Quantifying traffic, biomass burning and secondary source contributions to atmospheric particle number concentrations at urban and suburban sites
In this study, we propose a new approach to determine the contributions of primary vehicle exhaust (N1ff), primary biomass burning (N1bb) and secondary (N2) particles to mode segregated particle number concentrations. We used simultaneous measurements of aerosol size distribution in the 12–600 nm size range and black carbon (BC) concentration obtained during winter period at urban and suburban sites influenced by biomass burning (BB) emissions. As expected, larger aerosol number concentrations in the 12–25 and 25–100 nm size ranges are observed at the urban site compared to the suburban site. However, similar concentrations of BC are observed at both sites due to the larger contribution of BB particles to the observed BC at suburban (34%) in comparison to urban site (23%). Due to this influence of BB emissions in our study area, the application of the Rodríguez and Cuevas (2007) method, which was developed for areas mainly influenced by traffic emissions, leads to an overestimation of the primary vehicle exhaust particles concentrations by 18% and 26% in urban and suburban sites, respectively, as compared to our new proposed approach. The results show that (1) N2 is the main contributor in all size ranges at both sites, (2) N1ff is the main contributor to primary particles (>70%) in all size ranges at both sites and (3) N1bb contributes significantly to the primary particles in the 25–100 and 100–600 nm size ranges at the suburban (24% and 28%, respectively) and urban (13% and 20%, respectively) sites. At urban site, the N1ff contribution shows a slight increase with the increase of total particle concentration, reaching a contribution of up to 65% at high ambient aerosol concentrations. New particle formation events are an important aerosol source during summer noon hours but, on average, these events do not implicate a considerable contribution to urban particles.
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Language: | English |
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Elsevier
2021-05-10
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Subjects: | Ultrafine particles, Black carbon, Biomass burning, Road traffic emissions, New particle formation, |
Online Access: | http://hdl.handle.net/10261/234773 http://dx.doi.org/10.13039/501100000780 |
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Ultrafine particles Black carbon Biomass burning Road traffic emissions New particle formation Ultrafine particles Black carbon Biomass burning Road traffic emissions New particle formation |
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Ultrafine particles Black carbon Biomass burning Road traffic emissions New particle formation Ultrafine particles Black carbon Biomass burning Road traffic emissions New particle formation Casquero-Vera, Juan Andrés Lyamani, Hassan Titos, Gloria Minguillón, María Cruz Dada, L. Alastuey, Andrés Querol, Xavier Petäjä, T. Olmo, F. J. Alados-Arboledas, Lucas Quantifying traffic, biomass burning and secondary source contributions to atmospheric particle number concentrations at urban and suburban sites |
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In this study, we propose a new approach to determine the contributions of primary vehicle exhaust (N1ff), primary biomass burning (N1bb) and secondary (N2) particles to mode segregated particle number concentrations. We used simultaneous measurements of aerosol size distribution in the 12–600 nm size range and black carbon (BC) concentration obtained during winter period at urban and suburban sites influenced by biomass burning (BB) emissions. As expected, larger aerosol number concentrations in the 12–25 and 25–100 nm size ranges are observed at the urban site compared to the suburban site. However, similar concentrations of BC are observed at both sites due to the larger contribution of BB particles to the observed BC at suburban (34%) in comparison to urban site (23%). Due to this influence of BB emissions in our study area, the application of the Rodríguez and Cuevas (2007) method, which was developed for areas mainly influenced by traffic emissions, leads to an overestimation of the primary vehicle exhaust particles concentrations by 18% and 26% in urban and suburban sites, respectively, as compared to our new proposed approach. The results show that (1) N2 is the main contributor in all size ranges at both sites, (2) N1ff is the main contributor to primary particles (>70%) in all size ranges at both sites and (3) N1bb contributes significantly to the primary particles in the 25–100 and 100–600 nm size ranges at the suburban (24% and 28%, respectively) and urban (13% and 20%, respectively) sites. At urban site, the N1ff contribution shows a slight increase with the increase of total particle concentration, reaching a contribution of up to 65% at high ambient aerosol concentrations. New particle formation events are an important aerosol source during summer noon hours but, on average, these events do not implicate a considerable contribution to urban particles. |
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European Commission |
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European Commission Casquero-Vera, Juan Andrés Lyamani, Hassan Titos, Gloria Minguillón, María Cruz Dada, L. Alastuey, Andrés Querol, Xavier Petäjä, T. Olmo, F. J. Alados-Arboledas, Lucas |
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artículo |
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Ultrafine particles Black carbon Biomass burning Road traffic emissions New particle formation |
author |
Casquero-Vera, Juan Andrés Lyamani, Hassan Titos, Gloria Minguillón, María Cruz Dada, L. Alastuey, Andrés Querol, Xavier Petäjä, T. Olmo, F. J. Alados-Arboledas, Lucas |
