After a brief spell of respite, Delhi air quality to again touch ‘severe’ category by Tuesday due to a range of factors including winter onset. On Sunday, Air Quality Index (AQI) was recorded a dip from Saturday’s ‘poor’ to ”very poor” category due to an increase in incidents of stubble burning, change in the wind direction, and relaxation of odd-even scheme in the national capital.
System for Air Quality and Weather Forecasting and Research (SAFAR), the government’s air quality monitoring and forecasting service has predicted that air quality may witness deterioration in coming days.
With the winter setting in, a dip in the minimum temperature makes the air cold and heavy leading to accumulation of pollutants close to the ground, the System for Air Quality and Weather Forecasting and Research (SAFAR) said.
It said the boundary-layer winds are northwesterly which are favourable for stubble plume intrusion.
“The only positive factor is the forecast of high local wind speed in Delhi during day hours for efficient ventilation of pollutants, but its accumulation is expected during stable and calm night hours,” it said.
The Central Pollution Control Board (CPCB) registered Delhi’s air quality index (AQI) at 321 at 4 pm on Sunday, up from Saturday’s 283. Most of the 37 air quality monitoring stations in Delhi recorded air quality in the ”very poor” category.
Neighbouring Greater Noida with an AQI of 347, Ghaziabad (374) and Noida (353) also recorded an increase in pollution levels.
Odd-even relaxation may aggravate situation
The Delhi Government has announced that there will be no odd-even restrictions on vehicles on November 11-12 in Delhi to ensure hassle-free commute on the occasion of the 550th birth anniversary of Guru Nanak Dev. Originally; the government had announced the odd-even scheme between November 4 and November 15 to fight air pollution.