evidence: Climate effects will "change the experience" of Everest climbs as more bedrock is exposed in place of snow and ice, and icefalls and avalanches become more "dynamic", the study said. Melting glaciers could also "destabilise" base camp that houses about 1,000 climbers and logistics team during the peak season. [...] This year saw unusual snowfall that normally occurs during the winter months, Ang Tshering Sherpa, former president of the Nepal Mountaineering Association, told AFP. This heightened the risk of an avalanche since fresh snow is soft, he said. [...] The season has also seen dramatic rescues and milestones. Last month, Nepali guide Gelje Sherpa carried a Malaysian climber down from 8,500m above sea level over the course of six hours.