Statistical Characteristics of Mean Monthly and Annual Concentrations of Particulate Matter PM2.5 and PM10 in Tbilisi in 2017-2023

Abstract

Results of the statistical analysis of the average monthly and annual concentrations of particulate matter PM2.5 and PM10 at three locations in Tbilisi (Kazbegi av., Tsereteli av. and Varketili) in 2017-2023 are presented. An analysis of the correlations between the indicated characteristics of air pollution has been carried out. The variability of the average annual values of PM2.5 and PM10 in the study period of observations was studied. In particular, it was found that after a significant decrease in the average annual concentration of aerosols in 2020-2021 due to restrictions on vehicle movement related to the COVID-19 pandemic, an increase in aerosol pollution of the atmosphere has been observed in recent years. Thus, in 2023, the monitoring station on Tsereteli Avenue fixed a record increase in PM10 content in the air. In general, over the entire observation period, the average annual concentration of PM2.5 and PM10 was above the permissible limit.