The sky of the capital becomes dusty

According to the Wave News Agency, the sky Tehran Province During the next four days, clear to partly cloudy, sometimes with wind, and in the evening and night in the southern and western parts of the province, sometimes strong winds and the possibility Dust rise It is expected.

According to the Tehran Meteorological Department, today (September 4) there will be an increase in clouds and strong winds in the highlands, and in the eastern highlands there is a possibility of scattered rain and a relative decrease in temperature is forecast.

Forecasts made by the Tehran Air Quality Control Company also indicate that this morning (September 4) in some busy areas air quality will be in the unhealthy range for sensitive groups due to increased morning traffic, in addition to Relatively strong winds are expected in the past few hours and dust is expected from areas prone to dusty skies.

The relatively calm and stable atmosphere during the day will limit the favorable conditions for the dispersion of pollutants. Also, with the presence of sufficient factors to produce ozone pollutants, increasing the concentration of this pollutant in some areas will reduce air quality in the afternoon.

Continuation of atmospheric stability and lack of effective winds until late today (September 4) will increase the concentration of particulate matter and the accumulation of pollutants, and the establishment of an unhealthy situation for sensitive groups in most busy areas will not be unexpected.

With the decrease of wind speed until Sunday morning (September 5) along with the increase of morning traffic, the air quality in most of the busy areas will be in the unhealthy range for the sensitive groups. A gradual increase in wind speed during the day will facilitate the dispersion of pollutants, although with increasing temperatures in the afternoon and increasing concentrations of ozone pollutants in some areas will reduce air quality.

With the continuation of effective winds until the last hours of Sunday (September 5), a decrease in the concentration of suspended particles is expected, resulting in an acceptable situation in most areas, although there is a possibility of dust emission from susceptible areas.

The pollutant of the capital’s air index during the last 24 hours was “suspended particles less than 2.5 microns” with an average of 89, and the air quality in the capital was in an acceptable condition. The index pollutant is currently “particulate matter less than 10 microns” with an average of 106 and air quality in the unhealthy range for sensitive groups.