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| Science decodes factors behind North India's cold wave | | | agencies
NEW DELHI, Feb 1: The ongoing cold wave conditions observed over North India result from the intrusion of cold and dry air from the Siberian high, according to a study by researchers at IISER Mohali. The Siberian High is a massive collection of cold dry air that accumulates in the northeastern part of Eurasia from November until February. The study, published in the journal Weather and Climate Extremes, sheds light on the underlying causes and alarming trends behind the frigid conditions. The research, led by Professor Raju Attada from the Indian Institute of Science Education and Research (IISER Mohali), unveils crucial insights into the factors driving extreme winter temperatures. A cold wave event is identified from the normalised minimum temperature anomaly when the standard deviation is less than minus 1 for four or more consecutive days. A severe cold wave event is identified from the normalised minimum temperature anomaly when the standard deviation is less than minus 2 for four or more consecutive days. Delhi and other northern parts experienced severe cold on Wednesday as many areas of the region received rainfall and snow. In Delhi, the maximum temperature was 18.6 degrees Celsius, four notches below the season's average, and the minimum stood at 7.3 degrees Celsius, a notch below the normal, according to the India Meteorological Department (IMD).
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