Delhi’s air quality to deteriorate: IMD

at 3:45 pm
Delhi air pollution
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New Delhi: The air quality of Delhi is likely to deteriorate over the next two days because of strong dust-raising winds, the India Meteorological Department said today.

“The air quality is likely to deteriorate and crossover from Moderate to Poor category on 08.06.2021 (8th June),” the IMD said.

The strong surface winds are favorable for raising dust locally and transport of dust from nearby region, thereby making PM10 predominant pollutant, it said.

The air quality is likely to remain in moderate to poor category for subsequent 5 days.

According to the IMD, “The predominant surface wind is likely to be coming from Southwest directions of Delhi with wind speed 10-16 kmph and partly cloudy sky with possibility of very light rain/drizzle today.”

The predominant surface wind is likely to be coming from Northwest/West directions of Delhi with wind speed 16-28 kmph and partly cloudy sky with possibility of very light rain/drizzle on June 7 i.e. tomorrow.

The air quality over Delhi-NCT is likely to remain in Moderate category today and tomorrow, it said. 

The predominant surface wind is likely to be coming from West directions of Delhi with wind speed upto 28 kmph, mainly clear sky and strong surface winds (speed 25-35 kmph) during the day on June 8, it said.

Predicted maximum mixing depth is likely to be approx 3500 m on 6th June and 4100 m on 7th June and 4000 m on 8th June over Delhi, the IMD said.

Maximum Ventilation index is likely to be approx 23000 m2/s on 6th June and 33000 m2/s on 7th June 46000 m2/s on 8th June.

The ventilation index lower than 6000 m2/s with average wind speed less than 10 kmph is unfavorable for dispersion of pollutants.