National Committee on Ecology and Climate Change of the Republic of Uzbekistan

According to forecasts, air quality is initially expected to reach the “Unhealthy for Sensitive Groups” level on the international Air Quality Index (AQI) during the evening. After 8:00 p.m., PM concentrations are expected to increase. Air quality may reach the “Unhealthy” level overnight and in the early morning, corresponding to the “Orange” level on the national Air Quality Index.

Falling temperatures at night, light winds and a strong temperature inversion restrict air circulation in the lower atmosphere. Under these conditions, the dispersion of emissions generated within the city and in neighbouring regions slows down, potentially leading to an accumulation of PM particles close to the ground.

During the day, as temperatures rise and vertical air circulation improves, the inversion is expected to weaken, leading to an improvement in air quality.