EGU21-12242, updated on 04 Mar 2021
https://doi.org/10.5194/egusphere-egu21-12242
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Long-term evolution of the gas composition of Popocatepetl's plume

Noemie Taquet1, Wolfgang Stremme1, Claudia Rivera1, Alejandro Bezanilla1, Michel Grutter1, Robin Campion2, Sebastien Valade2, Thomas Boulesteix3, Denis Legrand2, Thomas Blumenstock4, and Frank Hase4
Noemie Taquet et al.
  • 1Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, México
  • 2Departamento de Vulcanología, Instituto de Geofísica, Universidad Nacional Autónoma de México, Mexico City, Mexico
  • 3Laboratorio Nacional de Geoquímica y Mineralogía, Universidad Nacional Autónoma de México, Mexico City, Mexico
  • 4Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany

Changes in the eruptive dynamics are mainly controlled by the magma gas content, and the degassing processes impacting the magma viscosity and ascending speed. The progressive exsolution of the gas species, their release at different depths, their mutual interaction and the eventual assimilation of crustal rocks are reflected in the volcanic plume composition changes. Combining long-term ground-based FTIR and UV remote measurements of the Popocatepetl's plume, seismic data and visual monitoring, we explore the relationship between the gas composition changes in the volcanic plume and the transition between extrusive and passive degassing regimes.

SO2, HCl, HF, BrO, SiF4 and CO2 are simultaneously measured in the volcanic plume since 2013 from the Altzomoni observatory, located 12 km north of the crater. We capture several phases of lava dome growth, different types of explosions and passive degassing periods. The evolution of the gas species ratios through these events allows deciphering the degassing processes.

How to cite: Taquet, N., Stremme, W., Rivera, C., Bezanilla, A., Grutter, M., Campion, R., Valade, S., Boulesteix, T., Legrand, D., Blumenstock, T., and Hase, F.: Long-term evolution of the gas composition of Popocatepetl's plume, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-12242, https://doi.org/10.5194/egusphere-egu21-12242, 2021.

Corresponding displays formerly uploaded have been withdrawn.