气候变化领域集成服务门户(CCPortal): Study of new particle formation events in southern Italy

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DOI	10.1016/j.atmosenv.2020.117920
	Study of new particle formation events in southern Italy
	Dinoi A.; Weinhold K.; Wiedensohler A.; Contini D.
发表日期	2021
ISSN	13522310
卷号	244
英文摘要	New particle formation (NPF) events were studied in the urban background of Lecce (Italy) at the ECO Environmental-Climate Observatory, GAW/ACTRIS regional station. The objective of this study was to obtain long-term information on nucleation phenomenon in the Salentum peninsula, a coastal area of the central Mediterranean basin for which no extensive data exists. Particle number size distributions of the atmospheric aerosol were continuously collected by a Mobility Particle Size Spectrometer (MPSS) in the size range of 10–800 nm. For this investigation, data was analyzed for the period from January 2015 to July 2016 together with simultaneous measurements of gaseous pollutants (SO2, NO, NO2, and O3) and meteorological parameters. Throughout the observation period, nucleation events have been identified in approximately 21% of days. The classification of the events showed a seasonal trend with higher frequencies in warm seasons with a maximum in September (38%) while the highest non-event days fraction was observed in cold seasons, ~90% in November and December. The fraction of undefined days peaked in August and September, 15 and 19% respectively. The analysis of reactive gas showed that NO, NO2, and O3 did not play an evident role in the formation process, as observed by the comparison between event and non-event monthly median concentrations. Nucleation phenomenon seemed instead to be very sensitive to SO2 that was present with higher (about 40%) monthly median concentrations during event days compared to non-event days. The condensation sink (CS), calculated for the complete observational period, showed similar values comparing event and non-event days. It is noteworthy that all the events occurred during the central hours of the day, high pressure, dry air (RH<55%) and without significant cloud cover. The event days were characterized by winds originating predominately from the north and northwest directions, as shown by the analysis of the back-trajectories. © 2020 Elsevier Ltd
英文关键词	Aerosol size distribution; Meteorological parameters; New particle formation; Nucleation; Ultrafine particles
语种	英语
scopus关键词	Atmospheric aerosols; Crystallization; Fog; Nitrogen oxides; Nucleation; Particle size; Sulfur dioxide; Central Mediterranean; Gaseous pollutants; Higher frequencies; Median concentration; Meteorological parameters; New particle formation; Particle number size distribution; Simultaneous measurement; Particle size analysis; nitric oxide; nitrogen dioxide; ozone; sulfur dioxide; aerosol; aerosol formation; concentration (composition); long-term change; nucleation; observatory; urban area; aerosol; air and air related phenomena; air pollutant; Article; atmosphere; atmospheric pressure; cloud; cold; comparative study; concentration (parameter); condensation sink; dry air; humidity; Italy; meteorological phenomena; meteorology; new particle formation; particle number size distribution; particle size; priority journal; seashore; seasonal variation; trend study; ultrafine particulate matter; warming; wind; Italy; Lecce; Puglia
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/144865
作者单位	Institute of Atmospheric Sciences and Climate, ISAC-CNR, S. P. Lecce-Monteroni Km 1.2, Lecce, 73100, Italy; Leibniz Institute for Tropospheric Research, Leipzig, 04318, Germany
推荐引用方式 GB/T 7714	Dinoi A.,Weinhold K.,Wiedensohler A.,et al. Study of new particle formation events in southern Italy[J],2021,244.
APA	Dinoi A.,Weinhold K.,Wiedensohler A.,&Contini D..(2021).Study of new particle formation events in southern Italy.Atmospheric Environment,244.
MLA	Dinoi A.,et al."Study of new particle formation events in southern Italy".Atmospheric Environment 244(2021).