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Delhi Air changes to ‘poor’ with changing wind speed

Air pollution in Delhi fell into the “poor” category of “Severe” on Wednesday as improved wind speed cleared pollutants on Tuesday. Delhi’s Air Quality Index (AQI) was recorded at 280 on Wednesday morning. Over the past 20 days, the AQI in the nation’s capital has fluctuated between the “very poor” and “severe” categories.

According to the Air Quality and Weather Forecast and Research System (SAFAR), a central forecasting agency, PM 2.5 was recorded in the “poor” category, while PM 10 was registered at 220 in the “moderate” category.

“The wind speed reached 8-12 km / h during the afternoon, but a calm wind was recorded during the evening hours,” RK Jenamani, senior scientist at IMD told The Times of India.

As the wind speed was relatively better on Monday, air quality started to improve from Monday afternoon and Delhi’s 24-hour average AQI fell to ‘poor’ on Tuesday at 4 p.m. time. However, the wind speed deteriorated again on Tuesday evening, leading to a build-up of pollutants, according to the TOI report citing a Met official.

Air quality is expected to remain in the “bad” or lower end of the “very bad” category on Wednesday and in the “very bad” category from Thursday, the early warning system said. air quality for Delhi.

Jenamani added that the wind speed is expected to be low over the next three or four days. Visibility at Safdarjung, the city’s base station, and Palam was in the range of 1,500 to 2,200 meters.

Winds at transport level are expected to slow down and also change direction from northwest to south / southeast on Wednesday and north or northwest on November 25, resulting in further improvement in air quality in the ‘poor’ category. ”SAFAR said.

The forecasting agency also predicted that local surface winds will be relatively weak for the next three days, which will reduce the dispersion of pollutants.

According to SAFAR, the air quality is expected to be in the “poor” category for the next three days, as surface wind flows are expected to increase from November 27.

Meanwhile, thatch burning is about to end for the season. Only 66 cases of stubble blight were reported in Punjab on Tuesday, TOI reported. The season tally reached 71,090 stubble burn cases, nearly 5,000 fewer than the 76,590 incidents reported in 2020.


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