西伯利亚冻原位于西伯利亚北部,沿北极冰盖边缘绵延3200千米,是一片广阔的大平原,湖泊和沼泽星罗棋布,大部分地区长满了苔藓,冻原的下层土都是永久冻土,最厚的冻土层深达1370米。冬季,所有土壤都变成坚硬的冻土;夏季,最 The Siberian tundra is located in the north of Siberia and stretches 3,200 kilometers along the edge of the Arctic ice cap. It is a vast expanse of plains. Lakes and swamps are dotted with mosses. Most of the areas are covered with moss. The lower layers of the tundra are permafrost and the thickest. The depth of the frozen soil reaches 1,370 meters. In winter, all soils turn into hard frozen ground; in summer, the most