气候变化领域集成服务门户(CCPortal): Chemical characteristics of size-resolved fog water at an urban site in Nanjing and the summit of Mt. Lu, East China

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DOI	10.1016/j.atmosenv.2021.118667
	Chemical characteristics of size-resolved fog water at an urban site in Nanjing and the summit of Mt. Lu, East China
	Zhang S.; Fan S.; Wang Y.; Ge P.; Hu C.; Zhu D.; Zhang H.
发表日期	2021
ISSN	1352-2310
卷号	263
英文摘要	The chemical characteristics of fog water are closely related to the droplet size. This study used a three-stage Caltech Active Strand Cloud Collector (CASCC) to collect 170 size-resolved fog samples from eight fog events in the winter of 2013–2017 at an urban site in Nanjing and the summit of Mt. Lu. The pH, electrical conductivity (EC), and inorganic ion concentration were analyzed, and the sources of pollutants in size-dependent droplets were discussed according to the local emission source type. The pH, EC, total ion concentration (TIC), and ion composition of fog water at Nanjing were dependent on the droplet size. The TIC of fog water at Nanjing was approximately 10 times that measured at Mt. Lu. The concentration of different chemical species in the droplet was also size-dependent: Ca2+ concentration was higher in larger droplets with the diameter (D) ≥ 22 μm, whereas SO42−, NO3−, and NH4+ concentrations were higher in smaller droplets with D ranging 4–16 μm. The ion concentration of fog water at Mt. Lu first decreased then increased as the fog developed. Owing to the faster drop rate of larger droplets, coarse particles (2.5–10 μm) exhibited a faster response to fog removal, and the final mass concentration of fine particles (<2.5 μm) decreased the most due to competition between deposition and gravity. Different pollution sources exhibited different contribution rates to the chemical components of size-dependent droplets. Soil sources mainly affected the Ca2+ content of large droplets, whereas industrial sources and vehicles affected the NO3− and SO42− concentrations of medium and small droplets. Soil sources, industrial sources, and vehicles were the main sources of fog water at the urban site in Nanjing, whereas industrial sources, vehicles, soil sources, biomass combustion, and secondary aerosols were the main sources of fog water at the summit of Mt. Lu. © 2021 Elsevier Ltd
关键词	Electrical conductivity pH Pollution source contribution Size-dependent droplet Total ion concentration
语种	英语
scopus关键词	Concentration (process); Drops; Electric conductivity; Soils; Urban growth; Vehicles; Water pollution; Electrical conductivity; Fog water; Ion concentrations; Nanjing; Pollution source contribution; Size dependent; Size-dependent droplet; Soil sources; Total ion concentration; Urban site; Fog; concentration (composition); detection method; electrical conductivity; industrial emission; pollutant source; spatiotemporal analysis; urban site; China; Jiangsu; Nanjing [Jiangsu]
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248256
作者单位	Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing, China; School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, Jiangsu 210044, China
推荐引用方式 GB/T 7714	Zhang S.,Fan S.,Wang Y.,et al. Chemical characteristics of size-resolved fog water at an urban site in Nanjing and the summit of Mt. Lu, East China[J],2021,263.
APA	Zhang S..,Fan S..,Wang Y..,Ge P..,Hu C..,...&Zhang H..(2021).Chemical characteristics of size-resolved fog water at an urban site in Nanjing and the summit of Mt. Lu, East China.ATMOSPHERIC ENVIRONMENT,263.
MLA	Zhang S.,et al."Chemical characteristics of size-resolved fog water at an urban site in Nanjing and the summit of Mt. Lu, East China".ATMOSPHERIC ENVIRONMENT 263(2021).