I want to know the answer to the following question:
What cause the glaciers to descend to permafrost levels in some areas?
All the background I'm provided with is that "High levels of precipitation cause the glaciers to descend to permafrost levels in some areas whereas in other, more arid regions, glaciers remain above about the 3,500 m (11,483 ft) level.". Is that enough to answer the question?
Answer: yes