supported by National Natural Science Foundation of China (Grant No.40871040);CAS Action Plan for the Development of Western China (Grant No.KZCX2-XB2-10);Research Projectof State Key Laboratory of Frozen Soil Engineering (Grant No.SKLFSE-ZQ-06)
Climate warming must lead the mainly air temperature controlled permafrost to degrade.Based on the numerical simulation,the process of permafrost degradation can be divided into five stages,i.e.,starting stage,tempera...