India should prepare itself for the harshest winter these year according to report. The Northern part of India most likely to get hit by La Nina weather phenomenon. It will result to extreme cold weather from the month of December to February.
The fall winter is a signal that the weather will get even more harsher in the upcoming days .And that people should prepare themselves beforehand. Similar La Nina conditions last year, albeit a bit stronger, spoiled the snowy season for the hilly states and corrupted the winter rains for plains of north India.
The states like Punjab and Uttar Pradesh experienced a deficiency in rainfall during the winters last year. Whereas the hilly region experience a failed snowfall season and a shortfall of more than 50 percent. Whereas New Delhi the capital faced the coldest water and cold waves in January 2021. These was the coldest since 2008. This figure was just one day in January 2019 and 2020.
The warm phase of the east and the central Pacific Ocean, periodically seen once in two-seven years, is termed as El Nino and the reverse process of cooling in the same area, is labelled as La Nina. This phenomenon impacts the flow of trade winds, prevalent on either side of the equator.
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At the time of El Nino, warm water on the western boundary of the Pacific Ocean begins to push eastward. This perturbation leads to the degradation of the temperature gradient. Which in turn slows the trade winds. Conversely, a strong easterly current during La Nina pushes the water towards the west and thereby cools the ocean surface.
Scientists have coined the term ‘ENSO’ which is a combination of the word El Nino and Southern Oscillation Index. ONI is used for measuring, monitoring ,assessing and predicting ENSO. It is based on sea surface temperature departure from average in the Nino 3.4 region of central Pacific Ocean.
“We are expecting temperatures to be colder than normal this winter across northeastern Asia,” said Renny Vandewege, a vice president of weather operations at data provider DTN to NDTV. “Weather forecast data is a critical component of predicting how much energy load will be required.”
The extreme harsh change in weather change can be witness in all the parts of India. In the form of late rainfall and delayed monsoon are both related to La Nina.
According to Todd Crawford, director of meteorology at Atmospheric, G2, apart from La Nina events, there are other factors that can impact the region’s winter weather.
It is due to climate change, the Arctic’s Kara Sea is witnessing a lack of sea ice, which may be contributing to high pressure ridging in that area. This leads to downstream colder conditions across northeast Asia, “like what happened last winter,” he said.
