Article Dans Une Revue Environmental Pollution Année : 2024

The seasonal change of PAHs in Svalbard surface snow

Jean-Charles Gallet

Résumé

The Arctic region is threatened by contamination deriving from both long-range pollution and local human activities. Polycyclic Aromatic Hydrocarbons (PAHs) are environmental tracers of emission, transport and deposition processes. A first campaign has been conducted at Ny-Ålesund, Svalbard, from October 2018 to May 2019, monitoring weekly concentrations of PAHs in Arctic surface snow. The trend of the 16 high priority PAH compounds showed that long-range inputs occurred mainly in the winter, with concentrations ranging from 0.8 ng L-1 to 37 ng L-1. In contrast to this, the most abundant analyte retene, showed an opposite seasonal trend with highest values in autumn and late spring (up to 97 ng L-1), while in winter this compound remained below 3 ng L-1. This is most likely due to local contributions from outcropping coal deposits and stockpiles. Our results show a general agreement with the atmospheric signal, although significant skews can be attributed to postdepositional processes, wind erosion, melting episodes and redistribution. ☆ This paper has been recommended for acceptance by Eddy Y. Zeng.

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hal-04396966 , version 1 (16-01-2024)

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Marco Vecchiato, Carlo Barbante, Elena Barbaro, François Burgay, Warren Rl. Cairns, et al.. The seasonal change of PAHs in Svalbard surface snow. Environmental Pollution, 2024, 340, pp.122864. ⟨10.1016/j.envpol.2023.122864⟩. ⟨hal-04396966⟩
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