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Dynamic Oxidation of Gaseous Mercury in the Arctic Troposphere at Polar Sunrise
Abstract
Gaseous elemental mercury (Hg0) is a globally distributed air toxin with a long atmospheric residence time. Any process that reduces its atmospheric lifetime increases its potential accumulation in the biosphere. Our data from Barrow, AK, at 71 degrees N show that rapid, photochemically driven oxidation of boundary-layer Hg0 after polar sunrise, probably by reactive halogens, creates a rapidly depositing species of oxidized gaseous mercury in the remote Arctic troposphere at concentrations in excess of 900 pg m(-3). This mercury accumulates in the snowpack during polar spring at an accelerated rate in a form that is bioavailable to bacteria and is released with snowmelt during the summer emergence of the Arctic ecosystem. Evidence suggests that this is a recent phenomenon that may be occurring throughout the earth's polar regions.
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Citations
Cited by
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Barkay, T., Miller, S. M., & Summers, A. O. (2003) · FEMS Microbiology Reviews · doi:10.1016/s0168-6445(03)00046-9 · Cited by 1,054
Wiener, J., Krabbenhoft, D., Heinz, G., & Scheuhammer, A. (2002) · Handbook of Ecotoxicology, Second Edition · doi:10.1201/9781420032505.ch16 · Cited by 656
Air-Snow Interactions and Atmospheric Chemistry
Dominé, F., & Shepson, P. B. (2002) · Science · doi:10.1126/science.1074610 · Cited by 477
A synthesis of atmospheric mercury depletion event chemistry in the atmosphere and snow
Steffen, A., Douglas, T., Amyot, M., Ariya, P., Aspmo, K., Berg, T., Bottenheim, J., Brooks, S., Cobbett, F., Dastoor, A., et al. (2008) · Atmospheric Chemistry and Physics · doi:10.5194/acp-8-1445-2008 · Cited by 454
Self-citationGeochemistry of Mercury in the Environment
Fitzgerald, W. F., & Lamborg, C. H. (2014) · Treatise on Geochemistry · doi:10.1016/b978-0-08-095975-7.00904-9 · Cited by 275
Metadata
- Authors
- Lindberg, S. E., Brooks, S., Lin, C.-J., Scott, K. J., Landis, M. S., Stevens, R. K., Goodsite, M., & Richter, A.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2002-02-13
- Volume
- 36
- Issue
- 6
- Pages
- 1245-1256
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W1987969549
- Cited by
- 534
- References
- 0
- FWCI
- 29.71
- Type
- journal article
- Language
- en
- Open access
- closed
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