author_sort |
Casquero-Vera, Juan Andrés |
title |
Quantifying traffic, biomass burning and secondary source contributions to atmospheric particle number concentrations at urban and suburban sites |
title_short |
Quantifying traffic, biomass burning and secondary source contributions to atmospheric particle number concentrations at urban and suburban sites |
title_full |
Quantifying traffic, biomass burning and secondary source contributions to atmospheric particle number concentrations at urban and suburban sites |
title_fullStr |
Quantifying traffic, biomass burning and secondary source contributions to atmospheric particle number concentrations at urban and suburban sites |
title_full_unstemmed |
Quantifying traffic, biomass burning and secondary source contributions to atmospheric particle number concentrations at urban and suburban sites |
title_sort |
quantifying traffic, biomass burning and secondary source contributions to atmospheric particle number concentrations at urban and suburban sites |
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Elsevier |
publishDate |
2021-05-10 |
url |
http://hdl.handle.net/10261/234773 http://dx.doi.org/10.13039/501100000780 |
work_keys_str_mv |
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dig-idaea-es-10261-2347732022-01-05T08:26:40Z Quantifying traffic, biomass burning and secondary source contributions to atmospheric particle number concentrations at urban and suburban sites Casquero-Vera, Juan Andrés Lyamani, Hassan Titos, Gloria Minguillón, María Cruz Dada, L. Alastuey, Andrés Querol, Xavier Petäjä, T. Olmo, F. J. Alados-Arboledas, Lucas European Commission Minguillón, María Cruz [0000-0002-5464-0391] Alastuey, Andrés [0000-0002-5453-5495] Querol, Xavier [0000-0002-6549-9899] Ultrafine particles Black carbon Biomass burning Road traffic emissions New particle formation In this study, we propose a new approach to determine the contributions of primary vehicle exhaust (N1ff), primary biomass burning (N1bb) and secondary (N2) particles to mode segregated particle number concentrations. We used simultaneous measurements of aerosol size distribution in the 12–600 nm size range and black carbon (BC) concentration obtained during winter period at urban and suburban sites influenced by biomass burning (BB) emissions. As expected, larger aerosol number concentrations in the 12–25 and 25–100 nm size ranges are observed at the urban site compared to the suburban site. However, similar concentrations of BC are observed at both sites due to the larger contribution of BB particles to the observed BC at suburban (34%) in comparison to urban site (23%). Due to this influence of BB emissions in our study area, the application of the Rodríguez and Cuevas (2007) method, which was developed for areas mainly influenced by traffic emissions, leads to an overestimation of the primary vehicle exhaust particles concentrations by 18% and 26% in urban and suburban sites, respectively, as compared to our new proposed approach. The results show that (1) N2 is the main contributor in all size ranges at both sites, (2) N1ff is the main contributor to primary particles (>70%) in all size ranges at both sites and (3) N1bb contributes significantly to the primary particles in the 25–100 and 100–600 nm size ranges at the suburban (24% and 28%, respectively) and urban (13% and 20%, respectively) sites. At urban site, the N1ff contribution shows a slight increase with the increase of total particle concentration, reaching a contribution of up to 65% at high ambient aerosol concentrations. New particle formation events are an important aerosol source during summer noon hours but, on average, these events do not implicate a considerable contribution to urban particles. Juan Andrés Casquero-Vera is funded by MINECO under the predoctoral programme FPI (BES-2017-080015). Gloria Titos is funded by Spanish Ministry of Science and Innovation under postdoctoral program Juan de la Cierva (IJCI-2016-29838). This work was supported by the Spanish Ministry of Economy and Competitiveness through projects CGL2016-81092-R, CGL2017-90884-REDT and RTI2018.101154.A.I00, by the Andalusia Regional Government, University of Granada and FEDER funds through projects B-RNM-496-UGR18 and P18-RT-3820, and by the University of Granada through Plan Propio Programs: Visiting Scholar and Becas Iniciación Investigación. The financial support for EARLINET in the ACTRIS Research Infrastructure Project by the European Union's Horizon 2020 research and innovation program through project ACTRIS-2 (grant agreement No 654109) and ACTRIS-IMP (grant agreement No 871115). Tuukka Petäjä acknowledges funding through Academy of Finland Center of Excellence in Atmospheric Sciences and Academy of Finland projects (1307537, 337549) as well as European Commission via “Smart URBan Solutions for air quality, disasters and city growth”, SMURBS and European Innovation Action “Healthy Outdoor Premises for Everyone”, HOPE. The authors thankfully acknowledge the FEDER program for the instrumentation used in this work and the University of Granada that supported this study through the Excellence Units Program. Special thanks are given to Teresa Soriano and the staff of the Andalusian Institute of Agricultural and Fisheries Research and Training (IFAPA) for their support and kindness. Peer reviewed 2021-03-14T10:07:49Z 2021-03-14T10:07:49Z 2021-05-10 artículo http://purl.org/coar/resource_type/c_6501 Science of the Total Environment 768:145282 (2021) http://hdl.handle.net/10261/234773 10.1016/j.scitotenv.2021.145282 http://dx.doi.org/10.13039/501100000780 en #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/H2020/654109 info:eu-repo/grantAgreement/EC/H2020/871115 Postprint https://doi.org/10.1016/j.scitotenv.2021.145282 Sí embargo_20230510 Elsevier |