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BG | Articles | Volume 16, issue 20
Biogeosciences, 16, 4051–4064, 2019
https://doi.org/10.5194/bg-16-4051-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Biogeosciences, 16, 4051–4064, 2019
https://doi.org/10.5194/bg-16-4051-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 18 Oct 2019

Research article | 18 Oct 2019

Insights from mercury stable isotopes on terrestrial–atmosphere exchange of Hg(0) in the Arctic tundra

Martin Jiskra et al.

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Agnan, Y., Le Dantec, T., Moore, C. W., Edwards, G. C., and Obrist, D.: New Constraints on Terrestrial Surface-Atmosphere Fluxes of Gaseous Elemental Mercury Using a Global Database, Environ. Sci. Technol., 50, 507–524, https://doi.org/10.1021/acs.est.5b04013, 2016. 
Agnan, Y., Douglas, T. A., Helmig, D., Hueber, J., and Obrist, D.: Mercury in the Arctic tundra snowpack: temporal and spatial concentration patterns and trace gas exchanges, The Cryosphere, 12, 1939–1956, https://doi.org/10.5194/tc-12-1939-2018, 2018. 
Bash, J. O. and Miller, D. R.: Growing season total gaseous mercury (TGM) flux measurements over an Acer rubrum L. stand, Atmos. Environ., 43, 5953–5961, https://doi.org/10.1016/j.atmosenv.2009.08.008, 2009. 
Bergquist, B. A. and Blum, J. D.: Mass-dependent and -independent fractionation of Hg isotopes by photoreduction in aquatic systems, Science, 318, 417–420, https://doi.org/10.1126/science.1148050, 2007. 
Blum, J. and Bergquist, B.: Reporting of variations in the natural isotopic composition of mercury, Anal. Bioanal. Chem., 388, 353–359, https://doi.org/10.1007/s00216-007-1236-9, 2007. 
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The tundra plays a pivotal role in Arctic mercury cycling by storing atmospheric mercury deposition and shuttling it to the Arctic Ocean. We used the isotopic fingerprint of mercury to investigate the processes controlling atmospheric mercury deposition. We found that the uptake of atmospheric mercury by vegetation was the major deposition source. Direct deposition to snow or soils only played a minor role. These results improve our understanding of Arctic mercury cycling.
The tundra plays a pivotal role in Arctic mercury cycling by storing atmospheric mercury...
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