‘Unusual spell’ of cold wave grips north India; scientists explain why
NEW DELHI: An unusual and powerful spell of "Western Disturbances", originating in the Mediterranean..
NEW DELHI: An unusual and powerful spell of "Western Disturbances", originating in the Mediterranean sea, has made the Hindi heartland shiver for the past fortnight. Unfortunately, the spell, striking once in four to five decades, will continue to freeze people on New Year's Eve too.
"It is a long spell, very unique in nature, and would affect entire northwest India," says Dr Rajendra Jenamani, senior scientist at the India Meteorological Department (IMD).
The thick cover of smog on the Indo-Gangetic plains and the uneven warming of the Indian Ocean has a role to play in this robust spell of Western Disturbances, the extratropical storms originating in the Mediterranean region causing sudden winter rain to the northwestern parts of the Indian subcontinent, which have brought the day temperatures in some Indian cities below 12 degrees celsius.
READ ALSO | Cold wave in north India, Fatehpur in Rajasthan records minus 3 deg Celsius
Top scientists fear that due to climate change, such harsh and unexpected weather conditions will continue to trouble people.
"The climate change affecting the intensity and frequency of Western Disturbances can bring mercury down in northern region in years to come, while central and southern Indian regions could be more warmer," says Dr Bhupinder B. Singh, senior scientist at the government's premier Centre for Climate Change Research (CCCR) at Pune.
READ ALSO | Cold wave continues in Delhi, mercury drops to 5.8 degree Celsius
In coming years, predicts Dr Singh, the Himalayan Region and the Indo-Gangetic plains covering almost the north India could be more vulnerable to extreme weather.
Asked about the reason for such severe weather conditions, the CCCR scientist said that change in land use and land cover which are shrinking the forest belt are among the few culprits for climate change. Besides, greenhouse gases, particularly aerosol-like fine dust particles in the air, are making conditions worse.
"Just note, if there would be more pollution, there would be more smog. Similarly, the more intense are the western disturbances, the more extreme weather we have to face," Dr Singh said.
Scientists at the IMD also agree that smog over Indo-Gangetic plains is impacting weather. Their research indicates that in the past few years, a pattern is emerging of an unexpected change in temperatures. This pattern would continue and could impact weather more severely in the near future.
"Normally a spell of severe cold weather stretches to 5 or 6 days. But this year, since December 13, the temperature continues to dip … It is unique. However, now it sRead More – Source
