Delhi wakes up to cold morning as temperature drops in city, expects ‘shallow’ fog


The people of Delhi woke up to a cold morning as there was a drop in temperature in the city on Sunday. The minimum temperature was recorded at 13° Celsius and the maximum is expected to settle around 26° Celsius, the weather department said.

Calm winds and low temperatures trap pollutants close to the ground, while favourable wind speed helps in their dispersion. (File Photo: PTI)

The people of Delhi woke up to a cold morning as there was a drop in temperature in the city on Sunday morning. The minimum temperature was recorded at 13° Celsius and the maximum is expected to settle around 26° Celsius, the weather department said.

The national capital will also experience “shallow” fog, according to the India Meteorological Department (IMD) on Sunday.

The IMD had said on Saturday that the national capital is likely to see “shallow” to “moderate” fog over the next two days.

Meanwhile, VK Soni, head of the IMD’s environment research centre said that the air quality is likely to improve in Delhi from “severe” to “poor” category by Monday, as the wind speed is expected to pick up.

Calm winds and low temperatures trap pollutants close to the ground, while favourable wind speed helps in their dispersion. Mixing depth is the vertical height at which pollutants are suspended in the air. It reduces on cold days with calm wind speed.

A ventilation index lower than 6,000 sqm/second, with the average wind speed less than 10 kmph, is unfavourable for the dispersal of pollutants.





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