In these regions there are vast ice-caps formed by snow that has fallen over the past 50,000 years.
在这些地区有巨大的冰帽，是由过去5万年的降雪形成的。
2
As the climate warms (up) the icecaps will melt.
随着气候变暖，冰盖将融化。
《牛津词典》
3
If this warming up took place, the icecaps in the poles would begin to melt, thus raising sea level several metres and severely flooding coastal cities.