3-3-3-3-3-3-3-3-3-3-3-3-3 From: Paul Jarvis <p.jarvis@xxxxxxxxxx> *IAVCEI Scientific Assembly 29 June-4 July 2025* We invite submissions to our session "*Dynamics of volcanic eruption plumes: models and observations"* Volcanic eruption plumes inject tephra and gas up into the atmosphere where they can be transported within umbrella clouds or by the wind, potentially impacting populated areas and infrastructure over 10s or 100s of km. Thus, understanding volcanic plume dynamics is crucial for understanding the tephra hazard on the ground and in the air, as well as for relating eruption deposits to source processes. However, volcanic plumes are complex, multi-phase and turbulent phenomena. Our ability to model volcanic plumes is complicated by challenges in constraining or modelling factors including unsteadiness, tephra sedimentation, particle-turbulence interactions, wind-distortion, variable entrainment, thermal disequilibria, the role of water content and phase transitions, ash aggregation and compressibility. We welcome contributions which enhance the understanding of eruption plumes, including multidisciplinary studies comprising of, but not limited to, one or more of the following: field observations; remote sensing (ground-, aerial- and space-based); and modelling (experimental, theoretical and numerical). *Abstract submissions due 20 December 2024:* *https://on-line-form.eu/iavcei2025sa/abstracts/index.php?coo=1 <https://urldefense.com/v3/__https://on-line-form.eu/iavcei2025sa/abstracts/index.php?coo=1__;!!IKRxdwAv5BmarQ!Y5fgx0ZOCgHhg5CfJPLMD3_ySHOSuCv8fZlFd8V9FSr2rQhMrOlli0l4GRQb0lI6ny0SCOJQF259fD4EcU5r-3diQw$>* Convenors: Jonathan Lemus (Department of Earth Sciences, University of Geneva, Geneva, Switzerland) David Jessop (Laboratoire Magmas et Volcans, Université Clermont Auvergne, France, Clermont-Ferrand, France) Paul Jarvis (GNS Science, New Zealand, Lower Hutt, New Zealand) Audrey Michaud-Dubuy (Laboratoire Magmas et Volcans, Université Clermont Auvergne, France, Clermont-Ferrand, France) Simona Scollo (Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, Sezione di Catania, Catania, Italy) 3-3-3-3-3-3-3-3-3-3-3-3-3 ------------------------------
