Combined Eulerian-Lagrangian Hybrid Modelling System for PM2.5 and Elemental Carbon Source Apportionment at the Urban Scale in Milan
Air quality modeling at the very local scale within an urban area is performed through a hybrid modeling system (HMS) that combines the CAMx Eulerian model the with AUSTAL2000 Lagrangian model. The enhancements obtained by means of the HMS in the reconstruction of the spatial distribution of fine pa...
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doaj-4deeb08285bc4c9fb74ccbd87a3abff02020-11-25T03:53:57ZengMDPI AGAtmosphere2073-44332020-10-01111078107810.3390/atmos11101078Combined Eulerian-Lagrangian Hybrid Modelling System for PM2.5 and Elemental Carbon Source Apportionment at the Urban Scale in MilanGiovanni Lonati0Nicola Pepe1Guido Pirovano2Alessandra Balzarini3Anna Toppetti4Giuseppe Maurizio Riva5Department of Civil and Environmental Engineering, Politecnico di Milano, 20133 Milano, ItalyDepartment of Civil and Environmental Engineering, Politecnico di Milano, 20133 Milano, ItalyRicerca sul Sistema Energetico—RSE Spa, via Rubattino 54, 20134 Milano, ItalyRicerca sul Sistema Energetico—RSE Spa, via Rubattino 54, 20134 Milano, ItalyRicerca sul Sistema Energetico—RSE Spa, via Rubattino 54, 20134 Milano, ItalyRicerca sul Sistema Energetico—RSE Spa, via Rubattino 54, 20134 Milano, ItalyAir quality modeling at the very local scale within an urban area is performed through a hybrid modeling system (HMS) that combines the CAMx Eulerian model the with AUSTAL2000 Lagrangian model. The enhancements obtained by means of the HMS in the reconstruction of the spatial distribution of fine particles (PM2.5) and elemental carbon (EC) concentration are presented for the case-study of Milan city center in Northern Italy. Modeling results are reported for three receptors (a green area, a residential and shopping area, and a congested crossroad on the inner ring road of the city center) selected in order to represent urban sites characterized by both different features in terms of the surrounding built environment and by different exposure to local emission sources. The peculiarity of the three receptors is further highlighted by source apportionment analysis, developed not only with respect to the kind of emission sources but also to the geographical location of the sources within the whole Northern Italy computational domain. Results show that the outcome of the Eulerian model at the local scale is only representative of a background level, similar to the Lagrangian model’s outcome for the green area receptor, but fails to reproduce concentration gradients and hot-spots, driven by local sources’ emissions.https://www.mdpi.com/2073-4433/11/10/1078air qualityhybrid modelingsource apportionmentsource regionsCAMxAUSTAL2000 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Giovanni Lonati Nicola Pepe Guido Pirovano Alessandra Balzarini Anna Toppetti Giuseppe Maurizio Riva |
spellingShingle |
Giovanni Lonati Nicola Pepe Guido Pirovano Alessandra Balzarini Anna Toppetti Giuseppe Maurizio Riva Combined Eulerian-Lagrangian Hybrid Modelling System for PM2.5 and Elemental Carbon Source Apportionment at the Urban Scale in Milan Atmosphere air quality hybrid modeling source apportionment source regions CAMx AUSTAL2000 |
author_facet |
Giovanni Lonati Nicola Pepe Guido Pirovano Alessandra Balzarini Anna Toppetti Giuseppe Maurizio Riva |
author_sort |
Giovanni Lonati |
title |
Combined Eulerian-Lagrangian Hybrid Modelling System for PM2.5 and Elemental Carbon Source Apportionment at the Urban Scale in Milan |
title_short |
Combined Eulerian-Lagrangian Hybrid Modelling System for PM2.5 and Elemental Carbon Source Apportionment at the Urban Scale in Milan |
title_full |
Combined Eulerian-Lagrangian Hybrid Modelling System for PM2.5 and Elemental Carbon Source Apportionment at the Urban Scale in Milan |
title_fullStr |
Combined Eulerian-Lagrangian Hybrid Modelling System for PM2.5 and Elemental Carbon Source Apportionment at the Urban Scale in Milan |
title_full_unstemmed |
Combined Eulerian-Lagrangian Hybrid Modelling System for PM2.5 and Elemental Carbon Source Apportionment at the Urban Scale in Milan |
title_sort |
combined eulerian-lagrangian hybrid modelling system for pm2.5 and elemental carbon source apportionment at the urban scale in milan |
publisher |
MDPI AG |
series |
Atmosphere |
issn |
2073-4433 |
publishDate |
2020-10-01 |
description |
Air quality modeling at the very local scale within an urban area is performed through a hybrid modeling system (HMS) that combines the CAMx Eulerian model the with AUSTAL2000 Lagrangian model. The enhancements obtained by means of the HMS in the reconstruction of the spatial distribution of fine particles (PM2.5) and elemental carbon (EC) concentration are presented for the case-study of Milan city center in Northern Italy. Modeling results are reported for three receptors (a green area, a residential and shopping area, and a congested crossroad on the inner ring road of the city center) selected in order to represent urban sites characterized by both different features in terms of the surrounding built environment and by different exposure to local emission sources. The peculiarity of the three receptors is further highlighted by source apportionment analysis, developed not only with respect to the kind of emission sources but also to the geographical location of the sources within the whole Northern Italy computational domain. Results show that the outcome of the Eulerian model at the local scale is only representative of a background level, similar to the Lagrangian model’s outcome for the green area receptor, but fails to reproduce concentration gradients and hot-spots, driven by local sources’ emissions. |
topic |
air quality hybrid modeling source apportionment source regions CAMx AUSTAL2000 |
url |
https://www.mdpi.com/2073-4433/11/10/1078 |
work_keys_str_mv |
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