气候变化领域集成服务门户(CCPortal): Summertime surface PM1 aerosol composition and size by source region at the Lampedusa island in the central Mediterranean Sea

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DOI	10.5194/acp-19-11123-2019
	Summertime surface PM1 aerosol composition and size by source region at the Lampedusa island in the central Mediterranean Sea
	Mallet M.D.; D'Anna B.; Même A.; Chiara Bove M.; Cassola F.; Pace G.; Desboeufs K.; Di Biagio C.; Doussin J.-F.; Maille M.; Massabò D.; Sciare J.; Zapf P.; Giorgio Di Sarra A.; Formenti P.
发表日期	2019
ISSN	16807316
起始页码	11123
结束页码	11142
卷号	19 期号:17
英文摘要	Measurements of aerosol composition and size distributions were taken during the summer of 2013 at the remote island of Lampedusa in the southern central Mediterranean Sea. These measurements were part of the ChArMEx/ADRIMED (Chemistry and Aerosol Mediterranean Experiment/Aerosol Direct Radiative Forcing on the Mediterranean Climate) framework and took place during Special Observation Period 1a (SOP-1a) from 11 June to 5 July 2013. From compact time-of-flight aerosol mass spectrometer (cToF-AMS) measurements in the size range below 1 μm in aerodynamic diameter (PM1), particles were predominately comprised of ammonium and sulfate. On average, ammonium sulfate contributed 63% to the non-refractory PM1 mass, followed by organics (33 %). The organic aerosol was generally very highly oxidized (f44 values were typically between 0.25 and 0.26). The contribution of ammonium sulfate was generally higher than organic aerosol in comparison to measurements taken in the western Mediterranean but is consistent with studies undertaken in the eastern basin. Source apportionment of organics using a statistical (positive matrix factorization) model revealed four factors: a hydrocarbon-like organic aerosol (HOA), a methanesulfonicacid- related oxygenated organic aerosol (MSA-OOA), a more oxidized oxygenated organic aerosol (MO-OOA) and a less oxidized oxygenated organic aerosol (LO-OOA). The MO-OOA was the dominant factor for most of the campaign (53% of the PM1 OA mass). It was well correlated with SO2-4, highly oxidized and generally more dominant during easterly air masses originating from the eastern Mediterranean and central Europe. The LO-OOA factor had a very similar composition to the MO-OOA factor but was more prevalent during westerly winds, with air masses originating from the Atlantic Ocean, the western Mediterranean and at high altitudes over France and Spain from mistral winds. The MSA-OOA factor contributed an average 12% to the PM1 OA and was more dominant during the mistral winds. The HOA, representing observed primary organic aerosol, only contributed 8%of the average PM1 OA during the campaign. Even though Lampedusa is one of the most remote sites in the Mediterranean, PM1 concentrations (10±5 μgm-3) were comparable to those observed in coastal cities and sites closer to continental Europe. Cleaner conditions corresponded to higher wind speeds. Nucleation and growth of new aerosol particles was observed during periods of northwesterly winds. From a climatology analysis from 1999 to 2012, these periods were much more prevalent during the measurement campaign than during the preceding 13 years. These results support previous findings that highlight the importance of different large-scale synoptic conditions in determining the regional and local aerosol composition and oxidation and also suggest that a non-polluted surface atmosphere over the Mediterranean is rare. © Author(s) 2019.
语种	英语
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/144176
作者单位	LISA, CNRS UMR7583, Université Paris Est Créteil (UPEC), Université de Paris, Institut Pierre Simon Laplace (IPSL), Créteil, France; IRCELYON, CNRS UMR 5652, Univ. Lyon1, Lyon, France; Centre National d'Etudes Spatiales (CNES), Toulouse, France; LCE, CNRS UMR 7376, Aix-Marseille Université, Marseille, France; Department of Physics and INFN, University of Genoa, Genoa, Italy; ARPAL Physical Agents and Air Pollution Sector, La Spezia, Italy; Laboratory for Observations and Analyses of Earth and Climate, ENEA, Rome, Italy; Cyprus Institute, Energy, Environment and Water Research Center, Nicosia, Cyprus; Bruker, Lyon, France; ARPAL CFMI-PC, Genoa, Italy
推荐引用方式 GB/T 7714	Mallet M.D.,D'Anna B.,Même A.,et al. Summertime surface PM1 aerosol composition and size by source region at the Lampedusa island in the central Mediterranean Sea[J],2019,19(17).
APA	Mallet M.D..,D'Anna B..,Même A..,Chiara Bove M..,Cassola F..,...&Formenti P..(2019).Summertime surface PM1 aerosol composition and size by source region at the Lampedusa island in the central Mediterranean Sea.Atmospheric Chemistry and Physics,19(17).
MLA	Mallet M.D.,et al."Summertime surface PM1 aerosol composition and size by source region at the Lampedusa island in the central Mediterranean Sea".Atmospheric Chemistry and Physics 19.17(2019).