南极是一个终年被冰雪覆盖的大陆，冰雪的平均厚度约为2450米，总冰量达30．lxldo立方米．占全球淡水资源总量的85％以上。冰川学家将这一巨大的冰块称为南极冰盖．而Dome－A是这个巨大冰盖的最高』犬。从它的表面到南极大陆岩石地面．冰盖最厚处达4700米，被压在最低层的冰雪 The Antarctic is a continent covered with snow and ice all year round. The average thickness of snow and ice is about 2,450 meters and the total ice volume is 30. lxldo cubic meters. Accounting for more than 85% of the total global freshwater resources. Glaciologists refer to this huge piece of ice as the Antarctic ice sheet. Dome-A is the highest dog in this huge ice cap. From its surface to Antarctica’s rocky ground. The ice sheet at the thickest 4700 meters, was the lowest in the snow and ice