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Delhi: Air quality of Delhi still very poor category, mercury likely to dip to 9 degrees Celsius

New Delhi: Delhi’s air quality was in the very poor category on Monday morning. The minimum temperature possible in Delhi today is 9 degree Celsius. At the same time, the maximum temperature is expected to be 27 degree Celsius. According to the Central Pollution Control Board, the hourly air quality index (AQI) was 319 at 7am. On Sunday, the average 24-hour AQI was 314.

By Priyanka Verma 
Updated Date

New Delhi: Delhi’s air quality was in the very poor category on Monday morning. The minimum temperature possible in Delhi today is 9 degree Celsius. At the same time, the maximum temperature is expected to be 27 degree Celsius. According to the Central Pollution Control Board, the hourly air quality index (AQI) was 319 at 7am. On Sunday, the average 24-hour AQI was 314.

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According to the forecast of the agency Skymet, icy cold winds from the western Himalayas will soon start moving towards the northwestern and central parts of India, due to which the temperature will drop rapidly. Due to the cold wave, the minimum temperature of Delhi, Haryana, Punjab and UP will be seen falling. An AQI between zero and 50 is considered ‘good’, 51 and 100 ‘satisfactory’, 101 and 200 ‘moderate’, 201 and 300 ‘poor’, 301 and 400 ‘very poor’, and 401 and 500 ‘severe’.

On Monday, the government’s monitoring agency System of Air Quality and Weather Forecasting and Research said pollutants emitted from stubble burning contributed 10% to PM2.5 and fine particles (size < 2.5 micrometer) ~ 57% to PM10. “Local surface winds being low (6 km/h) cause weak dispersion while [a] drop in minimum temperature...also helps accumulation of pollutants. Moderate ‘Mixing layer height’ during daytime (~ 1.0 – 1.5 km) enhances vertical mixing.” On Monday, AQI was likely to remain within the lower end of very poor. “For the next 3 days, upper-level winds are from [the] northwest direction that is likely to increase transport of pollutants from stubble burning region if fire counts increase. AQI is likely to be within ‘Poor’ or ‘lower end of very poor’ for the next 3 days due to [a] net effect of inflow of pollutants and local dispersion and ventilation,” the agency said. If we talk about the weather of South India, there are chances of rain in some areas here. Due to the disturbance generated in the Bay of Bengal, it may rain in parts of Tamil Nadu, Puducherry and Andhra Pradesh. Rain is forecast in some parts of Telangana and Karnataka. The Meteorological Department has issued an alert for this. On Sunday, the minimum temperature was 9.6 degrees Celsius, three notches below normal, and the maximum of 26.8 degrees Celsius, a degree below normal.

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