Marine and terrestrial contributions to atmospheric deposition fluxes of methylated arsenic species

Esther S. Breuninger; Julie Tolu; Franziska Aemisegger; Iris Thurnherr; Sylvain Bouchet; Adrien Mestrot; Rachele Ossola; Kristopher McNeill; Dariya Tukhmetova; Jochen Vogl; Björn Meermann; Jeroen E. Sonke; Lenny H. E. Winkel

doi:10.1038/s41467-024-53974-z

Marine and terrestrial contributions to atmospheric deposition fluxes of methylated arsenic species

Esther S. Breuninger (Corresponding author), Julie Tolu (Corresponding author), Franziska Aemisegger, Iris Thurnherr, Sylvain Bouchet, Adrien Mestrot, Rachele Ossola, Kristopher McNeill, Dariya Tukhmetova, Jochen Vogl, Björn Meermann, Jeroen E. Sonke, Lenny H. E. Winkel (Corresponding author)

Department of Environmental Geosciences

Publications: Contribution to journal › Article › Peer Reviewed

Abstract

Arsenic, a toxic element from both anthropogenic and natural sources, reaches surface environments through atmospheric cycling and dry and wet deposition. Biomethylation volatilizes arsenic into the atmosphere and deposition cycles it back to the surface, affecting soil-plant systems. Chemical speciation of deposited arsenic is important for understanding further processing in soils and bioavailability. However, the range of atmospheric transport and source signature of arsenic species remain understudied. Here we report significant levels of methylated arsenic in precipitation, cloud water and aerosols collected under free tropospheric conditions at Pic du Midi Observatory (France) indicating long-range transport, which is crucial for atmospheric budgets. Through chemical analyses and moisture source diagnostics, we identify terrestrial and marine sources for distinct arsenic species. Estimated atmospheric deposition fluxes of methylated arsenic are similar to reported methylation rates in soils, highlighting atmospheric deposition as a significant, overlooked source of potentially bioavailable methylated arsenic species impacting plant uptake in soils.

Original language	English
Article number	9623
Journal	Nature Communications
Volume	15
Issue number	1
DOIs	https://doi.org/10.1038/s41467-024-53974-z
Publication status	Published - Dec 2024

Austrian Fields of Science 2012

104023 Environmental chemistry
105208 Atmospheric chemistry
105906 Environmental geosciences

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Breuninger, E. S., Tolu, J., Aemisegger, F., Thurnherr, I., Bouchet, S., Mestrot, A., Ossola, R., McNeill, K., Tukhmetova, D., Vogl, J., Meermann, B., Sonke, J. E., & Winkel, L. H. E. (2024). Marine and terrestrial contributions to atmospheric deposition fluxes of methylated arsenic species. Nature Communications, 15(1), Article 9623. https://doi.org/10.1038/s41467-024-53974-z

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abstract = "Arsenic, a toxic element from both anthropogenic and natural sources, reaches surface environments through atmospheric cycling and dry and wet deposition. Biomethylation volatilizes arsenic into the atmosphere and deposition cycles it back to the surface, affecting soil-plant systems. Chemical speciation of deposited arsenic is important for understanding further processing in soils and bioavailability. However, the range of atmospheric transport and source signature of arsenic species remain understudied. Here we report significant levels of methylated arsenic in precipitation, cloud water and aerosols collected under free tropospheric conditions at Pic du Midi Observatory (France) indicating long-range transport, which is crucial for atmospheric budgets. Through chemical analyses and moisture source diagnostics, we identify terrestrial and marine sources for distinct arsenic species. Estimated atmospheric deposition fluxes of methylated arsenic are similar to reported methylation rates in soils, highlighting atmospheric deposition as a significant, overlooked source of potentially bioavailable methylated arsenic species impacting plant uptake in soils.",

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AU - Breuninger, Esther S.

AU - Tolu, Julie

AU - Aemisegger, Franziska

AU - Thurnherr, Iris

AU - Bouchet, Sylvain

AU - Mestrot, Adrien

AU - Ossola, Rachele

AU - McNeill, Kristopher

AU - Tukhmetova, Dariya

AU - Vogl, Jochen

AU - Meermann, Björn

AU - Sonke, Jeroen E.

AU - Winkel, Lenny H. E.

PY - 2024/12

Y1 - 2024/12

N2 - Arsenic, a toxic element from both anthropogenic and natural sources, reaches surface environments through atmospheric cycling and dry and wet deposition. Biomethylation volatilizes arsenic into the atmosphere and deposition cycles it back to the surface, affecting soil-plant systems. Chemical speciation of deposited arsenic is important for understanding further processing in soils and bioavailability. However, the range of atmospheric transport and source signature of arsenic species remain understudied. Here we report significant levels of methylated arsenic in precipitation, cloud water and aerosols collected under free tropospheric conditions at Pic du Midi Observatory (France) indicating long-range transport, which is crucial for atmospheric budgets. Through chemical analyses and moisture source diagnostics, we identify terrestrial and marine sources for distinct arsenic species. Estimated atmospheric deposition fluxes of methylated arsenic are similar to reported methylation rates in soils, highlighting atmospheric deposition as a significant, overlooked source of potentially bioavailable methylated arsenic species impacting plant uptake in soils.

AB - Arsenic, a toxic element from both anthropogenic and natural sources, reaches surface environments through atmospheric cycling and dry and wet deposition. Biomethylation volatilizes arsenic into the atmosphere and deposition cycles it back to the surface, affecting soil-plant systems. Chemical speciation of deposited arsenic is important for understanding further processing in soils and bioavailability. However, the range of atmospheric transport and source signature of arsenic species remain understudied. Here we report significant levels of methylated arsenic in precipitation, cloud water and aerosols collected under free tropospheric conditions at Pic du Midi Observatory (France) indicating long-range transport, which is crucial for atmospheric budgets. Through chemical analyses and moisture source diagnostics, we identify terrestrial and marine sources for distinct arsenic species. Estimated atmospheric deposition fluxes of methylated arsenic are similar to reported methylation rates in soils, highlighting atmospheric deposition as a significant, overlooked source of potentially bioavailable methylated arsenic species impacting plant uptake in soils.

UR - https://www.scopus.com/pages/publications/85209078812

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DO - 10.1038/s41467-024-53974-z

M3 - Article

SN - 2041-1723

VL - 15

JO - Nature Communications

JF - Nature Communications

IS - 1

M1 - 9623

ER -

Marine and terrestrial contributions to atmospheric deposition fluxes of methylated arsenic species

Abstract

Austrian Fields of Science 2012

UN SDGs

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