and theoretical efforts dedicated to advancing our community’s understanding of lightning physics.</div><div class=""><br class=""></div><div class="">The deadline for all submissions is Wednesday, August 4, 2021, at 23:59 Eastern Time. </div><div class=""><br class=""></div><div class="">Sincerely,</div><div class="">Caitano da Silva, Rasha Abbasi, Brian Hare, Mason Quick<br class=""><div class=""><br class=""></div><div class=""><br class=""></div></div></div></body></html>