Comparison of Top-Down and Bottom-Up Road Transport Emissions through High-Resolution Air Quality Modeling in a City of Complex Orography

Vehicular emissions are a predominant source of pollution in urban environments. However, inherent complexities of vehicular behavior are sources of uncertainties in emission inventories (EIs). We compare bottom-up and top-down approaches for estimating road transport EIs in Manizales, Colombia. The...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Felipe Cifuentes, Carlos M. González, Erika M. Trejos, Luis D. López, Francisco J. Sandoval, Oscar A. Cuellar, Sonia C. Mangones, Néstor Y. Rojas, Beatriz H. Aristizábal
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	road transport emission top-down approach bottom-up approach air quality modeling medium-sized Andean cities complex orography city Meteorology. Climatology QC851-999
Acceso en línea:	https://doaj.org/article/fa8f91f51fec4f7792bf129c3d3249b5
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:fa8f91f51fec4f7792bf129c3d3249b5
record_format	dspace
spelling	oai:doaj.org-article:fa8f91f51fec4f7792bf129c3d3249b52021-11-25T16:43:51ZComparison of Top-Down and Bottom-Up Road Transport Emissions through High-Resolution Air Quality Modeling in a City of Complex Orography10.3390/atmos121113722073-4433https://doaj.org/article/fa8f91f51fec4f7792bf129c3d3249b52021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4433/12/11/1372https://doaj.org/toc/2073-4433Vehicular emissions are a predominant source of pollution in urban environments. However, inherent complexities of vehicular behavior are sources of uncertainties in emission inventories (EIs). We compare bottom-up and top-down approaches for estimating road transport EIs in Manizales, Colombia. The EIs were estimated using a COPERT model, and results from both approaches were also compared with the official top-down EI (estimated from IVE methodology). The transportation model PTV-VISUM was used for obtaining specific activity information (traffic volumes, vehicular speed) in bottom-up estimation. Results from COPERT showed lower emissions from the top-down approach than from the bottom-up approach, mainly for NMVOC (−28%), PM<sub>10</sub> (−26%), and CO (−23%). Comparisons showed that COPERT estimated lower emissions than IVE, with higher differences than 40% for species such as PM<sub>10</sub>, NO<sub>X</sub>, and CH<sub>4</sub>. Furthermore, the WRF–Chem model was used to test the sensitivity of CO, O<sub>3</sub>, PM<sub>10</sub>, and PM<sub>2.5</sub> predictions to the different EIs evaluated. All studied pollutants exhibited a strong sensitivity to the emission factors implemented in EIs. The COPERT/top-down was the EI that produced more significant errors. This work shows the importance of performing bottom-up EI to reduce the uncertainty regarding top-down activity data.Felipe CifuentesCarlos M. GonzálezErika M. TrejosLuis D. LópezFrancisco J. SandovalOscar A. CuellarSonia C. MangonesNéstor Y. RojasBeatriz H. AristizábalMDPI AGarticleroad transport emissiontop-down approachbottom-up approachair quality modelingmedium-sized Andean citiescomplex orography cityMeteorology. ClimatologyQC851-999ENAtmosphere, Vol 12, Iss 1372, p 1372 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	road transport emission top-down approach bottom-up approach air quality modeling medium-sized Andean cities complex orography city Meteorology. Climatology QC851-999
spellingShingle	road transport emission top-down approach bottom-up approach air quality modeling medium-sized Andean cities complex orography city Meteorology. Climatology QC851-999 Felipe Cifuentes Carlos M. González Erika M. Trejos Luis D. López Francisco J. Sandoval Oscar A. Cuellar Sonia C. Mangones Néstor Y. Rojas Beatriz H. Aristizábal Comparison of Top-Down and Bottom-Up Road Transport Emissions through High-Resolution Air Quality Modeling in a City of Complex Orography
