28 Jan The changing Winters
The changing Winters- Today Current Affairs
The winter of 2021-2022 has been unusually cold and unusually long in India especially in northern India. Mainly the days have felt colder and more chillier than normal. From december 2021 only the maximum temperatures across the North, Northwest and Central India regions have continuously remained below normal, resulting in ‘cold day’ conditions. In technical terms, this means more than just a day that is cold. A cold day is a day in which the maximum temperature falls below 16 degrees Celsius and this phenomenon is commonly seen during the winter months in the northern plains of India.
Also usually light to moderate intensity rainfall is commonly seen during winters in neighboring regions of North India.However this January we have has seen widespread rain across the central, northwestern, northern, eastern, and northeastern regions of India. Around 24 states or Union Territories have recorded rainfall varying from excess to large excess in January .On the other hand, december and january are known for the formation of dense fog across North India. But less fog is recorded this month. In this January , NCR region remained affected by fog for 252 hours against a normal of 292 hours. According to IMD officials , the ongoing winter has recorded the lowest fog hours in Delhi since 1991-92 . The Hindu Analysis.
The Causes are a combination of Western Disturbances,La Niña, Cold Winds from Far North and Low-lying Clouds and Moisture. Western Disturbance originating in the Mediterranean, is an area of low pressure that brings with it sudden showers, snow and fog in northwestern part of India.This disturbance travels from the western to the eastern direction, that’s why the name..Until 25th of this month , seven western disturbances had passed over India , all of them strong enough to cause widespread rain,and turbulent weather across large geographical areas . This caused caused hailstorms in northern Maharashtra, and heavy rainfall in Tamil Nadu.The western disturbances are usually associated with La Niña. La Niña represent periods of below-average sea surface temperatures across the east central Equatorial Pacific regions of the world.La Niña is indicated by sea-surface temperature decreased by more than 0.9℉ for at least five successive three-month seasons. Presently,moderate intensity La Niña conditions ( cooler than normal sea surface temperatures in the equatorial Pacific Ocean) are prevailing.In India, the La Nina is normally responsible for cooler than normal winters and more than normal rainfall.
The cold winds from the far north of the country penetrate to lower latitudes after a western disturbance crosses India. This can reach up to even Telangana and Maharashtra to cold wave conditions.Also, along the Indo-Gangetic plains, the presence of low-lying clouds and the availability of moisture made it favorable for cold day conditions and is responsible for the additional chill factor experienced during the day time. The Hindu Analysis.
Any deviation from normal weather conditions has a huge effect on the life of the flora and fauna of the region. The colder winter and rains at unusual times than normal effects the life of the people as they have to cope with these adverse conditions. This all is linked to the global climate changes predominantly the global warming and its effects . To cope with it in a sustainable manner, we need a comprehensive strategy at a global level .
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