| Title: |
Summertime surface PM1 aerosol composition and size by source region at the Lampedusa island in the central Mediterranean Sea |
| Authors: |
Mallet, Marc D.; D'Anna, Barbara; Même, Aurélie; Bove, Maria Chiara; Cassola, Federico; Pace, Giandomenico; Desboeufs, Karine; Di Biagio, Claudia; Doussin, Jean-Francois; Maille, Michel; Massabò, Dario; Sciare, Jean; Zapf, Pascal; di Sarra, Alcide Giorgio; Formenti, Paola |
| Contributors: |
Mallet, Marc D.; D'Anna, Barbara; Même, Aurélie; Bove, Maria Chiara; Cassola, Federico; Pace, Giandomenico; Desboeufs, Karine; Di Biagio, Claudia; Doussin, Jean-Francoi; Maille, Michel; Massabò, Dario; Sciare, Jean; Zapf, Pascal; di Sarra, Alcide Giorgio; Formenti, Paola |
| Publisher Information: |
Copernicus Publications on behalf of the European Geosciences Union; DEU; Göttingen |
| Publication Year: |
2019 |
| Collection: |
Università degli Studi di Genova: CINECA IRIS |
| Description: |
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 methanesulfonic-acid-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 ... |
| Document Type: |
article in journal/newspaper |
| File Description: |
ELETTRONICO |
| Language: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/wos/WOS:000484161200003; volume:19; firstpage:11123; lastpage:11142; numberofpages:20; journal:ATMOSPHERIC CHEMISTRY AND PHYSICS; https://hdl.handle.net/11567/971169 |
| DOI: |
10.5194/acp-19-11123-2019 |
| Availability: |
https://hdl.handle.net/11567/971169; https://doi.org/10.5194/acp-19-11123-2019 |
| Rights: |
info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.7B2CEC0D |
| Database: |
BASE |