【摘要】 <正> 贡嘎山位于四川省大雪山南端,在强烈的喜马拉雅运动影响下,新构造运动十分活跃,是我国最东部一座7000米以上的高峰。1981年,我们对贡嘎山的雪崩与冰川进行了考察。更多还原

【Abstract】 There are totally 72 glaciers in the Mt. Gongga area of which five are larger ones. Hai luogou Glacier, the largest, is 15 km long. The snowline there lies at 4800-5000 m a.s.l.. The annual precipitation may be over 1000 mm at an elevation of 5000 m. Therfore, avalanches and ice falls often occur and supply material to the glaciers. The amount of accumulation from avalanches makes up 44%, 53% and 84% of the total accumulation for glaciers Nos. Ⅰ ,Ⅱ and Ⅰ respectively.Avalanches have strong influence on the ablation of glacier. On the one hand a glacier is dissected into clastic ice by avalanches and ice falls, accelerating ablation. On the other hand,avalanches and ice falls dropping from an elevation of 6000m to an elevation of 3600 m,take up a sudden increase in temperature at 8℃ in two-three minutes, shortening the process of ablation.The ice layers from avalanches and ice falls are the basic structure of glaciers at Hailuogou,an internal factor for the formation of specific structure in ice at the glacial tongue area.更多还原