The key facts

  • At night in Tashkent, the AQI index is forecast at the 'unsatisfactory' level, mostly 'yellow' on the national scale
  • The cause is cooling and a temperature inversion that limits air exchange
  • During the day, with warming, air quality is expected to improve

Night forecast and its causes

The Ecological Committee forecasts, that in the evening and night hours the air quality in Tashkent will be at the 'unsatisfactory' level according to the international AQI index, and according to the national scale, mostly in the 'yellow' zone. According to the committee's forecast, the cause may be a drop in night temperature and a temperature inversion: it limits air exchange in the lower layers of the atmosphere, while weak wind slows the dispersion of pollutants coming both from the city itself and from adjacent areas.

What is expected during the day

During the day, when the air temperature rises, the inversion may weaken due to improved vertical air exchange — then, according to the forecast, air quality will gradually improve. For readers this means that the deterioration is a nighttime phenomenon linked to weather conditions rather than a one-off emission: the committee attributes the dynamics specifically to the inversion and the wind.