经过长达半个多世纪的保护观测和反复试验,专家们日前指出,积沙、风蚀、粉尘是引起莫高窟壁画脱落、彩塑受损、岩体坍塌的三大风沙危害。地处敦煌市东南25千米的莫高窟,与中国八大沙漠之一的库姆塔格沙漠相毗邻。它东邻三危山,西接鸣沙山,受蒙古高压影响。这里长期干旱,降水稀 After more than half a century of conservation observations and trials, experts pointed out recently that sand accumulation, wind erosion, and dust are the three major sand hazards that caused the murals of the Mogao Grottoes to fall off, damage to colored sculptures, and collapse of rock masses. Located 25 kilometers southeast of Dunhuang, the Mogao Grottoes is adjacent to the Kumtag Desert, one of the eight deserts in China. It is adjacent to Sanweishan in the east and Mingsha Mountain in the west, which is affected by the high pressure in Mongolia. Long-term drought here, precipitation lean