Rain has little impact as air quality turns severe
Hindustan Times|December 03, 2021
Delhi's air quality deteriorated to the "severe" category on Thursday, with the slight drizzle recorded in the city having little impact on clearing up the pollution.
Jasjeev Gandhiok
Rain has little impact as air quality turns severe

NEW DELHI: While rains generally have a positive impact on air quality, experts said that persisting cloud cover and slight drizzle for a brief period may actually have a detrimental impact on air quality as the rain adds to the existing moisture in the air, trapping pollutants locally. The cloud cover also does not allow pollution to escape.

Weather experts suspect this is what happened in the Capital on Thursday, as a combination of calm winds, low temperature and very light rain added to Delhi's moisture content, taking the AQI to a reading of 429 as per Central Pollution Control Board's daily 4pm bulletin - up nearly 60 points from Wednesday's reading of 370 in the "very poor” range.

While only Imm of rainfall was recorded at Safdarjung, Delhi's base observatory, cloud cover through the day meant Delhi recorded a maximum temperature of just 19.8 degrees Celsius (°C) - five notches below normal and the lowest maximum so far this winter season. The minimum temperature was 13.4°C.

This story is from the December 03, 2021 edition of Hindustan Times.

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This story is from the December 03, 2021 edition of Hindustan Times.

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