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一、雪线的概念雪线是反映气候现象的空间概念,是年固体降水量等于消融量的零平衡线,是地球上多个积雪区的最低界限。雪线是冰川学上一个重要的标志,它控制着冰川的发育和分布。雪线以上年降雪量大于消融量,降雪逐年加积,形成常年积雪。只有山体高度超过该地的雪线,每年才会有多余的雪积累起来。年深日久,才能成为永久积雪和冰川发育的地区。在雪线以下,气温较高,全年冰雪的补给量小于消
I. The concept of the snow line The snow line is a spatial concept that reflects the climate phenomenon. It is a zero-balance line in which the annual solid precipitation equals the amount of ablation, and is the lowest limit of many snow-covered areas on the earth. The snow line is an important symbol of glaciology, which controls the development and distribution of glaciers. The annual snowfall above the snow line is greater than the amount of ablation, and snowfall accumulates year after year to form snow accumulation all year round. Only the snow lines where the height of the mountain exceeds the area will have surplus snow accumulated every year. It will only become a region where permanent snow and glaciers develop. Below the snow line, the temperature is higher, and the annual replenishment of ice and snow is less than