晴朗的夏天,驻守在帕米尔高原喀喇昆仑山的国防战士,能清晰地看到一条黑白分明的界线横过山腰,线以上是银光闪烁的冰雪世界,这条界线,称为雪线。雪线是离蓝天最近的地方,是很多人可望不可及的一个高度,被当地人称为“神圣”的地方。确切地说,雪线指的是某一个海拔高度,这个高度以上气温较低,全年冰雪的补给量大于消融量,降雪逐年加积,形成常年积雪(或称万年积雪),进而变成粒雪和冰川:在这 On a clear summer day, the defense fighters stationed in the Karakorum Mountains of the Pamir Plateau can clearly see a black-and-white line across the mountainside above the silver-tinged ice-cold world, called the snow line. The snow line is the closest to the blue sky, a place that many people can not reach and is called “sacred” by the locals. Specifically, the snow line refers to a certain altitude above this altitude, the temperature is low, the annual supply of ice and snow is greater than the volume of ablation, snow accumulates year by year, the formation of perennial snow (or snow years), and then change Granulated snow and glaciers: here