Months earlier than devastating flash floods hit the the China-Nepal border, with a lethal wall of water and particles sweeping via the Himalayas and destroying complete villages, two stories had flagged issues indicated the livelihood threats to the individuals within the area.
In accordance with stories revealed by the Worldwide Centre for Built-in Mountain Growth (ICIMOD), the glaciers in Hindu Kush Himalaya are melting at double the speed since 2000.
Whereas the precise trigger for the tragedy in Nepal has not been established but, one of many attainable explanations for the floods appears to have been a phenomenon known as a glacial avalanche. On this context, the stories take renewed significance. The stories, titled Changing Dynamics of Glaciers in the Hindu Kush Himalaya Region from 1990 to 2020 and HKH Glacier Outlook 2026: Insights from 50 Years of Himalayan Glacier Monitoring, have been launched to mark World Glaciers Day.
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What do the stories say on Hindu Kush Himalaya glaciers?
The stories say the Hindu Kush Himalaya (HKH) glaciers are melting at an accelerating price, with ice loss charges doubling for the reason that yr 2000. They additional reveal a complete lack of as much as 27 metres of ice thickness since 1975, in line with ICIMOD, which additional said that this raises concern for the practically two billion individuals downstream who rely on meltwater.
The Hindu Kush Himalaya has over 63,700 glaciers overlaying practically 55,782 sq. kilometres, that are the supply of at the least ten main Asian river programs and assist the livelihood safety of billions.
Nonetheless, in line with the stories, round 78% of this glacier space, positioned between 4,500 and 6,000 metres above sea degree is extremely uncovered to elevation-dependent warming. ICIMOD director common Pema Gyamtsho stated within the report that it was a “disaster unfolding in real-time.”
The stories spotlight that glacier losses are spatially skewed, with the best proportion of space loss within the jap Hengduan Shan mountains, the place some areas misplaced as much as 33% of their glacier space in simply three many years. Nonetheless, the biggest absolute space losses are concentrated within the Indus, Ganges, and Brahmaputra basins, the place over 74% of the area’s glaciers are discovered, underlining their vital vulnerability, in line with ICIMOD.
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Glacier broke free, created momentary dam: What prompted the flash floods?
A surge of water swept via the Bhote Koshi and Trishuli valleys in Nepal and Tibet on August 26, with at the least 800 individuals killed within the tragedy and over 3,000 lacking.
The catastrophe reportedly started with a 600-metre-wide part of a glacier within the Himalaya mountains breaking free and dropping 1.2 km into the valley beneath. The kinetic vitality of the autumn melted sufficient of the ice to create a slurry that gathered additional materials because it travelled, till it arrived on the backside of the valley, which it blocked, The Economist reported. Water then backed up behind this dam till its strain overwhelmed the blockage, inflicting a surge.
