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AQI dips to ‘very poor’ in Delhi, minimum temperature touches season’s low of 9.2 degrees Celsius – ET HealthWorld

AQI dips to ‘very poor’ in Delhi, minimum temperature touches season’s low of 9.2 degrees CelsiusNEW DELHI: The air high quality deteriorated on Wednesday and reached the center of “very poor” class. The general AQI was 361 in opposition to 290 in the “poor” class on Tuesday. Meanwhile, town recorded the bottom night time temperature of the season at 9.2 degrees Celsius, two notches under regular, at Safdarjung. The temperature dipped to 8.7 degrees Celsius at Mungeshpur and eight.8 degrees Celsius at Ayanagar.

A layer of smog decreased visibility throughout morning hours. Local sources of air pollution together with meteorological elements, together with calm or mild wind, low temperature and low mixing layer top, affected the air high quality.

Experts stated the layer of the environment, which comes nearer to the floor when temperatures drop, trapped the pollution. With low temperatures persisting in the area for the previous few days, the blending layer top was low. While low temperature slows down the dispersal of pollution, calm or mild winds trigger pollution to accumulate. The share of stubble burning to Delhi’s PM2.5 was solely 2% on Wednesday.

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RK Jenamani, senior scientist at India Meteorological Department (IMD), stated, “The wind blew at a speed of 5-10 kmph in the afternoon, but it became calm in the evening. The wind speed is predicted to remain low for the next two days. The visibility was 800-1,200 metres during morning hours, but it improved to 1,500-3,000 meters during daytime.”

Dipankar Saha, former head of Central Pollution Control Board’s air laboratory, stated, “Mixing layer height is 700 metres, not enough for dispersion.”
On Wednesday, TOI had reported that although the general AQI had improved to 290 on Tuesday due to reasonable winds, it deteriorated at night time and touched the “very poor” class as wind pace dropped to nil.

System of Air Quality and Weather Forecasting And Research stated, “Local surface winds are relatively low for the next three days. Air quality is likely to be in the higher end of the very poor category for the next two days. On November 27, local surface winds are likely to increase resulting in improvement in air quality, but expected to stay within the very poor category. The effective fire count is 432. With the onset of winter, local weather is likely to dominate in determining air quality.”

According to air high quality early warning system for Delhi, the air high quality was probably to stay in the “very poor” class for the subsequent 5 days and PM2.5 can be the outstanding pollutant. Gradual enchancment in air high quality was probably from November 27. AQI dips to ‘very poor’ in Delhi, minimum temperature touches season’s low of 9.2 degrees Celsius

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