Zone of Peace
Glaciers in and around Tibet shrink at alarming rate
23 Feb 2009, 1326 hrs IST, IANS Economic Times
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WASHINGTON: A three-year study shows that glaciers in the Yangtze source
area, central to the Qinghai-Tibet plateau in south-western China, have
receded 196 square kilometres over the past 40 years.
Glaciers at the headwaters of the Yangtze, China's longest river, now
cover 1,051 square km compared to 1,247 square km in 1971, a loss of
nearly a billion cubic metres of water. The tongue of the Yuzhu glacier,
the highest in the Kunlun Mountains, fell by 1,500 metres over the same
period, showed the study, to be used by the China Geological Survey
Melting glacier water will replenish rivers in the short term, but as
the resource diminishes drought will dominate the river reaches in the
long term. Several major rivers including the Yangtze, Mekong and Indus
begin their journeys to the sea from the Tibetan plateau, one of the
largest land-based wilderness areas left in the world.
"Once destroyed it will be extremely difficult to restore the
high-altitude ecosystems," said Li Lin, head of Conservation Strategies
for WWF-China. "If industrialized and developing countries do not focus
their efforts on cutting emissions, some of this land will be lost
forever and local populations will be displaced."
Glacier retreat has become a major environmental issue in Tibet,
particularly in the Chang Tang region of northern Tibet. The glacier
melting poses severe threats to local nomads' livelihoods and the local
economy, according to a WWF release.
The most common impact is that lakes are increasing due to glacier
melting and some of the best pastures are submerged. Meanwhile small
glaciers are disappearing due to the speed of glacier melting and
shortage of drinking water has become a major issue.