气候变化领域集成服务门户(CCPortal): Characterizations and Potential Formation Pathways of Atmospheric Inorganic Ions at a National Background Site in the Northeastern Qinghai-Tibet Plateau During Autumn Season

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DOI	10.1029/2020JD032819
	Characterizations and Potential Formation Pathways of Atmospheric Inorganic Ions at a National Background Site in the Northeastern Qinghai-Tibet Plateau During Autumn Season
	Han B.; Yang W.; Wang J.; Zhao X.; Yin B.; Wang X.; Geng C.; Dou X.; Xu X.; Bai Z.
发表日期	2020
ISSN	2169897X
卷号	125 期号:21
英文摘要	Atmospheric particulate matter (PM) imposes uncertain impacts on both radiative forcing and human health. Ambient PM has been comprehensively studied in China's megacities, while its compositions, sources, and characterizations in the Qinghai-Tibet Plateau (QTP) are not fully understood. An autumn observation campaign was conducted during 1–14 October 2013 at a national background monitoring station (3,295 m above sea level, a.s.l.) in the QTP. Real time concentrations of inorganic water-soluble ions (WSIs) associated with PM2.5 (PM with aerodynamic diameter equal to or less than 2.5 μm) were measured in addition to PM2.5 concentrations, gaseous pollutants, and meteorological parameters. SO42− was the most abundant WSI (10.0 μg/m3) followed by NH4+ (2.0 μg/m3), and NO3− (1.7 μg/m3). Observed WSI concentrations were higher as compared to other QTP monitoring sites and some remote sites. The levels of SO42− were comparable to concentrations of some urban sites. The correlation analysis disclosed the relationship among WSIs and other gaseous pollutants and discussed the possibilities of biomass burning as the potential sources. Extended aerosol inorganic model (E-AIM) model results revealed that particulate sulfate, nitrate, and ammonium (SNA) existed in both liquid and solid phases. High sulfate and nitrate oxidation ratios indicated strong secondary formation of both SO42− and NO3−. By analyzing the relationship among SOR/NOR, RH, and O3, we found that both photochemical and heterogeneous reactions contributed to the formation of SO42−, while the conversion of NO2 to NO3− was likely to occur via photochemical reactions in the presence of high O3 concentrations and strong sunlight. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	background site; particulate matter; Qinghai-Tibet Plateau; water-soluble ions
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185659
作者单位	State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, China; State Key Laboratory for Environmental Protection Monitoring and Assessment of the Qinghai-Xizang Plateau, Qinghai Environmental Monitoring Center, Xining, China; Qinghai Key Laboratory of Eco-Environmental Monitoring and Assessment, Qinghai Environmental Monitoring Center, Xining, China
推荐引用方式 GB/T 7714	Han B.,Yang W.,Wang J.,et al. Characterizations and Potential Formation Pathways of Atmospheric Inorganic Ions at a National Background Site in the Northeastern Qinghai-Tibet Plateau During Autumn Season[J],2020,125(21).
APA	Han B..,Yang W..,Wang J..,Zhao X..,Yin B..,...&Bai Z..(2020).Characterizations and Potential Formation Pathways of Atmospheric Inorganic Ions at a National Background Site in the Northeastern Qinghai-Tibet Plateau During Autumn Season.Journal of Geophysical Research: Atmospheres,125(21).
MLA	Han B.,et al."Characterizations and Potential Formation Pathways of Atmospheric Inorganic Ions at a National Background Site in the Northeastern Qinghai-Tibet Plateau During Autumn Season".Journal of Geophysical Research: Atmospheres 125.21(2020).