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Volume 18, issue 24
Atmos. Chem. Phys., 18, 17909-17931, 2018
https://doi.org/10.5194/acp-18-17909-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Chem. Phys., 18, 17909-17931, 2018
https://doi.org/10.5194/acp-18-17909-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 18 Dec 2018

Research article | 18 Dec 2018

Photochemical box modelling of volcanic SO2 oxidation: isotopic constraints

Tommaso Galeazzo et al.
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Aiuppa, A.: Degassing of halogens from basaltic volcanism: Insights from volcanic gas observations, Chem. Geol., 263, 99–109, https://doi.org/10.1016/j.chemgeo.2008.08.022, 2009.
Aiuppa, A., Inguaggiato, S., McGonigle, A. J., O'Dwyer, M., Oppenheimer, C., Padgett, M. J., Rouwet, D., and Valenza, M.: H2S fluxes from Mt. Etna, Stromboli, and Vulcano (Italy) and implications for the sulfur budget at volcanoes, Geochim. Cosmochim. Ac., 69, 1861–1871, https://doi.org/10.1016/j.gca.2004.09.018, 2005.
Aiuppa, A., Federico, C., Giudice, G., Gurrieri, S., Liuzzo, M., Shinohara, H., Favarra, R., and Valenza, M.: Rates of carbon dioxide plume degassing from Mount Etna volcano, J. Geophys. Res.-Sol. Ea., 111, 1–8, https://doi.org/10.1029/2006JB004307, 2006.
Aiuppa, A., Franco, A., von Glasow, R., Allen, A. G., D'Alessandro, W., Mather, T. A., Pyle, D. M., and Valenza, M.: The tropospheric processing of acidic gases and hydrogen sulphide in volcanic gas plumes as inferred from field and model investigations, Atmos. Chem. Phys., 7, 1441–1450, https://doi.org/10.5194/acp-7-1441-2007, 2007.
Alexander, B., Savarino, J., Barkov, N. I., Delmas, R. J., and Thiemens, M. H.: Climate driven changes in the oxidation pathways of atmospheric sulfur, Geophys. Res. Lett., 29, 30–1–30–4, https://doi.org/10.1029/2002GL014879, 2002.
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Volcanic sulfur can have climatic impacts for the planet via sulfate aerosol formation, leading also to pollution events. We provide model constraints on tropospheric volcanic sulfate formation, with implications for its lifetime and impacts on regional air quality. Oxygen isotope investigations from our model suggest that in the poor tropospheric plumes of halogens, the O2/TMI sulfur oxidation pathway might significantly control sulfate production. The produced sulfate has no isotopic anomaly.
Volcanic sulfur can have climatic impacts for the planet via sulfate aerosol formation, leading...
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