This research focused on analyzing the behavior of the hourly average concentrations of PM10 and PM2.5 in relation to vehicular traffic, as well as the effect of relative humidity on these concentrations. Measurements of hourly particulate matter concentrations were recorded by the National Meteorology and Hydrology Service of Peru (SENAMHI) at five surface air quality stations. The profiles of PM10 concentrations are related to traffic behavior, showing high levels of concentrations at peak hours, while the PM2.5 profiles are flatter and better related to traffic in February (summer). The decrease in relative humidity between 80 to 65% in the mornings has a greater effect on the increase in PM10 and PM2.5 concentrations in February than in July (winter), and the increase in relative humidity between 65 to 80 % in the afternoon, it has a greater effect on the decrease in the concentration of PM2.5 in February than in July. The air quality in the north (PPD and CRB stations) and east (SJL station) of the Metropolitan Area of Lima (MAL) are the most polluted. The factors that relate PM10 concentrations with the Peruvian standard in February at these stations were 2.79, 1.78 and 1.26, and in July 2.74, 1.28 and 1.36 respectively. The highest and lowest variability of PM10 and PM2.5 in February and July occurred in the northern area (PPD and SMP stations).
|Number of pages||10|
|Journal||International Journal of Environmental Science and Development|
|State||Published - Jul 2021|
Bibliographical noteFunding Information:
Manuscript received August 17, 2020; revised April 1, 2021. This work was supported in part by National Service of Meteorology and Hydrology (SENAMHI) for having provided information on PM2.5 and PM10 concentrations, as well as the Department of Atmospheric Sciences at the Institute of Astronomy, Geophysics and Atmospheric Sciences (IAG), University of Sao Paulo, Brazil. Research reported in this publication was partially supported by the ―RCO No 032-2019-UNTELS research project ―Análisis Morfológico, Metales y Origen de las Partículas Respirables en la Zona Sur de Lima‖ of the Universidad Nacional Tecnológica de Lima Sur-UNTELS‖.
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- Air pollution
- Air quality
- Particulate matter