Please use this identifier to cite or link to this item:
Title: Assessment of potential improvements on regional air quality modelling related with implementation of a detailed methodology for traffic emission estimation
Author: Coelho, Margarida C.
Fontes, Tânia
Bandeira, Jorge M.
Pereira, Sérgio R.
Tchepel, Oxana
Dias, Daniela
Sá, Elisa
Amorim, Jorge H.
Borrego, Carlos
Keywords: Air quality
Numerical modelling
Regional scale
Road traffic
Issue Date: 2014
Publisher: Elsevier
Abstract: The accuracy and precision of air quality models are usually associated with the emission inventories. Thus, in order to assess if there are any improvements on air quality regional simulations using detailed methodology of road traffic emission estimation, a regional air quality modelling system was applied. For this purpose, a combination of top-down and bottom-up approaches was used to build an emission inventory. To estimate the road traffic emissions, the bottom-up approach was applied using an instantaneous emission model (Vehicle Specific Power - VSP methodology), and an average emission model (CORINAIR methodology), while for the remaining activity sectors the top-down approach was used. Weather Research and Forecasting (WRF) and Comprehensive Air quality (CAMx) models were selected to assess two emission scenarios: (i) scenario 1, which includes the emissions from the top-down approach; and (ii) scenario 2, which includes the emissions resulting from integration of top-down and bottom-up approaches. The results show higher emission values for PM10, NOx and HC, for scenario 1, and an inverse behaviour to CO. The highest differences between these scenarios were observed for PM10 and HC, about 55% and 75% higher (respectively for each pollutant) than emissions provided by scenario 2. This scenario gives better results for PM10, CO and O3. For NO2 concentrations better results were obtained with scenario 1. Thus, the results obtained suggest that with the combination of the top-down and bottom-up approaches to emission estimation several improvements in the air quality results can be achieved, mainly for PM10, CO and O3.
Peer review: yes
DOI: 10.1016/j.scitotenv.2013.09.042
ISSN: 0048-9697
Appears in Collections:TEMA - Artigos
CESAM - Artigos
DAO - Artigos
DEM - Artigos

Files in This Item:
File Description SizeFormat 
Coelho et al. - 2014 - Assessment of potential improvements on regional a.pdf1.7 MBAdobe PDFrestrictedAccess

Formato BibTex MendeleyEndnote Degois 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.