There are also ice-climbing courses and ice treks available.
同时还有攀冰课程和冰上远足。
2
Now imagine that the ice sheet is vertical rather than horizontal. This should give you some sense of the challenge of ice-climbing.
现在想象一下把水平的冰面立起来，这就会让你有攀冰的感觉。
3
This is troubling as climbing arctic temperatures combined with rapid sea ice loss are creating a new type of climate feedback loop which could accelerate Arctic warming.