1.   In dry polar deserts ahumic soils tend to remain ahumic indefinitely.

2.   It takes one to the high, isolated polar desert at the height of the summer season.

3.   Many tundra species occur in polar desert and forest as well, but only in tundra do they dominate their communities.

4.   Similarly the term polar desert covers both the area and the vegetation characteristic of it.

5.   Devon Island is a polar desert with a meteorite impact crater that has a geology very similar to Mars.