Elevated atmospheric deposition and dynamics of mercury in a remote upland forest of southwestern China

Elevated atmospheric deposition and dynamics of mercury in a remote upland forest of southwestern China

2010

Mt. Gongga area in southwest China was impacted by Hg emissions from industrial activities and coal combustion, and annual means of atmospheric TGM and PHg concentrations at a regional background station were 3.98 ng m-3 and 30.7 pg m-3, respectively. This work presents a mass balance study of Hg in an upland forest in this area. Atmospheric deposition was highly elevated in the study area, with the annual mean THg deposition flux of 92.5 μg m-2 yr-1. Total deposition was dominated by dry deposition (71.8%), and wet deposition accounted for the remaining 28.2%. Forest was a large pool of atmospheric Hg, and nearly 76% of the atmospheric input was stored in forest soil. Volatilization and stream outflow were identified as the two major pathways for THg losses from the forest, which yielded mean output fluxes of 14.0 and 8.6 μg m-2 yr-1, respectively.

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Mots clés AGROVOC

altitude analysis atmosphere chemistry china coal combustion forest soils forests kinetics mercury mercury metabolism particulate matter rivers soil soil pollutants trees volatilization

Informations bibliographiques

Publié dans

Environmental pollution

Volume 158 Numéro 6 Pagination 2324 - 2333 ISSN 0269-7491

Editeur

Russian Academy of Science. Southern Scientific Centre. Federal Research Centre

D'autres materias

Dry deposition; Plant leaves; Climatic processes; Elevated atmospheric gases; Growth & development; Wet deposition; Emissions; Air pollutants

Langue

anglais

Note

In the special section: advances of air pollution science: from forest decline to multiple-stress effects on forest ecosystem services / edited by marcus schaub, rainer matyssek and gerhard wieser.

Paper presented at the international conference on air polllution and climate change at contrasting altitude and latitude, held september 7-12, 2009, murten, switzerland.

Includes references

Type

Text; Journal Article

Sur AGRIS depuis: 2024-02-28

Format: MODS

Fournisseur de données

Cette notice bibliographique a été fournie par National Agricultural Library

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Liens

DOI http://dx.doi.org/10.1016/j.envpol.2010.01.032

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