Upgrade of the DAUMOD atmospheric dispersion model to estimate urban background NO<sub>2sub> concentrations

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• 作者：Andrea L. Pineda Rojas<sup> ; sup><sup>apineda@conicet.gov.arsup> ; Laura E. Venegas <sup>lvenegas@fra.utn.edu.arsup>
• 关键词：Urban air quality ; DAUMOD-GRS ; Nitrogen dioxide ; Nitrogen oxides ; Volatile organic compounds ; Buenos Aires
• 刊名：Atmospheric Research
• 出版年：2013
• 出版时间：February, 2013
• 年：2013
• 卷：120-121
• 期：Complete
• 页码：147-154
• 全文大小：545 K

文摘

Ambient concentrations of nitrogen dioxide (NO<sub>2sub>) resulting from the emissions of nitrogen oxides (NO<sub>xsub>) and volatile organic compounds (VOCs) in an urban area may cause adverse impacts on the human health and the natural environment if they exceed the air quality standards. The evaluation of NO<sub>2sub> can be achieved through the application of air quality models including photochemical reactions. DAUMOD is a simple urban scale atmospheric dispersion model which was originally developed to estimate urban background concentrations of inert species. In order to allow the estimation of NO<sub>2sub> concentrations in an urban atmosphere, the DAUMOD model has been recently coupled to the Generic Reaction Set (GRS), a simplified photochemical scheme. This work presents the development of the DAUMOD-GRS model and its first application in the city of Buenos Aires considering high resolution area source NO<sub>xsub> and VOC emissions recently obtained for the area. Estimated hourly NO<sub>2sub> concentrations are compared with the observations from a campaign carried out at a green open area within the city in winter 2001. Results show a good model performance, with NMSE = 0.49, FA2 = 0.676 and FB = ? 0.097. DAUMOD-GRS is applied to obtain the spatial distribution of annual NO<sub>2sub> concentrations in the city. The maximum value is 36 ppb, indicating that annual NO<sub>2sub> concentrations in Buenos Aires are below the Air Quality Standard (53 ppb). In addition, hourly ozone concentrations estimated by DAUMOD-GRS are compared with observed values, giving NMSE = 0.38, FA2 = 0.684 and FB = ? 0.225.