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Volcanic Plumes: Impacts on the Atmosphere and Insights into Volcanic Processes
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Geosciences 2018, 8(6), 198; https://doi.org/10.3390/geosciences8060198

Volcanic Plume Impact on the Atmosphere and Climate: O- and S-Isotope Insight into Sulfate Aerosol Formation

Sorbonne Université, CNRS-INSU, Institut des Sciences de la Terre Paris, ISTeP UMR 7193, F-75005 Paris, France
Received: 4 May 2018 / Revised: 22 May 2018 / Accepted: 26 May 2018 / Published: 31 May 2018
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Abstract

The impact of volcanic eruptions on the climate has been studied over the last decades and the role played by sulfate aerosols appears to be major. S-bearing volcanic gases are oxidized in the atmosphere into sulfate aerosols that disturb the radiative balance on earth at regional to global scales. This paper discusses the use of the oxygen and sulfur multi-isotope systematics on volcanic sulfates to understand their formation and fate in more or less diluted volcanic plumes. The study of volcanic aerosols collected from air sampling and ash deposits at different distances from the volcanic systems (from volcanic vents to the Earth poles) is discussed. It appears possible to distinguish between the different S-bearing oxidation pathways to generate volcanic sulfate aerosols whether the oxidation occurs in magmatic, tropospheric, or stratospheric conditions. This multi-isotopic approach represents an additional constraint on atmospheric and climatic models and it shows how sulfates from volcanic deposits could represent a large and under-exploited archive that, over time, have recorded atmospheric conditions on human to geological timescales. View Full-Text
Keywords: volcanic sulfate aerosols; oxygen and sulfur multi-isotopes; atmospheric chemistry volcanic sulfate aerosols; oxygen and sulfur multi-isotopes; atmospheric chemistry
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Martin, E. Volcanic Plume Impact on the Atmosphere and Climate: O- and S-Isotope Insight into Sulfate Aerosol Formation. Geosciences 2018, 8, 198.

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