Main Article Content
Currently, Bangkok is facing with air pollution as continuously problem. In particular, the fine particulate matter (PM2.5, diameter> 2.5µm) and meteorological changes, have effect problem of PM2.5 and more severe situation. It causes affects to public health and environment. Therefore, the objective of this research is to study the meteorological factors influencing the changing of PM2.5 concentration in Bangkok area. In the methodology, the relationship between meteorological factors was analyzed such as relative humidity, wind direction, wind speed, temperature, and air pressure by using statistically significant relationship with the PM2.5 concentration. The correlation coefficients were-0.270, -0.127, -0.013, –0.130 and 0.084, respectively. Especially relative humidity can be referred to the variation in PM2.5 (approximately 64.20%) at high PM2.5 concentrations in winter and in the rush hour of every year. In addition, the occurrence of the Temperature Inversion (TI) affects to the concentration of PM2.5 during the 4 years of study period (2016 and 2018-2020). The trend of TI is the increasing of occurrences changes and longer period of TI. The highest to lowest of TI is on 2020, 2016, 2019, and 2018, respectively.
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