Nepal Glaciers Shrink By Quarter In 30 Years

Climate crisis has caused Nepal 's Himalayan glaciers to shrink by nearly a quarter in just over 30 years, said a scientist.

The glacier loss raises the risk of natural disasters in the ecologically fragile region.

A new study by the Kathmandu-based International Centre for Integrated Mountain Development (ICIMOD) shows that the area covered by glaciers has decreased by 24 per cent between 1977 and 2010.

Samjwal Ratna Bajracharya, lead author of the report, said “the shrinking of glaciers in Nepal is definitely connected to climate change; glacial melt is a huge indicator of rising temperatures.”

Under the three-year study led by ICIMOD scientists mapped satellite imagery from several decades to find the extent of ice loss in the region.

The fastest decline occurred between 1980 and 1990, said Bajracharya. Prior to the late 1970s, satellite imagery reflected little change in Nepal 's glacial area.

He said the glacial melting is creating huge, expanding lakes that threaten to burst and devastate mountain communities living downstream.

The accelerated glacial loss raises concerns over future access to water resources, particularly in regions where groundwater is limited and monsoon rains are erratic.

“If the trend continues, the immediate impact will be felt by those living in high-altitude regions, which are dependent on freshwater reserves from glaciers,” said Bajracharya.

The findings also sound alarm bells for Nepal 's push to develop hydropower projects.

“ Nepal cannot use its water resources to develop the country without assessing the state of our glaciers and river basins,” he said.

A government report in India recently blamed hydropower projects for devastating floods last year that killed thousands in India and Nepal .

The government panel said the build up of sediment in rivers, due to the dumping of soil that was dug up during construction of hydropower projects, exacerbated flooding when record-high rainfall hit the region last June.

It should be mentioned that the Himalayan region abounds in glaciers. Most of the big glaciers lie in the eastern Himalayas .

As the western Himalayas receive only a small amount of rainfall, barring the formation of vast snowfields, the source of some of the big rivers of Nepal are in fact glaciers.

Nepal 's largest glacier lies in the Mahalangur and the Kumbhakarna ranges. Khumbu is the biggest glacier and Langtang the longest. Kanchenjunga , Yalung, Nupchu and Langtang are some other glaciers belonging to the eastern Himalayas . Tukche and Hidden valley glaciers belong to the central Himalayas but these are comparatively small.

The Khumbu glacier is situated between Mount Everest and the Lhotse-Nuptse Ridge. It is seen flowing down between the two mountains and swerving right through the Khumbu valley. The terrain is gray and rocky. More

 

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Expecting the Unexpected: Abrupt Climate Change

Senior scientists discuss the potential for abrupt disruptions of human and natural systems as a consequence of climate change.

Tibetan Plateau glaciers shrinking

About 90 per cent of glaciers in the Third Pole region are shrinking, accelerated by black carbon being transferred from South Asia to the Tibetan Plateau, a top scientist has warned.

Change between 1968 and 2007

The Third Pole region, which is centred on the Tibetan Plateau and concerns the interests of the surrounding countries and regions, covers more than 5 million square kilometers and has an average altitude of more than 4,000 meters.

The area has the largest number of glaciers outside the polar regions and exerts a direct influence on the social and economic development of some of the most densely populated regions on earth, including China and India.

The glaciers are at the headwaters of many prominent Asian rivers.

Influenced by global warming, its alpine glaciers have seen drastic changes in recent years, such as thinning and shrinkage, which pose potential geological hazards to people both on and around the plateau.

Like Antarctica and the Arctic, the Third Pole is drawing increased attention from the international academic community, but the results of former international studies in this area are inconsistent, said Yao Tandong, director of the Chinese Academy of Sciences' Institute of Tibetan Plateau Research.

The scientist, a member of the Chinese People's Political Consultative Conference National Committee, said some people believe the glaciers will retreat and finally disappear by 2030, while others argue they will remain unchanged.

There are even people who argue that the glaciers have even moved forward, he said.

Researchers at Yao's institute say they can now draw a more comprehensive picture of the region, by showing data on the glaciers' status over the past 30 years. An investigation using topographic maps and satellite images revealed the retreat of 82 glaciers, area reduction by 7,090 glaciers and the mass-balance change of 15 glaciers.

"Systematic differences in glacier status are apparent from region to region, with the most pronounced shrinkage in the Himalayas, the southeastern part of the region.

Some of the glaciers there are very likely to disappear by 2030," Yao said. More

 

Melting Glaciers Cause Droughts, Floods; Norway Helps Himalayas

The valley of Chitral has always looked to the 

glaciers of Tirich Mir for water.  (Photo by Amina Tariq)

CANCUN, Mexico, December 7, 2010 (ENS) - Climate change is causing mass loss of glaciers in high mountains worldwide. Within a few decades, melting glaciers could leave arid areas such as Central Asia and parts of the Andes even drier as the ice melts into water and flows downhill, causing disastrous floods in the lowlands, finds a new report by the UN Environment Programme presented today at the UN climate talks in Cancun.
Compiled by UNEP's Polar Research Centre GRID-Arendal and experts from research centers in Asia, Europe, Latin America and North America, the report says the larger glaciers may take centuries to disappear but many low-lying, smaller glaciers, which are often crucial water sources in dry lands, are melting much faster.

Glacial melt will change the lives of millions as over half of theworld's population lives in watersheds of major rivers originating in mountains with glaciers and snow.
Glaciers in Argentina and Chile, followed by those in Alaska and its coastal mountain ranges, have been losing mass faster and for longer than glaciers in other parts of the world, finds the report, "High Mountain Glaciers and Climate Change - Challenges to Human Livelihoods and Adaptation." More >>>