Winter along with pollution will make it difficult to breathe in North India

New Delhi: November and December may be the most difficult months for the plains of northern India. On the one hand La Niનાa will cause a tremendous increase in cold and on the other hand straw smoke will work to dissolve toxins in the atmosphere. This will make it extremely difficult to breathe with a significant increase in cold. Although the prolonged monsoon in October kept the situation under control, the situation now appears to be changing. According to environmental scientists, the level of pollution in North India will be high due to low temperature and other weather related factors such as slow wind speed and its direction.

Rising pollution levels in most northern Indian cities since early winter are worrisome

Due to this, the climate in the Gangetic plains states like Delhi, Punjab, Haryana, Rajasthan, Uttar Pradesh, Bihar, Jharkhand and Bengal is falling into the worst category. Firecrackers and burning of straw have further aggravated the situation.

In fact, colder climates are considered to be more conducive to pollution. Due to this, cold weather prevails all over North India during the season. As the temperature decreases, fog is formed. Temperature reverses when cold air is trapped below the hot air level. Pollution in the atmosphere remains the same as cold air cannot rise above hot air. Fog in cold climates is thus the result of a change in temperature. Generally, the air available at higher levels in the atmosphere is cooler than the surface air of the earth. So hot air rises from the surface which spreads the pollutants from the surface into the atmosphere.

For the second year in a row, North India is ready for the cold snap with La Nina. Scientists have forecast extremely cold in the plains this year. In January-February, temperatures in some parts of northern India can reach up to three degrees.

How La Nina is created

The state of La Nina is created by low air pressure in the equatorial Pacific Ocean region. There are various reasons for its origin, but the most common reason is that it occurs when the wind is blowing briskly from the east. This greatly lowers the sea surface temperature. It has a direct effect on global temperatures and temperatures are much colder than average.

GP Sharma, head of Skyweather, Meteorology and Climate Change, said that extreme cold is expected from December to February 2022.

The level of pollution in the states of North India is constantly increasing. AQI levels were recorded at critical levels in most cities on Wednesday morning. In most parts of Delhi, the AQI level has been recorded at serious to extremely bad levels in the morning.