气候变化领域集成服务门户(CCPortal): Long-term characterisation of African dust advection in south-eastern Italy: Influence on fine and coarse particle concentrations, size distributions, and carbon content

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DOI	10.1016/j.atmosres.2019.104690
	Long-term characterisation of African dust advection in south-eastern Italy: Influence on fine and coarse particle concentrations, size distributions, and carbon content
	Conte M.; Merico E.; Cesari D.; Dinoi A.; Grasso F.M.; Donateo A.; Guascito M.R.; Contini D.
发表日期	2020
ISSN	0169-8095
卷号	233
英文摘要	Saharan dust (SD) is a relevant source of mineral particles (PM) for the Mediterranean region with potential impacts on air quality and climate. In this work, a long-term analysis of 56 SD events recorded between 2013 and 2018 at the Environmental-Climate Observatory of Lecce (SE Italy) was performed to investigate the effects and the seasonality of dust advection on PM2.5 and PM10, on carbon content, and on number and mass size distributions. The average duration of events was 2.6 days (10% of days) with a pronounced seasonality, 12.5% during warm seasons and 7.5% during cold seasons. The average contribution to PM10 was 1.5 μg/m3, between 1.4 μg/m3 (cold seasons) and 1.8 μg/m3 (warm seasons). Contribution to PM2.5 was significantly lower and not negligible during warm seasons (0.5 μg/m3). The impact of SD in south-eastern Italy is comparable with that in central Italy rather than to that observed in south-western Italy. Looking at PM10, 70 days exceeding legislation threshold were observed (4.8% of days), 22.9% of these exceedances were during SD. Extreme SD events (contributions > 100 μg/m3) cover 2% of the cases. Comparison of carbon content between SD and non-SD days shows that SD does not influence EC and eBC concentrations; however, SD contributes to secondary organic aerosol in the coarse fraction (PM10-2.5). Size distributions (in number and mass) measured during SD and non-SD days show that SD increases the particle number concentrations for diameters (Dp) larger than about 0.9–1 μm. Maximum increase was for Dp 2.5–3 μm. © 2019 Elsevier B.V.
英文关键词	African dust advection; carbonaceous aerosol; dust size distribution; eBC; EC; OC
学科领域	Advection; Aerosols; Air quality; Carbon; Dust; Size distribution; African dust; Carbonaceous aerosol; Dust size distribution; Long term analysis; Mass size distribution; Mediterranean region; Particle number concentration; Secondary organic aerosols; Particle size analysis; advection; carbon; concentration (composition); dust; particulate matter; seasonality; size distribution; Italy; Lecce; Puglia; Sahara
语种	英语
scopus关键词	Advection; Aerosols; Air quality; Carbon; Dust; Size distribution; African dust; Carbonaceous aerosol; Dust size distribution; Long term analysis; Mass size distribution; Mediterranean region; Particle number concentration; Secondary organic aerosols; Particle size analysis; advection; carbon; concentration (composition); dust; particulate matter; seasonality; size distribution; Italy; Lecce; Puglia; Sahara
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/120542
作者单位	Istituto di Scienze dell'Atmosfera e del Clima, ISAC-CNR, Str. Prv. Lecce-Monteroni km 1.2, Lecce, 73100, Italy; Istituto per la Dinamica dei Processi Ambientali, IDPA-CNR, Via Torino 155, Mestre, VE, Italy; Dipartimento di Scienze e Tecnologie Biologiche e Ambientali, Università del Salento, Lecce, 73100, Italy
推荐引用方式 GB/T 7714	Conte M.,Merico E.,Cesari D.,et al. Long-term characterisation of African dust advection in south-eastern Italy: Influence on fine and coarse particle concentrations, size distributions, and carbon content[J],2020,233.
APA	Conte M..,Merico E..,Cesari D..,Dinoi A..,Grasso F.M..,...&Contini D..(2020).Long-term characterisation of African dust advection in south-eastern Italy: Influence on fine and coarse particle concentrations, size distributions, and carbon content.Atmospheric Research,233.
MLA	Conte M.,et al."Long-term characterisation of African dust advection in south-eastern Italy: Influence on fine and coarse particle concentrations, size distributions, and carbon content".Atmospheric Research 233(2020).