New Delhi, Dec 26: Delhi continued to shiver as the temperature dipped to 9 degrees and cold wave gripped the national capital on Tuesday morning. Delhiites woke up to a dense fog engulfing the city which dropped the visibility by several metres. The cold wave and dense fog continued to disrupt lives in the national capital as 30 trains got delayed while 6 were rescheduled and 10 cancelled due to low visibility and other operational reasons.

As far as Delhi’s air quality is concerned, it, yet again, dipped to ‘very poor’ in the city as the volume of pollutants spiked. PM 2.5 of Air Quality Index at Delhi’s Lodhi Road was calculated at 316, and PM 10 at 285. The level of Carbon Monoxide was recorded at 500 in ‘Severe’ category, ANI reported. On Sunday, at least 17 trains were cancelled, 19 were delayed and six were rescheduled after dense fog engulfed the capital city again. Over 26 trains were cancelled on Monday, December 25. (Also Read: Delhi Pollution: Air Quality Back at ‘Severe’ Level as Smog Makes a Comeback)

On Monday, the air quality of Delhi deteriorated further as nine out of 17 stations of the Central Pollution Control Board (CPCB) in the city recorded ‘severe’ air quality in the national capital. The average Air Quality Index was 372, classified as ‘very poor’ by the CPCB. A top CPCB official on Monday said that it may consider using advanced LiDAR (Light Detection and Ranging) to monitor Delhi-NCR air quality. Explained: Delhi Govt Tests Anti-Smog Gun to Counter Pollution: Here’s How it Works

“The CPCB has taken up the responsibility to strengthen the ground-level monitoring first on a priority basis. It may consider (an) application of the LiDAR-like monitoring in later stages to have better strategic planning in air pollution control in Delhi-NCR for which fund would never be a constraint,” said CPCB’s air lab chief Dipankar Saha, adding that the agency is focussing on strengthening its surface-level monitoring network.

Monitoring system LiDAR is used for mapping in micro-topography, forestry, agriculture, meteorology and environmental pollution.