连续冻土

沿线地质条件复杂，经过多年连续冻土地段550公里。

The railway will pass areas with complex geological conditions , including a 550-km-long frozen soil section .

在连续冻土区内，年平均地温升高0.1～0.2℃。

Annual mean ground temperature has been rised by 0.1 & 0.2 ℃, and thickness of permafrost has not been changed obviously in the continuous permafrost .

岛状多年冻土和季节冻土区年均地温升高约03～07℃，大片连续多年冻土区升幅较小，为01～04℃。

Annual mean ground temperature increases about 0.3 ~ 0.7 ℃ in island permafrost and seasonal frozen ground areas , and about 0.1 ~ 0.4 ℃ in predominantly continuous permafrost area .

土壤动物多样性分析表明，中小型土壤动物的多样性指数从岛状冻土带到连续多年冻土带逐渐减小，而大型土壤动物的多样性指数在不同冻土带间的变化规律不明显。

The analysis of soil fauna diversity indicated that the diversity index of meso / microfauna declined from the island tundra to the continuous tundra , whereas the diversity index of macrofauna did not show any obvious law of variation between tundra s.