Delhi's air quality improves marginally
The Hindu
The overall air quality index stood at 323 at 8 a.m. However, calmer winds during the day may allow pollutants to build up.
Delhi's air quality improved marginally on November 9 (morning) owing to favourable wind speed overnight but was recorded in the very poor category.
The overall air quality index (AQI) stood at 323 at 8 a.m. However, calmer winds during the day may allow pollutants to build up. A Met official said winds gusting up to 30kmph barrelled through parts of Delhi for a brief period on Tuesday night (November 8). It helped improve the situation.
Delhi recorded a minimum temperature of 16.9 degrees Celsius, three notches above normal. The maximum temperature is likely to settle around 30 degrees Celsius. Partly cloudy skies and very light rain are predicted during the day under the influence of a western disturbance affecting the hilly region in the north.
The improvement in air quality was evident from better visibility levels with 1,400 metres at the Palam airport and 1,500 at the Safdarjung airport. A smoky haze had lowered the visibility levels to 800 metres at these places on Tuesday.
Favourable wind speed — 15-20 kmph — is predicted to bring a considerable improvement in the air quality from November 11. The capital's 24-hour average air quality index stood at 372 on Tuesday. It was 354 on Monday, 339 on Sunday and 381 on Saturday.
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.
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