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Journal Articles (Review Article) Atmospheric Chemistry and Physics Year : 2023

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

Giuseppe Salerno

Abstract

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 of the chemical processes during the plume transport, and to quantify its impact on the composition of the troposphere at a regional scale over the Mediterranean basin.

Domains

Volcanology
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Dates and versions

insu-04004824 , version 1 (25-02-2023)
insu-04004824 , version 2 (11-10-2023)

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Cite

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, 2023, 23, pp.10533-10561. ⟨10.5194/acp-23-10533-2023⟩. ⟨insu-04004824v2⟩
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