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DOI	10.1016/j.atmosres.2019.104815
	Aerosol hygroscopicity: Hygroscopic growth proxy based on visibility for low-cost PM monitoring
	Molnár A.; Imre K.; Ferenczi Z.; Kiss G.; Gelencsér A.
发表日期	2020
ISSN	0169-8095
卷号	236
英文摘要	Visibility is a simple indicator of air quality, and its drastic decrease is often related to poor air quality resulting from an increase in aerosol (particulate matter PM) concentration. Visibility is also related to water vapor due to the hygroscopicity of aerosols. As a result, water vapor may considerably influence PM measurements especially in the case of low-cost PM sensors which typically measure the ambient (wet) size of PM. Several possibilities are available to eliminate the effect of aerosol hygroscopicity on PM10 measurements, and we aimed to discuss and compare three of the methods: gravimetry (mass change of aerosol filters due to RH variation), application of the AIM model (based on aerosol chemical composition) and estimation derived from visibility data. In this work, we discuss how hygroscopic growth factors, obtained from different methods, are related, as well as the relevance of the hygroscopic growth rate derived from visibility observations in PM10 measurements. Moreover, since in PM monitoring – including the low-cost PM sensors – a quasi-real time, appropriate and simple method would be desirable for consideration of aerosol hygroscopicity, we aimed to construct a proxy for this purpose. We found that the visibility-derived mass growth rate could serve as a simple basis for these requirements. © 2019
英文关键词	Aerosol hygroscopicity; Air quality; Low-cost PM sensors; PM measurements; Proxy for aerosol hygroscopicity; Visibility
学科领域	Air quality; Costs; Visibility; Water vapor; Aerosol chemical composition; Aerosol filters; Hygroscopic growth; Hygroscopic growth factor; Low costs; Particulate Matter; Proxy for aerosol hygroscopicity; SIMPLE method; Aerosols; aerosol; air quality; hygroscopicity; monitoring; particulate matter; sensor; visibility
语种	英语
scopus关键词	Air quality; Costs; Visibility; Water vapor; Aerosol chemical composition; Aerosol filters; Hygroscopic growth; Hygroscopic growth factor; Low costs; Particulate Matter; Proxy for aerosol hygroscopicity; SIMPLE method; Aerosols; aerosol; air quality; hygroscopicity; monitoring; particulate matter; sensor; visibility
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120482
作者单位	MTA-PE Air Chemistry Research Group, Egyetem 10, Veszprém, H-8200, Hungary; University of Pannonia, Egyetem 10, Veszprém, H-8200, Hungary; Hungarian Meteorological Service, P.O. Box 39, Budapest, H-1675, Hungary
推荐引用方式 GB/T 7714	Molnár A.,Imre K.,Ferenczi Z.,et al. Aerosol hygroscopicity: Hygroscopic growth proxy based on visibility for low-cost PM monitoring[J],2020,236.
APA	Molnár A.,Imre K.,Ferenczi Z.,Kiss G.,&Gelencsér A..(2020).Aerosol hygroscopicity: Hygroscopic growth proxy based on visibility for low-cost PM monitoring.Atmospheric Research,236.
MLA	Molnár A.,et al."Aerosol hygroscopicity: Hygroscopic growth proxy based on visibility for low-cost PM monitoring".Atmospheric Research 236(2020).