GEOG 272 Lecture Notes - Lecture 22: Cryosphere, Supersaturation, Geomorphology

• School: McGill University
• Department: Geography
• Course: GEOG 272
• Professor: Wayne H Pollard

Document Summary

We have gone over this in the last two lectures as well. This is an aerial shot, we are looking from above. We have polygon features, there are some green areas along the edges (this might indicate something: you do need to know this for the final. This is an ice wedge: this will be a question on the exam know about ice wedges for the exam. Permafrost is frozen ground material that has remained frozen for at least 2 or more consecutive years. It is those two consecutive years that is important for it to be considered permafrost. There are two types: continuous and discontinuous. Even though we have the active layer the layer that thaws at the surface every summer, the permafrost underneath the layer is still continuous: this does(cid:374)"t i(cid:374)(cid:272)lude the a(cid:272)ti(cid:448)e la(cid:455)e(cid:396) Discontinuous is areas that are patchier, areas with unfrozen ground and then areas with frozen ground.