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Latest NewsClimate Change, Pollution, Construction: Multiple Whammy To Fuel More Sikkim-Like Disasters, Warn...

Climate Change, Pollution, Construction: Multiple Whammy To Fuel More Sikkim-Like Disasters, Warn Scientists


New Delhi, Oct 22: Rising temperatures, glacial melt, heavy rainfall… The multiplier effect of climate change combined with untrammelled construction and pollution to wreak havoc in Sikkim, say scientists, warning that more such disasters in the Himalayas could be in the offing with the rise in the number of glacial lakes.
As Sikkim picks up the pieces following flash floods that saw many thousands being displaced, major infrastructure projects destroyed and scores of people killed earlier this month, experts said other Himalayan states, including Pradesh, Arunachal Pradesh and and Kashmir, are susceptible to similar glacial lake outburst floods (GLOF).
A GLOF is a catastrophic deluge triggered by the failure of a moraine dam containing a glacial lake.
“Vulnerable areas include Himachal Pradesh, Jammu and Kashmir, Uttarakhand, and Arunachal Pradesh, where numerous glacial lakes are rapidly expanding due to climate change,” environmental expert Anjal Prakash told sources.

2020 study based on satellite data.
While glacier lakes can emerge in any area left behind after a glacier retreats, the experts said GLOF hotspots are primarily concentrated in the eastern and central Himalayan regions.
“All the Himalayan countries are prone to have GLOF events in the future due to enhanced glacier wastage, increase in number and size of pro-glacier lakes, increase in erratic precipitations and heatwaves,” Azam explained.
Climate scientist Roxy Mathew Koll warned that the likelihood of cloudbursts, heavy rainfall, landslides, and glacial outbursts has markedly increased, especially over mountainous regions, in a swiftly warming .
“If we have data over these regions, we can identify the hotspots and also improve our weather forecasts,” Koll, from Pune's Indian Institute of Tropical Meteorology (IITM) told sources.

The tragedies, whether in the sinking town of Joshimath or in Sikkim, were forefold decades ago, said Manshi Asher from the Environment Research and Action Collective, Himdhara.
“Himalayas are known as multi-hazard zones and are interlinked hazards – floods, landslides, seismic activity, etc. There will be triggers and cycles of disasters exacerbated because of climatic and biophysical factors. Evidence regarding the damage that can be caused by these projects has been presented and sidelined over and over again,” Asher said.
“A question does arise then — why was such heavy investment allowed in fragile landscapes jeopardising ecology and people?”
An estimated three million Indians currently live in areas where the threat of a GLOF is ever present.
Exacerbating the situation further, climate change continues to intensify due to the escalating emissions of black carbon resulting from fossil fuel combustion. The experts emphasised that when desert dust and black carbon settle on glaciers, they expedite the melting process by diminishing their albedo, or reflectivity, causing the glaciers to absorb more sunlight.
“Increasing tourism in the mountains is also affecting the local climate and glacier wastage. For instance, glaciers close to roads often have more black carbon and dust on their surfaces due to their close vicinity,” Azam said.
Prakash added that construction activities around mountains disrupt ecosystems, increasing the risk of landslides and lake destabilisation which intensify the impact of climate change, making GLOFs more frequent and severe.
To mitigate the potential devastation caused by these looming tragedies, scientists advocate a meticulous analysis of pro-glacial lakes using satellite data. They stress the importance of focusing particularly on potentially hazardous lakes, especially those located upstream of human settlements and crucial infrastructures.
“For potentially dangerous lakes, artificial water lowering through siphoning or mechanical pumping should be done. Besides, early warning systems should be installed to inform the villages, and towns in case of an upstream pro-glacial dam breach,” Azam said.
What is needed is a multi-pronged approach to address GLOFs in vulnerable regions like the Himalayas.
“Firstly, there's a need for advanced monitoring systems to track glacier and lake changes, along with early warning systems for timely alerts. Sustainable land-use policies and reforestation can reduce human impact on these areas. Infrastructure and settlements should be relocated away from GLOF-prone zones,” Prakash said.
“International cooperation on climate change mitigation is essential, as it addresses the root cause of glacier melt. Lastly, raising public awareness and fostering community resilience through and preparedness are crucial steps to minimise the potentially devastating consequences of GLOFs,” he added. (Agencies)

The Northlines is an independent source on the Web for news, facts and figures relating to Jammu, Kashmir and Ladakh and its neighbourhood.

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