DOI: 10.1016/j.atmosenv.2020.117285
论文题名: Towards the coupling of a chemical transport model with a micro-scale Lagrangian modelling system for evaluation of urban NOx levels in a European hotspot
作者: Veratti G. ; Fabbi S. ; Bigi A. ; Lupascu A. ; Tinarelli G. ; Teggi S. ; Brusasca G. ; Butler T.M. ; Ghermandi G.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 223 语种: 英语
英文关键词: Air pollution
; Environmental protection
; Nitrogen oxides
; Particulate emissions
; Urban growth
; Wind
; Modelling systems
; Modena
; Multi model
; Traffic emissions
; WRF-Chem
; Urban transportation
; atmospheric modeling
; atmospheric transport
; background level
; bottom-up approach
; chemical element
; concentration (composition)
; emission inventory
; Lagrangian analysis
; nitrogen oxides
; traffic emission
; urban area
; urban pollution
; air pollutant
; article
; environmental policy
; flow measurement
; human
; Italy
; simulation
; urban area
; wind speed
; Emilia-Romagna
; Italy
; Modena
; Po Valley
; Peru tomato mosaic virus
学科: Modena
; Multi-model approach
; PMSS modelling system
; Traffic emissions
; WRF-Chem
中文摘要: A multi-scale modelling system was developed to provide hourly NOx concentration fields at a building-resolving scale in the urban area of Modena, a city in the middle of the Po Valley (Italy), one of the most polluted areas in Europe. The WRF-Chem model was applied over three nested domains and employed with the aim of reproducing local background concentrations, taking into account meteorological and chemical transformation at the regional scale with nested resolutions of 15 km, 3 km and 1 km. Conversely, the PMSS modelling system was applied to simulate 3D air pollutant dispersion, due to traffic emissions, with a very high-resolution (4 m) on a 6 km × 6 km domain covering the city of Modena. The methodology employed to account for anthropogenic emissions relies on two different strategies. Traffic emissions were based on a bottom-up approach using emission factors suggested by the European Environmental Agency with traffic fluxes estimated by the PTV VISUM model in the urban area of Modena, combined with direct traffic flow measurements performed between October 28 and November 8, 2016 which was used for the hourly vehicle modulation. Other anthropogenic emissions were taken from the TNO-MACC III inventory at the scales resolved by the WRF-Chem model. Simulations were performed for the same period whereby the traffic measurement campaign was carried out. 2 m temperature and 10 m wind speed were captured quite well by the WRF-Chem model with statistical metrics in line with similar case studies related to the Northern Italy. The NOx concentrations reproduced in the Po Valley area by WRF-Chem were on average simulated reasonably well with a general negative bias in almost all the examined rural background monitoring stations. Additionally, the deployment of an emission inventory at the original resolution (7 km) highlighted that increasing resolution from 3 km to 1 km does not generally improve the model performance. Nevertheless, simulated and observed NOx hourly concentrations in the urban area of Modena exhibit a large agreement in particular for urban traffic site where detailed traffic emission estimations proved to be very successful in reproducing the observed NOx trend. At urban background stations, despite a general underestimation of the observed concentrations, the combination of WRF-Chem with PMSS provided daily pattern in line with observations. The analysis of the modelled NOx daily cycle pointed out also that at both traffic and background urban stations the morning NOx peak concentration was on average underestimated. This could be explained with an overestimation of mixing phenomena between 07:30 a.m. and 10:00 a.m. by WRF-Chem which leads to a greater dispersion of NOx along the vertical and thus a morning underestimation. The statistical analysis showed finally that PMSS combined with WRF-Chem at both the resolutions (3 km and 1 km) and at both traffic and background sites fulfilled standard acceptance criteria for urban dispersion model evaluation, confirming that the proposed multi-modelling system can be employed as a tool to support environmental policies, epidemiological studies and urban mobility planning. © 2020 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160958
Appears in Collections: 气候变化与战略
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作者单位: Department of Engineering “Enzo Ferrari”, University of Modena and Reggio Emilia, via Pietro Vivarelli 10, Modena, 41125, Italy; Institute for Advanced Sustainability Studies, Helmholtzstraße 5, Potsdam, 14467, Germany; ARIANET S.r.l., via Gilino 9, Milano, 20128, Italy
Recommended Citation:
Veratti G.,Fabbi S.,Bigi A.,et al. Towards the coupling of a chemical transport model with a micro-scale Lagrangian modelling system for evaluation of urban NOx levels in a European hotspot[J]. Atmospheric Environment,2020-01-01,223