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Open AccessArticle

Robust Analysis of PM2.5 Concentration Measurements in the Ecuadorian Park La Carolina

1
Facultad de Ingeniería y Ciencias Aplicadas, Universidad de Las Américas, Quito170125, Ecuador
2
Departamento de Matemática Aplicada a las Tecnologías de la Información y las Comunicaciones, ETS de Ingeniería y Sistemas de Telecomunicación, Universidad Politécnica de Madrid, 28040 Madrid, Spain
3
Grupo Dinámicas + Lugar, Medio y Sociedad (D+LMS), Universidad de Las Américas, Quito170125, Ecuador
4
Grupo de Biodiversidad, Medio Ambiente y Salud (BIOMAS), Universidad de Las Américas, Quito170125, Ecuador
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(21), 4648; https://doi.org/10.3390/s19214648
Received: 20 August 2019 / Revised: 24 October 2019 / Accepted: 24 October 2019 / Published: 25 October 2019
In this article, a robust statistical analysis of particulate matter (PM2.5) concentration measurements is carried out. Here, the region chosen for the study was the urban park La Carolina, which is one of the most important in Quito, Ecuador, and is located in the financial center of the city. This park is surrounded by avenues with high traffic, in which shopping centers, businesses, entertainment venues, and homes, among other things, can be found. Therefore, it is important to study air pollution in the region where this urban park is located, in order to contribute to the improvement of the quality of life in the area. The preliminary study presented in this article was focused on the robust estimation of both the central tendency and the dispersion of the PM2.5 concentration measurements carried out in the park and some surrounding streets. To this end, the following estimators were used: (i) for robust location estimation: α-trimmed mean, trimean, and median estimators; and (ii) for robust scale estimation: median absolute deviation, semi interquartile range, biweight midvariance, and estimators based on a subrange. In addition, nonparametric confidence intervals were established, and air pollution levels due to PM2.5 concentrations were classified according to categories established by the Quito Air Quality Index. According to these categories, the results of the analysis showed that neither the streets that border the park nor the park itself are at the Alert level. Finally, it can be said that La Carolina Park is fulfilling its function as an air pollution filter. View Full-Text
Keywords: PM2.5 concentration measurements; robust location estimation; robust scale estimation PM2.5 concentration measurements; robust location estimation; robust scale estimation
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MDPI and ACS Style

Hernandez, W.; Mendez, A.; Diaz-Marquez, A.M.; Zalakeviciute, R. Robust Analysis of PM2.5 Concentration Measurements in the Ecuadorian Park La Carolina. Sensors 2019, 19, 4648. https://doi.org/10.3390/s19214648

AMA Style

Hernandez W, Mendez A, Diaz-Marquez AM, Zalakeviciute R. Robust Analysis of PM2.5 Concentration Measurements in the Ecuadorian Park La Carolina. Sensors. 2019; 19(21):4648. https://doi.org/10.3390/s19214648

Chicago/Turabian Style

Hernandez, Wilmar; Mendez, Alfredo; Diaz-Marquez, Angela Maria; Zalakeviciute, Rasa. 2019. "Robust Analysis of PM2.5 Concentration Measurements in the Ecuadorian Park La Carolina" Sensors 19, no. 21: 4648. https://doi.org/10.3390/s19214648

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