期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 52, 期 3, 页码 1644-1654出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.7b05030
关键词
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资金
- China National Natural Science Foundation [91544213]
- Hong Kong Research Grants Council [C5022-14G]
- Hong Kong Theme-Based Research Scheme [T24-504/17-N]
- Hong Kong PolyU Project of Strategic Importance [1-ZE13]
Particulate chloride (Cr) can be transformed to nitryl chloride (ClNO2) via heterogeneous reaction with nitrogen pentoxide (N2O5) at night. Photolysis of ClNO2 and subsequent reactions of chlorine radical with other gases can significantly affect the atmospheric photochemistry. In China, the only available integrated anthropogenic chloride emission inventory was compiled in the 1990s with low spatial resolution, which hinders assessment of impact of ClNO2 on current air quality. In this study, we developed an up-to-date and high-resolution anthropogenic inventory of hydrogen chloride (HCl) and fine particulate Cl- emissions in China for 2014 with 0.1 degrees X 0.1 degrees resolution. Detailed local data and county-level activity data were collected and complied. The anthropogenic emissions of HCl and fine particulate Cr in 2014 were estimated to be 458 and 486 Gg, respectively. Biomass burning was the largest contributor, accounting for 75% of fine particulate Cr emission and 32% of HCl emission. Northeast China and North China Plain were the largest chloride emitters. The monthly distribution varied in different regions, due to different agricultural activities and climate conditions. This work updates the chloride emission information and improves its spatial and temporal resolution, which enables better quantification of the ClNO2 production and its impact over China.
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