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Assessment of Regional Mercury Deposition and Emission Outflow in Mainland China
Xun Wang;  Che-Jen Lin;  Xinbin Feng;  Wei Yuan;  Xuewu Fu;  Hui Zhang;  Qingru Wu;  Shuxiao Wang
2018
Source PublicationJournal of Geophysical Research: Atmospheres
Volume123Issue:17Pages:9868-9890
Abstract

Mainland China is the largest emission region of anthropogenic mercury (Hg) in the world. There have been concerns regarding the emission outflow and chemical transport budget of Hg in the region. Earlier assessments of Hg chemical transport were based on relatively outdated emission data. Recent estimates for anthropogenic (Wu et al., 2016, ) and natural Hg emissions (X. Wang, Lin, et al., 2016, ) show substantial differences from earlier emission inventories. In this study, we applied the updated Hg emission estimates to reassess the regional transport budget using Community Multiscale Air Quality-Hg v5.1. Our results show that the variation of simulated concentration, deposition, and associated emission outflow of Hg are primarily influenced by the spatial-temporal variation of Hg emissions, monsoon shifts, and particulate matter pollution in China. Total Hg deposition in Mainland China is estimated to be 422Mg/year, and approximately two thirds of the deposition is contributed by domestic emissions. The net Hg transport budget from Mainland China is 511Mg/year, contributing to 10% of Hg deposition in other regions of the world. This reassessment points to a 25% reduction in total annual outflow compared to the previous estimate by Lin et al. (2010, ). Such reduction is mainly caused by changes in Hg emission quantity, speciation, and spatial/temporal distributions. More modeling studies focusing on reducing uncertainties of emission inventories and Hg atmospheric chemistry are needed for continuous assessment of Hg emission outflow in this emission-intensive region.

KeywordMercury Pollution mass Balance cmaq-hg deposition emission Outflow
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8892
Collection环境地球化学国家重点实验室
Affiliation1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China
2.University of Chinese Academy of Sciences, Beijing, China
3.Center for Advances in Water and Air Quality, Lamar University, Beaumont, TX, USA
4.Department of Civil and Environmental Engineering, Lamar University, Beaumont, TX, USA
5.State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China
6.State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing 100084, China
Recommended Citation
GB/T 7714
Xun Wang;Che-Jen Lin;Xinbin Feng;Wei Yuan;Xuewu Fu;Hui Zhang;Qingru Wu;Shuxiao Wang. Assessment of Regional Mercury Deposition and Emission Outflow in Mainland China[J]. Journal of Geophysical Research: Atmospheres,2018,123(17):9868-9890.
APA Xun Wang;Che-Jen Lin;Xinbin Feng;Wei Yuan;Xuewu Fu;Hui Zhang;Qingru Wu;Shuxiao Wang.(2018).Assessment of Regional Mercury Deposition and Emission Outflow in Mainland China.Journal of Geophysical Research: Atmospheres,123(17),9868-9890.
MLA Xun Wang;Che-Jen Lin;Xinbin Feng;Wei Yuan;Xuewu Fu;Hui Zhang;Qingru Wu;Shuxiao Wang."Assessment of Regional Mercury Deposition and Emission Outflow in Mainland China".Journal of Geophysical Research: Atmospheres 123.17(2018):9868-9890.
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