1-1-1-1-1-1-1-1-1-1-1-1-1-1 From: Takahiro MIWA <miwao@xxxxxxxxxxx> Dear Colleagues, We would like to invite you to submit your abstract for our session in JpGU-AGU2020. S-VC34: Magma crystallization, fragmentation, and their roles on volcanic eruption Scope: Crystallization of magma during magma ascent in the conduit has a large impact on the dynamics of volcanic eruptions. Magma viscosity and brittleness increase with crystallization. This change of rheological properties may cause brittle fragmentation of low-viscosity basaltic magma during highly explosive subplinian and Plinian eruptions. On the other hand, crystallization may form rigid crystal frameworks, causing efficient outgassing through the interaction between the crystal frameworks and growing gas bubbles in ascending magma, resulting in effusive eruptions. This session aims to integrate information of elementary processes to develop physical models of multiphase magma ascent and eruption. In this view, we welcome innovative and multidisciplinary contributions from experimental volcanologists, numerical modelers, petrologists, and also geophysicists who develop and extend techniques to explore crystallization and bubble-crystal interactions, and their effects on fragmentation and outgassing of multiphase magma during effusive and explosive eruptions. Invited speakers: Atsuko Namiki (Hiroshima Univ), Mike Burton (Univ Manchester) The deadline for the abstract submission is Feb 18 at 17:00JST. We are looking forward to your contributions to our session! Conveners: Takahiro Miwa (NIED) Satoshi Okumura (Tohoku Univ) Pranabendu Moitra (Univ Arizona) 1-1-1-1-1-1-1-1-1-1-1-1-1-1 ------------------------------
