Simulation of the size-composition distribution of atmospheric nanoparticles over Europe

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http://hdl.handle.net/10138/276977

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Patoulias , D , Fountoukis , C , Riipinen , I , Asmi , A , Kulmala , M & Pandis , S N 2018 , ' Simulation of the size-composition distribution of atmospheric nanoparticles over Europe ' , Atmospheric Chemistry and Physics , vol. 18 , no. 18 , pp. 13639-13654 . https://doi.org/10.5194/acp-18-13639-2018

Title: Simulation of the size-composition distribution of atmospheric nanoparticles over Europe
Author: Patoulias, David; Fountoukis, Christos; Riipinen, Ilona; Asmi, Ari; Kulmala, Markku; Pandis, Spyros N.
Contributor: University of Helsinki, Stockholm University
University of Helsinki, Aerosol-Cloud-Climate -Interactions (ACCI)
University of Helsinki, Institute for Atmospheric and Earth System Research (INAR)
Date: 2018-09-27
Language: eng
Number of pages: 16
Belongs to series: Atmospheric Chemistry and Physics
ISSN: 1680-7316
URI: http://hdl.handle.net/10138/276977
Abstract: PMCAMx-UF, a three-dimensional chemical transport model focusing on the simulation of the ultrafine particle size distribution and composition has been extended with the addition of the volatility basis set (VBS) approach for the simulation of organic aerosol (OA). The model was applied in Europe to quantify the effect of secondary semi-volatile organic vapors on particle number concentrations. The model predictions were evaluated against field observations collected during the PEGASOS 2012 campaign. The measurements included both ground and airborne measurements, from stations across Europe and a zeppelin measuring above Po Valley. The ground level concentrations of particles with a diameter larger than 100 nm (N-100) were reproduced with a daily normalized mean error of 40% and a daily normalized mean bias of -20 %. PMCAMx-UF tended to overestimate the concentration of particles with a diameter larger than 10 nm (N-10) with a daily normalized mean bias of 75 %. The model was able to reproduce, within a factor of 2, 85% of the N-10 and 75% of the N-100 zeppelin measurements above ground. The condensation of organics led to an increase (50 %-120 %) in the N-100 concentration mainly in central and northern Europe, while the N-10 concentration decreased by 10 %-30 %. Including the VBS in PMCAMx-UF improved its ability to simulate aerosol number concentration compared to simulations neglecting organic condensation on ultrafine particles.
Subject: SECONDARY ORGANIC AEROSOL
CHEMICAL-TRANSPORT MODEL
CONDENSATION NUCLEI PRODUCTION
BASIS-SET APPROACH
WILD-LAND FIRES
PARTICLE FORMATION
AIR-QUALITY
NUCLEATION EVENTS
SULFURIC-ACID
NUMBER CONCENTRATIONS
1172 Environmental sciences
114 Physical sciences
116 Chemical sciences
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