Computer Simulations of Air Quality and Bio-Climatic Indices for the City of Sofia

Air pollution is responsible for many adverse effects on human beings. Thermal discomfort, the other hand, able to overload body and eventually provoke health implications due heat imbalance. Methods: The aim of presented work study behavior two bio-climatic indices statistical characteristics air quality index Sofia city—the capital Bulgaria period 2008–2014. based WRF-CMAQ model system simulations with a spatial resolution 1 km. estimated by index, taking into account influence different pollutants thermal conditions indices, respectively, hot cold weather. It was found that recurrence both categories have heterogeneous space distribution well manifested diurnal seasonal variability. For all situations, only O3 PM10 are dominant pollutants—these which determine AQI category. AQI1, AQI2, AQI3, fall in “Low” band, highest during seasons, up more than 70% some places situations. AQI10 (very high) rather small—no 5% concentrated small areas, mostly city center. Heat category “Danger” never appears, “Extreme caution” appears spring summer less Wind-chill category, “Very High Risk” “High frequency about 1–2%. above leads conclusion from point view bioclimatic risks not as high.