High-resolution spatial-distribution maps of road transport exhaust emissions in Chile, 1990–2020

[摘要] This description paper presents a detailed and consistent estimate andanalysis of exhaust pollutant emissions generated by Chile'sroad transport activity for the period 1990–2020. The complete database forthe period 1990–2020 is available at the following DOI: https://doi.org/10.17632/z69m8xm843.2 (Osses et al., 2021). Emissions areprovided at a high spatial resolution (0.01 ∘   ×  0.01 ∘ ) over continental Chile from 18.5 to 53.2 ∘  S,including local pollutants (CO; volatile organic compounds, VOCs; NO x ; PM 2.5 ), black carbon (BC) andgreenhouse gases (CO 2 , CH 4 ). The methodology considers 70 vehicletypes, based on 10 vehicle categories, subdivided into 2 fuel types and7 emission standards. Vehicle activity was calculated based on officialdatabases of vehicle records and vehicle flow counts. Fuel consumption wascalculated based on vehicle activity and contrasted with fuel sales tocalibrate the initial dataset. Emission factors come mainly from the Computer programme to calculate emissions from roadtransport version 5 (COPERT 5),adapted to local conditions in the 15 political regions of Chile, based onemission standards and fuel quality. While vehicle fleet grew 5-foldbetween 1990 and 2020, CO 2 emissions have followed this trend at alower rate, and emissions of air local pollutants have decreased due tostricter abatement technologies, better fuel quality and enforcement ofemission standards. In other words, there has been decoupling between fleetgrowth and emissions' rate of change. Results were contrasted with globaldatasets (EDGAR, CAMS, CEDS), showing similarities in CO 2 estimationsand striking differences in PM, BC and CO; in the case of NO x and CH 4 there is coincidence only until 2008. In all cases of divergent results,global datasets estimate higher emissions.

[学科分类] 眼科学