Wednesday , October 28 2020

Air pollution dissipates when high-speed winds bring light relief from pollution in Delhi-NCR. But just for now



New Delhi: Strong winds on Saturday have reduced air pollution over Delhi-NCR over the past four days, resulting in a decline in pollution levels. The national capital's air quality index was 357 at 4 pm on Saturday, about 100 points lower than Friday's AQI.

The suburbs of Ghaziabad (347), Greater Noida (309), Gurgaon (360), Faridabad (358) and Noida (338) also recorded a drop in pollution levels.

"Strong surface winds, with gusts up to 25 km per hour, blew in the region, reducing pollution and bringing slight relief. Wind conditions are also expected on Sunday and air quality will improve further over the next two days. "Kuldeep Srivastava, a senior scientist in the Indian Meteorological Department, said.

Delhi and Ghaziabad, Noida and Greater Noida schools also reopened on Saturday after remaining closed for two days due to a damaging increase in air pollution.

The Air Quality and Forecasting and Weather Research System (SAFAR), the government's air quality monitor, said strong boundary and surface winds were expelling accumulated pollutants. A drizzle last night would delay the recovery, but it did not, the statement said.

"High winds on Delhi's surface are expected to continue for the next two days. The effective count of stubble fire is low. Even if high, the wind direction at the transport level is not favorable (north) and the speed is very high (42 km / h)) that the plume will overtake Delhi and complete its lifespan before touching the lower end of the Indo-Gangetic Plains (Mathura-Agra), "said a SAFAR official.

The share of stubble burning in Delhi's pollution on Sunday is unlikely to exceed 2%, the official said. AQI is likely to fall into the bad category on Monday. However, pollution is likely to increase on November 20, as another western disturbance will result in a drop in wind speed.

An AQI between 201 and 300 is considered 'bad', 301-400 'very bad' and 401-500 & # 39; grave & # 39;

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