@article {26097,
	title = {Comparative Study of Particulate Organosulfates in Contrasting Atmospheric Environments: Field Evidence for the Significant Influence of Anthropogenic Sulfate and NOx},
	journal = {Environmental Science and Technology LettersEnvironmental Science and Technology LettersEnvironmental Science and Technology Letters},
	volume = {7},
	number = {11},
	year = {2020},
	note = {Export Date: 29 December 2020通讯地址: Yu, J.Z.; Division of Environment and Sustainability, Hong Kong University of Science and TechnologyHong Kong; 电子邮件: jian.yu@ust.hk},
	pages = {787-794},
	publisher = {American Chemical Society},
	type = {Article},
	abstract = {Organosulfates (OSs) are an important group of secondary organic aerosols, but the key influential factors of their formation in polluted atmospheres are not well understood. In this study, we monitored particulate OSs (carboxy OSs, hydroxyacetone sulfate, and isoprene-and monoterpene-derived OSs) at an urban site and a regional site in Beijing and examined their compositions and formation pathways under contrasting atmospheric conditions. The quantified OSs were most abundant in the summer at the regional site due to higher biogenic emissions and favorable formation conditions (higher aerosol acidity and humidity), followed by urban summer and winter conditions. Larger fractions of inorganic sulfate were converted to organosulfur when sulfate was less abundant. This implies that OSs would play more important roles in aerosol properties as the decline of sulfate. Monoterpene-derived nitrooxy-OSs were enhanced via NO3oxidation in the summer under high-NOxconditions at night, while the day-night variations in the winter were not as obvious. Among isoprene-OSs, IEPOX (isoprene epoxydiols)-OS formation was clearly suppressed under high-NOxconditions, while other isoprene-OSs that are favored under high-NOxconditions showed increasing formation with NOx. The results highlight that isoprene-OS formation pathways in polluted atmospheres could be different from the IEPOX-dominated regions reported for the low-NOxenvironments in the literature. {\textcopyright} 2020 American Chemical Society. All rights reserved.},
	keywords = {Aerosol properties, aerosols, Atmospheric conditions, Atmospheric environment, Atmospheric humidity, Comparative studies, Formation condition, Formation pathways, Influential factors, isoprene, monoterpenes, Nitrogen oxides, Particles (particulate matter), secondary organic aerosols, Sulfur compounds, Urban growth},
	isbn = {23288930 (ISSN)},
	author = {Y. Wang and Hu, M. and Wang, Y. C. and X. Li and Fang, X. and Tang, R. and Lu, S. and Wu, Y. and Guo, S. and Wu, Z. and Hallquist, M. and J.Z. Yu}
}
