Journal article
A regional analysis of the fate and transport of mercury in East Asia and an assessment of major uncertainties
Atmospheric environment (1994), Vol.42(6), pp.1144-1159
2008
DOI: 10.1016/j.atmosenv.2007.10.045
Abstract
The fate and transport of mercury in East Asia is evaluated using the Sulfur Transport and dEposition Model (STEM)-Hg 3-D model. The model calculates mercury transport, transformation and deposition in East Asia during April 2001, the period of the ACE-Asia field campaign. Model predictions of dry and wet deposition are compared with the observations from 10 sampling sites in Japan. The model results are consistent with the observations, but tend to over-predict dry deposition. Sensitivity analysis of predicted results to uncertainties in the mercury reaction rates suggests that the oxidation of Hg
0 to Hg(II) in the gas phase is the dominant pathway for atmospheric mercury removal processes. Simulation based on the most recently published reaction rate constants for gas phase oxidation of Hg
0 to Hg(II) overestimates the production of Hg(II) in the gas phase. The regional mercury budget is calculated which shows that most of the reactive gas phase mercury (RGM) and particulate mercury (Hg
p) are deposited around the source region while 28.5
Mg of Hg
0 is exported out of East Asia during April 2001. The sensitivity analysis in the regional Hg budget to major uncertainties associated with Hg emission estimates and Hg chemistry are also evaluated.
Details
- Title: Subtitle
- A regional analysis of the fate and transport of mercury in East Asia and an assessment of major uncertainties
- Creators
- Li Pan - Center for Global and Regional Environmental Research at U of Iowa, Iowa City, IA 52242, USAGregory R Carmichael - Center for Global and Regional Environmental Research at U of Iowa, Iowa City, IA 52242, USABhupesh Adhikary - Center for Global and Regional Environmental Research at U of Iowa, Iowa City, IA 52242, USAYouhua Tang - Center for Global and Regional Environmental Research at U of Iowa, Iowa City, IA 52242, USADavid Streets - Argonne National Laboratory, DIS/900, 9700 South Cass Avenue, Argonne, IL 60439, USAJung-Hun Woo - NESCAUM, 101 Merrimac. Street 10th Floor, Boston, MA 021114, USAHans R Friedli - National Center for Atmospheric Research, Boulder, CO 80307, USALawrence F Radke - National Center for Atmospheric Research, Boulder, CO 80307, USA
- Resource Type
- Journal article
- Publication Details
- Atmospheric environment (1994), Vol.42(6), pp.1144-1159
- DOI
- 10.1016/j.atmosenv.2007.10.045
- ISSN
- 1352-2310
- eISSN
- 1873-2844
- Publisher
- Elsevier Ltd
- Language
- English
- Date published
- 2008
- Academic Unit
- Civil and Environmental Engineering; Nursing; Chemical and Biochemical Engineering
- Record Identifier
- 9984004189302771
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