December 1, 2020 3:06:21 am
The common minimum temperature this November in Delhi reached 10.2 levels Celsius — a mark beforehand recorded 71 years in the past in November 1949 — information from the India Meteorological Department (IMD) reveals.
Cold winds blowing from northern areas of the nation and clear skies had been credited as the 2 important causes for the drop in mercury. The final time common minimum or evening time temperature dropped under 10.2 levels Celsius in Delhi in November was in 1938, when it was 9.6 levels Celsius, IMD information reveals.
However, IMD scientists additionally mentioned the La Niña climate phenomenon, which is at present lively, has been influencing temperatures.
La Niña refers back to the large-scale cooling of the ocean floor temperatures in the central and japanese equatorial Pacific Ocean, coupled with modifications in the tropical atmospheric circulation, particularly winds, strain and rainfall, as per the World Meteorological Organisation (WMO), a United Nations company.
Kuldeep Srivastava, head of IMD’s regional climate forecasting centre in Delhi, mentioned, “La Niña has an impact on temperatures across the globe. When this phenomenon is active, there is a possibility that winter temperatures would remain lower than usual.”
Srivastava mentioned vital quantity of snowfall has been recorded in excessive altitude areas of Himachal Pradesh, Jammu & Kashmir and Uttarakhand since mid-November, which was additionally related with La Niña.
“Cold northwesterly winds blowing over Delhi from these areas caused minimum temperatures to drop to below normal levels on most days this month. Additionally, the sky over the city remained largely cloudless, which led to higher radiation from the earth at night time and more cooling,” he mentioned.
Delhi witnessed 0.6 mm of rainfall on November 16, which, together with cloud cover, helped minimum temperature to rise as much as 16 levels Celsius.
However, after November 16, with clearing of cloud cover, minimum temperature started dropping quickly, reaching as much as 6.3 levels Celsius on November 23 — lowest for the month since November 29, 2003, when it was 6.1 levels.
Four chilly wave days had been additionally recorded this November. Among earlier years since 2011, solely November 2014 and 2013 have recorded chilly wave days — one every.
As of Monday, minimum temperature on the IMD’s Safdarjung observatory, which is consultant of Delhi, continued to drop and was recorded at 6.9 levels Celsius.
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