Analysis of the particulate matter concentrations PM2.5 and the weather variables of precipitation and temperature in the dry period (2018) and rainy period (2019)in the Universidad Libre- Bogotá Campus

Introduction: The article is the product of the investigation of the determination of the concentration of particulate matter PM2.5, estimating the influence of temperature and precipitation, developed at the Universidad Libre, Bogotá Headquarters between the years 2018-2019. Problem: Concentrations of particulate matter have increased in recent years in Bogotá, generating a serious environmental problem, concentrations that have been caused by the automotive fleet and industries. Objective: To determine the relationship of the particulate material with the meteorological variables Precipitation and Temperature, and the influence of the contributing sources of PM2.5 in the studied area. Methodology: For the determination of [PM2.5] a WilBur model low volume sampler was used, the meteorological data were obtained from the Bogotá Air Quality Monitoring Network of the Secretary of the Environment. Softwares such as ArcGis, WRPLOT and MiniTab were used for the graphical representation of the results. Results: The average [PM2.5] for dry and wet season was 9.03 and 19.22μg / m3. . For the meteorological variables, a precipitation of 40.4 and 373.6 mm, a temperature of 14.3 and 15.32 ° C, respectively, was obtained. Conclusion: There is a low relationship between meteorological variables and [PM2.5] in both monitoring seasons, however, a behavior of concentrations similar to that found in the literature is evidenced. Originality: PM2.5 sampling in both seasons within the Free University, cataloged as a background area. Limitations: The monitoring time for the year 2018 was in the months of July and August and the year 2019 from March to May.