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一、中国冻土的类型及分布中国冻土可分为季节冻土和多年冻土。季节冻土占中国领土面积一半以上,其南界西从云南章凤,向东经昆明、贵阳,绕四川盆地北缘,到长沙、安庆、杭州一带。季节冻结深度在黑龙江省南部、内蒙古东北部、吉林省西北部可超过3米,往南随纬度降低而减少。中国多年冻土总面积为全国领土面积的1/5强,可分为高纬度多年冻土和高
First, the type and distribution of frozen soil in China China’s frozen soil can be divided into seasonal frozen soil and permafrost. Seasonal frozen soil accounts for more than half of China’s territory, the southern boundary of its west from Yunnan Zhang Feng, eastward through Kunming, Guiyang, around the northern margin of the Sichuan Basin, to Changsha, Anqing, Hangzhou area. The season freezing depth can be more than 3 meters in the south of Heilongjiang Province, northeast of Inner Mongolia and northwestern Jilin Province, and decreases to the south as the latitude decreases. The total area of permafrost in China is one fifth of China’s territorial area, which can be divided into high-latitude permafrost and high