description	Vehicular emissions are a predominant source of pollution in urban environments. However, inherent complexities of vehicular behavior are sources of uncertainties in emission inventories (EIs). We compare bottom-up and top-down approaches for estimating road transport EIs in Manizales, Colombia. The EIs were estimated using a COPERT model, and results from both approaches were also compared with the official top-down EI (estimated from IVE methodology). The transportation model PTV-VISUM was used for obtaining specific activity information (traffic volumes, vehicular speed) in bottom-up estimation. Results from COPERT showed lower emissions from the top-down approach than from the bottom-up approach, mainly for NMVOC (−28%), PM<sub>10</sub> (−26%), and CO (−23%). Comparisons showed that COPERT estimated lower emissions than IVE, with higher differences than 40% for species such as PM<sub>10</sub>, NO<sub>X</sub>, and CH<sub>4</sub>. Furthermore, the WRF–Chem model was used to test the sensitivity of CO, O<sub>3</sub>, PM<sub>10</sub>, and PM<sub>2.5</sub> predictions to the different EIs evaluated. All studied pollutants exhibited a strong sensitivity to the emission factors implemented in EIs. The COPERT/top-down was the EI that produced more significant errors. This work shows the importance of performing bottom-up EI to reduce the uncertainty regarding top-down activity data.
format	article
author	Felipe Cifuentes Carlos M. González Erika M. Trejos Luis D. López Francisco J. Sandoval Oscar A. Cuellar Sonia C. Mangones Néstor Y. Rojas Beatriz H. Aristizábal
author_facet	Felipe Cifuentes Carlos M. González Erika M. Trejos Luis D. López Francisco J. Sandoval Oscar A. Cuellar Sonia C. Mangones Néstor Y. Rojas Beatriz H. Aristizábal
author_sort	Felipe Cifuentes
title	Comparison of Top-Down and Bottom-Up Road Transport Emissions through High-Resolution Air Quality Modeling in a City of Complex Orography
title_short	Comparison of Top-Down and Bottom-Up Road Transport Emissions through High-Resolution Air Quality Modeling in a City of Complex Orography
title_full	Comparison of Top-Down and Bottom-Up Road Transport Emissions through High-Resolution Air Quality Modeling in a City of Complex Orography
title_fullStr	Comparison of Top-Down and Bottom-Up Road Transport Emissions through High-Resolution Air Quality Modeling in a City of Complex Orography
title_full_unstemmed	Comparison of Top-Down and Bottom-Up Road Transport Emissions through High-Resolution Air Quality Modeling in a City of Complex Orography
title_sort	comparison of top-down and bottom-up road transport emissions through high-resolution air quality modeling in a city of complex orography
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/fa8f91f51fec4f7792bf129c3d3249b5
work_keys_str_mv	AT felipecifuentes comparisonoftopdownandbottomuproadtransportemissionsthroughhighresolutionairqualitymodelinginacityofcomplexorography AT carlosmgonzalez comparisonoftopdownandbottomuproadtransportemissionsthroughhighresolutionairqualitymodelinginacityofcomplexorography AT erikamtrejos comparisonoftopdownandbottomuproadtransportemissionsthroughhighresolutionairqualitymodelinginacityofcomplexorography AT luisdlopez comparisonoftopdownandbottomuproadtransportemissionsthroughhighresolutionairqualitymodelinginacityofcomplexorography AT franciscojsandoval comparisonoftopdownandbottomuproadtransportemissionsthroughhighresolutionairqualitymodelinginacityofcomplexorography AT oscaracuellar comparisonoftopdownandbottomuproadtransportemissionsthroughhighresolutionairqualitymodelinginacityofcomplexorography AT soniacmangones comparisonoftopdownandbottomuproadtransportemissionsthroughhighresolutionairqualitymodelinginacityofcomplexorography AT nestoryrojas comparisonoftopdownandbottomuproadtransportemissionsthroughhighresolutionairqualitymodelinginacityofcomplexorography AT beatrizharistizabal comparisonoftopdownandbottomuproadtransportemissionsthroughhighresolutionairqualitymodelinginacityofcomplexorography
_version_	1718413055937740800

Comparison of Top-Down and Bottom-Up Road Transport Emissions through High-Resolution Air Quality Modeling in a City of Complex Orography

Ejemplares similares