The months of October and November see a rise in Delhi pollution levels. Increased levels of pollution have now become a constant part of capital territory during this time of the year. During these two months, the minimum temperature starts dropping thereby leading to formation of haze and mist in morning hours.
According to Skymet Weather, along with this, the frequency and intensity of Western Disturbance starts to increase during this period which leads to continuous change in wind direction. These winds at times, become light in nature with no definite direction. In absence of strong winds and definite direction, haze persists for longer duration. And, the water vapor of haze and mist acts as a condensation nucleus for pollutants to settle on them. It then forms a layer of smoke and haze or smog. The layer of smog remains suspended near the earth surface for longer duration leading to an increased level of pollution.
In the afternoon hours as the temperature starts rising, haze and mist start clearing up and this leads to marginal improvement in air pollution.
Stubble burning is another factor which leads to an increased level of pollution. This burning of stubble happens in neighboring states of Delhi-NCR such as Punjab, Haryana and Uttar Pradesh. The smoke and pollutants from stubble burning along with local pollution such as smoke from vehicle congestion, traffic, factories, loose dust, dust from construction sites add on to existing pollution.
Presently, the air quality of Delhi-NCR is in 'poor' category and soon, we expect it to become severe. We do not expect any relief from the rising pollution in the coming days. As per weathermen, good rains and strong north westerlies will help in getting rid from this severe pollution. The strong winds and good rain will carry away or spread the pollution in wider area.
However, we do not expect formation of any major weather system anytime soon that could help in reducing the levels of pollution. Till then, Delhiites will have to continue fighting this battle and are advised to take precautions.
Image Credit: ARS Technica
Please Note: Any information picked from here must be attributed to skymetweather.com
