The impact of model resolution on simulated ambient air quality and associated human exposure

Abstract

RESUMEN modelos en estimaciones de la calidad del aire ambiente y la exposición humana asociada. Para ello se tomaron como base los promedios anuales de concentración de NO 2 para la aglomeración urbana de Bruselas y sus alrededores, usando campos simulados mediante el modelo determinístico de escala urbana/regional AURORA con resolución de 1 km. Estas concentraciones de NO 2 se utilizaron para calcular la exposición la exposición disminuyó en 38% cuando la resolución del modelo se redujo de 1 a 64 km. Un análisis sencillo reveló que esta reducción de la exposición puede explicarse por la covarianza entre la concentración y los patrones de densidad de población.ABSTRACT quality and associated human exposure is presented. This is done based on annual mean NO 2 concentration AURORA model at a resolution of 1 km. These NO 2 decreased by 38% when degrading the resolution of the model from 1 to 64 km. A straightforward analysis revealed that this exposure reduction could be explained by the covariance between the concentration and population density patterns.

Health Impact of Air Pollution from Shipping in the Baltic Sea: Effects of Different Spatial Resolutions in Sweden

“…The city-scale model produced a mean estimated population exposure approximately three times higher than the regional model (Table 2). Higher-resolution models have previously been shown to result in higher mean concentrations compared to lower resolution [49]. The estimated mean PM 2.5 population-weighted exposure level of 1.5 µg/m 3 in the city-scale model was relatively high compared with previous studies [5,24].…”

“…Furthermore, city-scale modeling can show a clearer pollution diffusion tendency with much higher concentrations in polluted areas than in the nearby areas, whereas with a coarser resolution, the spatial discrepancies are averaged out, making the distinction in the areas more difficult to determine [53]. City-scale modeling has also been found to be preferable in determining population-weighted exposure in epidemiological studies [49].…”

Intercomparison of the CALMET/CALPUFF Modeling System for Selected Horizontal Grid Resolutions at a Local Scale: A Case Study of the MSWI Plant in Krakow, Poland

“…The impact of topography on the modeling results of atmospheric dispersion using this model system was already noted (e.g., see [3][4][5]). In turn, the impact of the computational grid resolution on the air pollution modeling has been widely discussed thus far only for the mesoscale models with an extended description of chemical transformations in the atmosphere [6][7][8][9][10][11][12][13][14][15].…”