Aerosol number fluxes and concentrations over a southern European urban area
| Autor: | Lucas Alados-Arboledas, Gloria Titos, Juan Andrés Casquero-Vera, Hassan Lyamani, D. Contini, Jose Antonio Benavent-Oltra, G. de A. Moreira, L. Järvi, M. Conte, Francisco José Olmo-Reyes |
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| Přispěvatelé: | Institute for Atmospheric and Earth System Research (INAR), SUSTAINABLE URBAN DEVELOPMENT EMERGING FROM THE MERGER OF CUTTING-EDGE CLIMATE, SOCIAL AND COMPUTER SCIENCES, Helsinki Institute of Sustainability Science (HELSUS), Urban meteorology, Helsinki Institute of Urban and Regional Studies (Urbaria) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Atmospheric Science
010504 meteorology & atmospheric sciences Particle number Population Eddy covariance 010501 environmental sciences Atmospheric sciences Urban area 114 Physical sciences complex mixtures 01 natural sciences Flux (metallurgy) 11. Sustainability Urban air quality education Aerosol number concentrations 0105 earth and related environmental sciences General Environmental Science geography education.field_of_study geography.geographical_feature_category respiratory system Aerosol Current (stream) Environmental science Particle Particles flux |
| Zdroj: | Digibug. Repositorio Institucional de la Universidad de Granada instname |
| Popis: | This work was supported by the Spanish Ministry of Economy and Competitiveness through projects PID2020-120015RB-100, CGL201681092-R, and CGL2017-90884-REDT, by the Andalusia Regional Government through project P18-RT-3820 and P20-00136, by the European Union's Horizon 2020 research and innovation program through project ACTRIS-2 (grant agreement No 654109). This research was partially supported by Project RTI2018.101154.A.I00 funded by MCIN/AEI/10.13039/501100011033/FEDER "Una manera de hacer Europa". The authors thank the Parque de la Ciencias for making this research possible. Juan Andr ' es Casquero-Vera is supported by BES-2017-080015 funded by MCIN/AEI/10.13039/501100011033 and FSE "El FSE invierte en tu futuro". Funding for open access charge: Universidad de Granada/CBUA. Although cities are an important source of aerosol particles, aerosol number flux measurements over urban areas are scarce. These measurements are however important as they can allow us to identify the different sources/sinks of aerosol particles and quantify their emission contributions. Therefore, they can help us to understand the aerosol impacts on human health and climate, and to design effective mitigation strategies through the reduction of urban aerosol emissions. In this work we analyze the aerosol number concentrations and fluxes for particles with diameters larger than 2.5 nm measured by eddy covariance technique at an urban area (Granada city, Spain) from November 2016 to April 2018. This is the first study of particle number flux in an urban area in the Iberian Peninsula and is one of the few current studies that report long-term aerosol number flux measurements. The results suggest that, on average, Granada urban area acted as a net source for atmospheric aerosol particles with median particle number flux of 150 x 10(6) m(-2) s(-1). Downward negative fluxes were observed in only 12% of the analyzed data, and most of them were observed during high aerosol load conditions. Both aerosol number fluxes and concentrations were maximum in winter and 50% larger than those measured in summer due to the increased emissions from domestic heating, burning of residual agricultural waste in the agricultural area surrounding the site, as well as to the lower aerosol dilution effects during winter. The analysis of the seasonal diurnal variability of the aerosol number concentration revealed the significant impact of traffic emissions on aerosol population over Granada urban area in all seasons. It also shows the impact of domestic heating and agricultural waste burning emissions in winter as well as the influence of new particle formation processes in summer and spring seasons. Closer analysis by wind sector demonstrated that both aerosol concentrations and fluxes from urban sector (where high density of anthropogenic sources is located) were lower than those from rural sector (which includes agricultural area but also the main highway of the city). This evidences the strong impact of aerosol emissions from traffic circulating on the highway on aerosol population over our measurement site. Spanish Government PID2020-120015RB-100 CGL201681092-R CGL2017-90884-REDT Andalusia Regional Government P18-RT-3820 P20-00136 European Commission 654109 MCIN/AEI/FEDER "Una manera de hacer Europa" RTI2018.101154.A.I00 FSE "El FSE invierte en tu futuro" Universidad de Granada/CBUA MCIN/AEI BES-2017-080015 |
| Databáze: | OpenAIRE |
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