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DOI	10.5194/acp-20-7259-2020
	Importance of gas-particle partitioning of ammonia in haze formation in the rural agricultural environment
	Huo J.; Lin Y.; Fu Q.; Guo H.; Lee S.-H.
发表日期	2020
ISSN	16807316
起始页码	7259
结束页码	7269
卷号	20 期号:12
英文摘要	Ammonia in the atmosphere is essential for the formation of fine particles that impact air quality and climate. Despite extensive prior research to disentangle the relationship between ammonia and haze pollution, the role of ammonia in haze formation in high ammonia-emitting regions is still not well understood. Aiming to better understand secondary inorganic aerosol (sulfate, nitrate, ammonium-SNA) formation mechanisms under high-ammonia conditions, 1-year hourly measurement of water-soluble inorganic species (gas and particle) was conducted at a rural supersite in Shanghai. Exceedingly high levels of agricultural ammonia, constantly around 30 μgm-3, were observed. We find that gas-particle partitioning of ammonia (ϵNH+4), as opposed to ammonia concentrations, plays a critical role in SNA formation during the haze period. From an assessment of the effects of various parameters, including temperature (T ), aerosol water content (AWC), aerosol pH, and activity coefficient, it seems that AWC plays predominant regulating roles for ϵNH+4. We propose a self-amplifying feedback mechanism associated with ϵNH+4 for the formation of SNA, which is consistent with diurnal variations in ϵNH+4 AWC, and SNA. Our results imply that a reduction in ammonia emissions alone may not reduce SNA effectively, at least at rural agricultural sites in China. © 2020 Author(s).
关键词	agricultural emission air quality ammonia atmospheric pollution concentration (composition)emission control gas haze particulate matter partitioning rural atmosphere solubility China Shanghai
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/131965
推荐引用方式 GB/T 7714	Huo J.,Lin Y.,Fu Q.,et al. Importance of gas-particle partitioning of ammonia in haze formation in the rural agricultural environment[J]. Atmospheric Chemistry and Physics,2020,20(12).
APA	Huo J.,Lin Y.,Fu Q.,Guo H.,&Lee S.-H..(2020).Importance of gas-particle partitioning of ammonia in haze formation in the rural agricultural environment.,20(12).
MLA	Huo J.,et al."Importance of gas-particle partitioning of ammonia in haze formation in the rural agricultural environment".20.12(2020).