Rising temperatures in the Himalayas have led to an alarming increase in glacial lakes. According to a recent study published in the journal Nature, the number of glacial lakes in the region has surged by 1,362 over the past nine years. The research, conducted by the University of Zurich and the University of Leeds, utilized satellite data to track changes in glacial lakes across the Himalayas from 2015 to 2022. The findings indicate that the region has witnessed a significant rise in the number of glacial lakes, which are formed when meltwater from glaciers accumulates in depressions. The study revealed that the total number of glacial lakes in the Himalayas has increased from 4,575 in 2015 to 5,937 in 2022. This represents a 30% increase over the seven-year period. The researchers attribute the growth in glacial lakes to rising temperatures and the resulting increase in glacier melt. As the planet continues to warm, glaciers in the Himalayas are melting at an unprecedented rate, leading to the formation of new glacial lakes. The study's lead author, Dr. Daniel, stated that the increase in glacial lakes poses a significant threat to communities living downstream. "Glacial lakes can be a source of freshwater, but they also pose a significant risk of glacial lake outburst floods," he said. Glacial lake outburst floods occur when a glacial lake suddenly bursts, releasing massive amounts of water downstream. These events can be devastating, causing widespread destruction and loss of life. The Himalayas are particularly vulnerable to the impacts of climate change, with rising temperatures and changing precipitation patterns affecting the region's glaciers and ecosystems. The study's findings highlight the need for continued monitoring and research into the impacts of climate change on glacial lakes and communities in the Himalayas. The research was funded by the University of Zurich and the University of Leeds, and the data used in the study was provided by the European Space Agency.
A devastating surge in melting glaciers has led to a 1362% increase in glacial lake outburst floods (GLOF) in the Himalayas over the past nine years. Scientists warn that by the end of the 21st century, up to 75% of the region's glaciers could vanish due to climate change. In a recent interview with CNN, Professor Dan McGraw from the University of Colorado Colorado Springs stated that there are approximately 95,000 glaciers in the Asian highlands, covering an area comparable to that of South Korea.
He added that all the melted glacial water could fill New York's Manhattan Island up to the height of the Empire State Building, excluding the spire. Dr. Jason Gulli, a glaciologist at the University of South Florida, likened the melting glaciers to a time bomb, suggesting that if carbon dioxide emissions continue unchecked, the world could see a 75% loss of Himalayan glaciers by 2100.
The immediate cause of the recent surge is believed to be a massive collapse of glaciers and ice sheets in the Rangitri Khola region of Nepal's capital, Katmandu. While it's unclear whether this collapse was directly caused by climate change, scientists caution that as the glaciers melt and the permafrost destabilizes, the risk of glacial and rock avalanches and resulting landslides and mudslides will increase.
The international research organization International Centre for Integrated Mountain Development (ICIMOD) reports that the rate of glacier loss in Central Himalaya, particularly in Nepal, is significantly higher than the global average. Between 1990 and 2020, the total glacial area in the region decreased by 12%, but in Central Himalaya, it dropped by 21%, making it the most rapidly shrinking region.
This rapid loss of glaciers threatens the water supply of the Ganges River, which serves billions of people, and exacerbates the risk of GLOF. In 2017, there were 5498 glacial lakes in the Himalaya-Karakoram region, a 1362% increase from 2008. The International Centre for Integrated Mountain Development and the United Nations Development Programme (UNDP) estimate that 47 of the 3624 glaciers in the HKH region are at high risk of collapsing.
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