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Observed in-plume g...
Observed in-plume gaseous elemental mercury depletion suggests significant mercury scavenging by volcanic aerosols
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- Koenig, Alkuin M. (author)
- Université Grenoble Alpes,Grenoble Alpes University
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- Magand, Olivier (author)
- Université de La Réunion,Université Grenoble Alpes,Grenoble Alpes University
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- Rose, Clemence (author)
- Université Clermont Auvergne,Clermont Auvergne University
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- Di Muro, Andrea (author)
- Université Claude-Bernard Lyon 1,Claude Bernard University Lyon 1,Institut de Physique du Globe de Paris
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- Miyazaki, Yuzo (author)
- Hokkaido University
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- Colomb, Aurelie (author)
- Université Clermont Auvergne,Clermont Auvergne University
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- Rissanen, Matti (author)
- Tampereen Yliopisto,University of Tampere,Helsingin Yliopisto,University of Helsinki
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- Lee, Christopher F. (author)
- University of Colorado at Boulder
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- Koenig, Theodore K. (author)
- Peking University,University of Colorado at Boulder
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- Volkamer, Rainer (author)
- University of Colorado at Boulder
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- Brioude, Jerome (author)
- Université de La Réunion
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- Verreyken, Bert (author)
- Université de La Réunion,Universiteit Gent,Ghent university,Universite de Liège,University of Liège,Belgian Institute for Space Aeronomy (BIRA-IASB)
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- Roberts, Tjarda (author)
- Universite d'Orleans,University of Orléans,Sorbonne Université,Sorbonne University
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- Edwards, Brock A. (author)
- University of Manitoba
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- Sellegri, Karine (author)
- Université Clermont Auvergne,Clermont Auvergne University
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- Arellano, Santiago, 1981 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Kowalski, Philippe (author)
- Institut de Physique du Globe de Paris
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- Aiuppa, Alessandro (author)
- Universita degli Studi di Palermo,University of Palermo
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- Sonke, Jeroen E. (author)
- Universite Paul Sabatier Toulouse III,Paul Sabatier University
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- Dommergue, Aurelien (author)
- Université Grenoble Alpes,Grenoble Alpes University
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(creator_code:org_t)
- 2023
- 2023
- English.
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In: Environmental Science: Atmospheres. - 2634-3606. ; 3:10, s. 1418-1438
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https://doi.org/10.1...
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Abstract
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- Terrestrial volcanism is known to emit mercury (Hg) into the atmosphere. However, despite many years of investigation, its net impact on the atmospheric Hg budget remains insufficiently constrained, in part because the transformations of Hg in volcanic plumes as they age and mix with background air are poorly understood. Here we report the observation of complete gaseous elemental mercury (GEM) depletion events in dilute and moderately aged (& SIM;3-7 hours) volcanic plumes from Piton de la Fournaise on Reunion Island. While it has been suggested that co-emitted bromine could, once photochemically activated, deplete GEM in a volcanic plume, we measured low bromine concentrations in both the gas- and particle-phase and observed complete GEM depletion even before sunrise, ruling out a leading role of bromine chemistry here. Instead, we hypothesize that the GEM depletions were mainly caused by gas-particle interactions with sulfate-rich volcanic particles (mostly of submicron size), abundantly present in the dilute plume. We consider heterogeneous GEM oxidation and GEM uptake by particles as plausible manifestations of such a process and derive empirical rate constants. By extrapolation, we estimate that volcanic aerosols may scavenge 210 Mg y(-1) (67-480 Mg y(-1)) of Hg from the atmosphere globally, acting effectively as atmospheric mercury sink. While this estimate is subject to large uncertainties, it highlights that Hg transformations in aging volcanic plumes must be better understood to determine the net impact of volcanism on the atmospheric Hg budget and Hg deposition pathways.
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
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- By the author/editor
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Koenig, Alkuin M ...
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Magand, Olivier
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Rose, Clemence
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Di Muro, Andrea
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Miyazaki, Yuzo
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Colomb, Aurelie
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show more...
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Rissanen, Matti
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Lee, Christopher ...
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Koenig, Theodore ...
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Volkamer, Rainer
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Brioude, Jerome
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Verreyken, Bert
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Roberts, Tjarda
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Edwards, Brock A ...
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Sellegri, Karine
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Arellano, Santia ...
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Kowalski, Philip ...
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Aiuppa, Alessand ...
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Sonke, Jeroen E.
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Dommergue, Aurel ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Subatomic Physic ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Meteorology and ...
- Articles in the publication
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Environmental Sc ...
- By the university
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Chalmers University of Technology