Growing anecdotal evidence, from climbers and local people, suggests climate change is making a strong impact even well above the 8,000m line, with signs of melting ice on the southern approach to Everest.
"When I climbed Mount Everest last year I climbed the majority of ice without crampons because there was so much bare rock," said John All, an expert on Nepal glaciers from the University of Western Kentucky. "In the past that would have been suicide because there was so much ice."
He said the terrain he crossed was very different from the landscapes described by earlier generations of climbers. Historic photographs of the Everest region also showed a longer and deeper covering of ice.
Everest Base Camp, which occupies a high rocky plateau next to the Khumbu glacier, has undergone similar changes, said Tshering Tenzing Sherpa, who has overseen rubbish collection at the site for the past few years. The summer monsoon months brought several deep new crevasses in the black ice beneath the rocks, he added. "Everything is changing with the glaciers."
Amid such evidence, a new international effort to gauge the effects of climate change in the Himalayas – and shield local people from potential hazards. A US-funded mission, led by the Mountain Institute, is meeting in Kathmandu to try to find practical solutions to the threat of catastrophic high-altitude flooding from lakes forming at the foot of melting glaciers, reports the Guardian.