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DOI	10.5194/acp-23-235-2023
	Annual cycle of hygroscopic properties and mixing state of the suburbanaerosol in Athens, Greece
	Spitieri, Christina; Gini, Maria; Gysel-Beer, Martin; Eleftheriadis, Konstantinos
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	235
结束页码	249
卷号	23 期号:1 页码:15
英文摘要	The hygroscopic properties of atmospheric aerosol were investigated at a suburban environment in Athens, Greece, from August 2016 to July 2017. The growth factor distribution probability density function (GF-PDF) and mixing state were determined with a hygroscopicity tandem differential mobility analyser (HTDMA). Four dry particle sizes (D-0) were selected to be analysed in terms of their hygroscopic properties at 90 % relative humidity. The annual mean GFs for D-0 = 30, 50, 80 and 250 nm were found to be equal to 1.28, 1.11, 1.13 and 1.22, respectively. The hygroscopic growth spectra were divided into two distinct hygroscopic ranges: a non- and/or slightly hygroscopic mode (GF < 1.12) and a moderately hygroscopic mode (GF > 1.12), which are representative of a suburban environment influenced by local/urban emissions and background aerosol. The standard deviation sigma of the GF-PDF was employed as a measure of the mixing state of ambient aerosol. The 30 nm particles were mostly internally mixed, whereas larger particles were found to be externally mixed, either with a distinct bimodal structure or with partly overlapping modes. Cluster analysis on the hourly dry number size distributions was performed to identify the link between aerosol hygroscopicity and aerosol emission sources and formation processes. The size distributions were classified into five groups, with the mixed urban and regional background aerosol (67 %) and the fresh traffic-related particles from the neighbourhood urban area (15 %) accounting for more than 80 % of the results. The hygroscopic properties for 50 and 80 nm were found to be similar in all cases, indicating particles of similar nature and origin across these sizes. This was also confirmed through the modal analysis of the average number size distributions for each cluster; the 50 and 80 nm particles were found to belong to the same Aitken mode in most cases. The 250 nm particles (i.e. accumulation mode) were generally more hygroscopic than Aitken particles but less hygroscopic than the 30 nm particles (nuclei mode).
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000908794100001
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/273097
作者单位	National Centre of Scientific Research Demokritos; Swiss Federal Institutes of Technology Domain; Paul Scherrer Institute
推荐引用方式 GB/T 7714	Spitieri, Christina,Gini, Maria,Gysel-Beer, Martin,et al. Annual cycle of hygroscopic properties and mixing state of the suburbanaerosol in Athens, Greece[J],2023,23(1):15.
APA	Spitieri, Christina,Gini, Maria,Gysel-Beer, Martin,&Eleftheriadis, Konstantinos.(2023).Annual cycle of hygroscopic properties and mixing state of the suburbanaerosol in Athens, Greece.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(1),15.
MLA	Spitieri, Christina,et al."Annual cycle of hygroscopic properties and mixing state of the suburbanaerosol in Athens, Greece".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.1(2023):15.