A regional modelling study of halogen chemistry within a volcanic plume of Mt Etna’s Christmas 2018 eruption

Herizo Narivelo (1) , Paul David Hamer (2) , Virginie Marécal (1) , Luke Surl (3, 4, 5) , Tjarda Roberts (3, 6) , Sophie Pelletier (1) , Béatrice Josse (1) , Jonathan Guth (1) , Mickaël Bacles (1) , Simon Warnach (7) , Thomas Wagner (7) , Stefano Corradini (8) , Giuseppe Salerno (9) , Lorenzo Guerrieri (8)

1 CNRM - Centre national de recherches météorologiques
2 NILU - Norwegian Institute for Air Research
3 LPC2E - Laboratoire de Physique et Chimie de l'Environnement et de l'Espace
4 LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales
5 Department of Biosciences [Exeter]
6 LMD - Laboratoire de Météorologie Dynamique (UMR 8539)
7 MPIC - Max-Planck-Institut für Chemie
8 INGV - Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Roma
9 Osservatorio Etneo di Catania

Volcanoes are known to be important emitters of atmospheric gases and aerosols, which for certain volcanoes can include halogen gases and in particular HBr. HBr emitted in this way can undergo rapid atmospheric oxidation chemistry (known as the bromine-explosion) within the volcanic emission plume leading to the production of bromine oxide (BrO) and ozone depletion. In this work, we present the results of a modelling study of a volcanic eruption from Mt Etna that occurred around Christmas 2018 that lasted 6 days. The aims of this study are to demonstrate and evaluate the ability of the regional 3D Chemistry Transport Model MOCAGE to simulate the volcanic halogen chemistry in this case study, to analyse the variability

Domaines: Volcanologie

Herizo Narivelo, Paul David Hamer, Virginie Marécal, Luke Surl, Tjarda Roberts, et al.. A regional modelling study of halogen chemistry within a volcanic plume of Mt Etna’s Christmas 2018 eruption. Atmospheric Chemistry and Physics Discussions, In press, ⟨10.5194/egusphere-2023-184⟩. ⟨insu-04004824v1⟩