Preprints
https://doi.org/10.5194/essd-2021-218
https://doi.org/10.5194/essd-2021-218

  16 Aug 2021

16 Aug 2021

Review status: this preprint is currently under review for the journal ESSD.

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

Mauricio Osses1,3, Néstor Rojas2, Cecilia Ibarra3,4, Víctor Valdebenito1, Ignacio Laengle1, Nicolás Pantoja1, Darío Osses4, Kevin Basoa3, Sebastián Tolvett5, Nicolás Huneeus3,4, Laura Gallardo3,4, and Benjamín Gómez1 Mauricio Osses et al.
  • 1Universidad Técnica Federico Santa María (UTFSM), Santiago, Chile
  • 2Universidad Nacional de Colombia, Bogotá (UNAL), Colombia
  • 3Center for Climate and Resilience Research (CR)2, Santiago, Chile
  • 4Universidad de Chile, Santiago, Chile
  • 5Universidad Tecnológica Metropolitana, Santiago, Chile

Abstract. This description paper presents a detailed and consistent estimate and analysis of exhaust pollutant emissions generated by Chile's road transport activity for the period 1990–2020. The complete database for the period 1990–2020 is available at doi: http://dx.doi.org/10.17632/z69m8xm843.2. Emissions are provided at high-spatial resolution (0.01° × 0.01°) over continental Chile from 18.5 S to 53.2 S, including local pollutants (CO, VOC, NOx, MP2.5), black carbon (BC) and greenhouse gases (CO2, CH4). The methodology considers 70 vehicle types, based on ten vehicle categories, subdivided into two fuel types and seven emission standards. Vehicle activity was calculated based on official databases of vehicle records and vehicle flow counts. Fuel consumption was calculated based on vehicle activity and contrasted with fuel sales, to calibrate the initial dataset. Emission factors come mainly from COPERT 5, adapted to local conditions in the 15 political regions of Chile, based on emission standards and fuel quality. While vehicle fleet has grown fivefold between 1990 and 2020, CO2 emissions had followed this trend at a lower rate and emissions of local pollutants have decreased, due to stricter abatement technologies, better fuel quality and enforcement of emission standards. In other words, there has been decoupling between fleet growth and emissions’ rate of change. Results were contrasted with EDGAR datasets, showing similarities in CO2 estimations and striking differences in PM, BC and CO; in the case of NOx and CH4 there is coincidence only until 2008. In all cases of divergent results, EDGAR estimates higher emissions.

Mauricio Osses et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2021-218', Anonymous Referee #1, 09 Sep 2021
  • RC2: 'Comment on essd-2021-218', Anonymous Referee #2, 13 Sep 2021
  • EC1: 'Comment on essd-2021-218', Hugo Denier van der Gon, 13 Oct 2021

Mauricio Osses et al.

Data sets

High-definition spatial distribution maps of on-road transport exhaust emissions in Chile, 1990 - 2020 Osses, Mauricio; Rojas, Néstor; Ibarra, Cecilia; Valdebenito, Víctor; Laengle, Ignacio; Pantoja, Nicolás; Osses, Darío; Basoa, Kevin; Tolvett, Sebastián; Huneeus, Nicolás; Gallardo, Laura https://doi.org/10.17632/z69m8xm843.2

Mauricio Osses et al.

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Short summary
This paper presents a detailed estimate of on road vehicle emissions for Chile, between 1990–2020, and an analysis of emission trends for greenhouse gases and local pollutants. Data is disaggregated by type of vehicle and region at 0.01° × 0.01°. While vehicle fleet grew fivefold, CO2 emissions increased at a lower rate and local pollutants decreased. These trends can be explained by changes in improved vehicle technologies, better fuel quality and enforcement of emission standards.