Chinese researchers find link between climate change and glacial collapse, warn of increasing disaster risks, Pg16

Key Highlights:

• A glacial collapse occurred on August 26 on the Nepal-China border, linked by Chinese experts to rising temperatures and significant glacial retreat on the Qinghai-Tibet Plateau.
• The glacier area on the Qinghai-Tibet Plateau has decreased from 51,000 sq. km to 39,000 sq. km over six decades.
• Glaciers in the southern part of the plateau, including the Gangdise Mountains, Nyenchen Tanglha Mountains, and the Himalayas, have shrunk by approximately 40% in the last 60 years.
• Overall, glaciers across the entire Qinghai-Tibet Plateau have shrunk by 24%.
• This retreat has led to a substantial increase in the number and size of glacial lakes, with over 14,000 now mapped on the plateau, rapidly expanding.
• The expansion of these glacial lakes, particularly near China's southern borders, poses increasing risks of Glacial Lake Outburst Floods (GLOFs) and other disasters for India and Nepal.

Glacial Collapse.jpg

Detailed Insights:

• The Institute of Mountain Hazards and Environment of the Chinese Academy of Sciences highlighted global warming as the primary driver of glacial melting.
• The rapid expansion of glacial lakes significantly heightens the risk of Glacial Lake Outburst Floods (GLOFs), landslides, and other related disasters.
• The vulnerability of downstream regions in India and Nepal necessitates closer monitoring and data sharing regarding glacial lake expansion.
• The Qinghai-Tibet Plateau is crucial as the "Water Tower of Asia," feeding major rivers like the Indus, Brahmaputra, Yangtze, and Yellow, which support billions of people.
• The Himalayas, being young and seismically active mountains, are inherently vulnerable to hazards, with climate change acting as a force multiplier for disaster severity.
• Increased glacial melt and the formation of new glacial lakes are a direct consequence of rising temperatures in the region.

Key Concepts Involved:

• Qinghai-Tibet Plateau: The highest and largest upland area on Earth, significantly influencing Asian climate and river systems.
• Glacial Lake Outburst Flood (GLOF): A sudden release of a large volume of water from a glacial lake due to the breach of its natural dam, often caused by glacial retreat.
• Glacial Retreat: The process where glaciers melt faster than they accumulate snow, leading to a reduction in their size and mass over time.