1
artículo
Publicado 2004
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The IVE Model has been designed to evaluate environmental conditions of emissions from mobile sources operating in cities. So far, it is being succesfully applied in megacities such as Los Angeles, Santiago, Kajastan, Nairobi, among others, and in 2003 it was succesfully applied also in Lima, the City of Kings. For that purpose, institutional coordinations are made together with the Clean Air National Committee, in order to support this proposal set upon by Riverside University of California and Universidad de Chile. The IVE methodology is based on established protocols such as conduction characteristics, vehicles startings (VOCE units), fleet surveys and videos of the circuits chosen, which were carried out in a severe and technical way, thus obtaining valuable data for the following simulations of greenhouse gases, emission factors, the behaviour pattern of the whole of vehicles in the...
2
artículo
Publicado 2004
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El Modelo IVE se ha diseñado para evaluar las condiciones ambientales de las emisiones de fuentes móviles que operan en las ciudades, a la fecha se viene aplicando exitosamente en megaciudades como los Ángeles, Santiago , Kajastán , Nairobi , entre otras , y en el 2003 se aplicó en forma exitosa en la Ciudad de los Reyes, Lima , para ello se realiza las coordinaciones institucionales con la Comisión Nacional de Aire Limpio para apoyar esta iniciativa que planteaban la Universidad de California Riverside y la Universidad de Chile. La metodología IVE se basa en protocolos establecidos como características de conducción, Partidas de vehículos (unidades VOCE), encuestas de flota y videos de los circuitos elegidos, que se cumplieron en forma rigurosa y técnica, lográndose una data valiosa para las simulaciones posteriores de los gases efecto invernadero, de los factores de emisió...
3
artículo
Publicado 2021
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The implementation of confinement and physical distancing measures to restrict people's activities and transit in the midst of the COVID-19 pandemic allowed us to study how these measures affect the air quality in urban areas with high pollution rates, such as Santiago, Chile. A comparative study between the concentrations of PM10, PM2.5, NOx, CO, and O3 during the months of March to May 2020 and the corresponding concentrations during the same period in 2017–2019 is presented. A combination of surface measurements from the air quality monitoring network of the city, remote satellite measurements, and simulations of traffic activity and road transport emissions allowed us to quantify the change in the average concentrations of each pollutant. Average relative changes of traffic emissions (between 61% and 68%) implied statistically significant concentrations reductions of 54%, 13%, and ...
4
artículo
Publicado 2022
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This study delves into the photochemical atmospheric changes reported globally during the pandemic by analyzing the change in emissions from mobile sources and the contribution of local meteorology to ozone (O3) and particle formation in Bogotá (Colombia), Santiago (Chile), and São Paulo (Brazil). The impact of mobility reductions (50%–80%) produced by the early coronavirus-imposed lockdown was assessed through high-resolution vehicular emission inventories, surface measurements, aerosol optical depth and size, and satellite observations of tropospheric nitrogen dioxide (NO2) columns. A generalized additive model (GAM) technique was also used to separate the local meteorology and urban patterns from other drivers relevant for O3 and NO2 formation. Volatile organic compounds, nitrogen oxides (NOx), and fine particulate matter (PM2.5) decreased significantly due to motorized trip reduc...
