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Journal article
Atmospheric wet and litterfall mercury deposition at urban and rural sites in China
Atmospheric chemistry and physics, Vol.16(18), pp.11547-11562
09/19/2016
Web of Science ID: WOS:000384313500001
Abstract
Mercury (Hg) concentrations and deposition fluxes in precipitation and litterfall were measured at multiple sites (six rural sites and an urban site) across a broad geographic area in China. The annual deposition fluxes of Hg in precipitation at rural sites and an urban site were 2.0 to 7.2 and 12.6 +/- 6.5 mu g m(-2) yr(-1), respectively. Wet deposition fluxes of Hg at rural sites showed a clear regional difference with elevated deposition fluxes in the subtropical zone, followed by the temporal zone and arid/semi-arid zone. Precipitation depth is the primary influencing factor causing the variation of wet deposition. Hg fluxes through litterfall ranged from 22.8 to 62.8 mu g m(-2) yr(-1), higher than the wet deposition fluxes by a factor of 3.9 to 8.7 and representing approximately 75% of the total Hg deposition at the forest sites in China. This suggests that uptake of atmospheric Hg by foliage is the dominant pathway to remove atmospheric Hg in forest ecosystems in China. Wet deposition fluxes of Hg at rural sites of China were generally lower compared to those in North America and Europe, possibly due to a combination of lower precipitation depth, lower GOM concentrations in the troposphere and the generally lower cloud base heights at most sites that wash out a smaller amount of GOM and PBM during precipitation events.
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- Title
- Atmospheric wet and litterfall mercury deposition at urban and rural sites in China
- Publication Details
- Atmospheric chemistry and physics, Vol.16(18), pp.11547-11562
- Resource Type
- Journal article
- Publisher
- Copernicus Gesellschaft Mbh
- Number of pages
- 16
- Grant note
- CAS "Light of West China" program 41473025; 41622305; 41430754; 41273145 / National Science Foundation of China; National Natural Science Foundation of China (NSFC) 265113 / Global Mercury Observation System (GMOS) - European Commission 2013CB430003 / National 973 Program of China; National Basic Research Program of China
- Copyright
- © the author(s)
- Identifiers
- WOS:000384313500001; 99381837345606600
- Academic Unit
- Mechanical Engineering; Research Administration and Engagement; Hal Marcus College of Science and Engineering
- Language
- English