Modeling of episodic particulate matter events using a 3-D air quality model with fine grid: Applications to a pair of cities in the US/Mexico border

被引:22
作者
Choi, Yu-Jin [1 ]
Hyde, Peter
Fernando, H. J. S.
机构
[1] Arizona State Univ, Dept Mech & Aerosp Engn, Environm Fluid Dynam Program, Tempe, AZ 85285 USA
[2] Arizona Dept Environm Qual, Phoenix, AZ 85102 USA
基金
美国国家科学基金会;
关键词
particulate matter; 3D air quality model; dust; high winds; US/Mexico border; semi-arid area;
D O I
10.1016/j.atmosenv.2006.04.025
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
High (episodic) particulate matter (PM) events over the sister cities of Douglas (AZ) and Agua Prieta (Sonora), located in the US-Mexico border, were simulated using the 3D Eulerian air quality model, MODELS-3/CMAQ. The best available input information was used for the simulations, with pollution inventory specified on a fine grid. In spite of inherent uncertainties associated with the emission inventory as well as the chemistry and meteorology of the air quality simulation tool, model evaluations showed acceptable PM predictions, while demonstrating the need for including the interaction between meteorology and emissions in an interactive mode in the model, a capability currently unavailable in MODELS-3/CMAQ when dealing with PM. Sensitivity studies on boundary influence indicate an insignificant regional (advection) contribution of PM to the study area. The contribution of secondary particles to the occurrence of high PM events was trivial. High PM episodes in the study area, therefore, are purely local events that largely depend on local meteorological conditions. The major PM emission sources were identified as vehicular activities on unpaved/paved roads and wind-blown dust. The results will be of immediate utility in devising PM mitigation strategies for the study area, which is one of the US EPA-designated non-attainment areas with respect to PM. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码:5181 / 5201
页数:21
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