气候变化领域集成服务门户(CCPortal): Size-resolved aerosol pH over Europe during summer

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DOI	10.5194/acp-21-799-2021
	Size-resolved aerosol pH over Europe during summer
	Kakavas S.; Patoulias D.; Zakoura M.; Nenes A.; Pandis S.N.
发表日期	2021
ISSN	1680-7316
起始页码	799
结束页码	811
卷号	21 期号:2
英文摘要	The dependence of aerosol acidity on particle size, location, and altitude over Europe during a summertime period is investigated using the hybrid version of aerosol dynamics in the chemical transport model PMCAMx. The pH changes more with particle size in northern and southern Europe owing to the enhanced presence of non-volatile cations (Na, Ca, K, Mg) in the larger particles. Differences of up to 1 4 pH units are predicted between sub- and supermicron particles, while the average pH of PM1-2.5 can be as much as 1 unit higher than that of PM1. Most aerosol water over continental Europe is associated with PM1, while coarse particles dominate the water content in the marine and coastal areas due to the relatively higher levels of hygroscopic sea salt. Particles of all sizes become increasingly acidic with altitude (0.5 2.5 units pH decrease over 2.5 km) primarily because of the decrease in aerosol liquid water content (driven by humidity changes) with height. Inorganic nitrate is strongly affected by aerosol pH with the highest average nitrate levels predicted for the PM1-5 range and over locations where the pH exceeds 3. Dust tends to increase aerosol pH for all particle sizes and nitrate concentrations for supermicron range particles. This effect of dust is quite sensitive to its calcium content. The size-dependent pH differences carry important implications for pH-sensitive processes in the aerosol. © 2021 Author(s).
语种	英语
scopus关键词	acidity; aerosol; cation; concentration (composition); nitrate; particle size; pH; summer; water content; Europe
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247213
作者单位	Institute of Chemical Engineering Sciences, ICE/FORTH, Patras, Greece; Department of Chemical Engineering, University of Patras, Patras, Greece; École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland; Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, United States
推荐引用方式 GB/T 7714	Kakavas S.,Patoulias D.,Zakoura M.,et al. Size-resolved aerosol pH over Europe during summer[J],2021,21(2).
APA	Kakavas S.,Patoulias D.,Zakoura M.,Nenes A.,&Pandis S.N..(2021).Size-resolved aerosol pH over Europe during summer.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(2).
MLA	Kakavas S.,et al."Size-resolved aerosol pH over Europe during summer".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.2(2021).