Types of permafrost

Question 1

Peri-glacial

Answer 1

On the edge of glacial areas

E.g. Northern Canada, Siberia (north Russia)

Question 2

Permafrost definition

Answer 2

Ground that has been frozen for two or more consecutive years

Question 3

Continuous permafrost

Answer 3

Solid block of frozen ground
Active layer may be 0.5m thick
Frozen ground extends to 400average temperatures of -12°c

Question 4

Discontinuous permafrost

Answer 4

Permafrost is broken up and has gaps between it with layers of talik (unfrozen soil)
Extends to 50m
Temperatures of -5.5°c

Question 5

Sporadic permafrost

Answer 5

Patchy permafrost
Active layer of 1.5-3m
Depths of 10m

Question 6

Active layers in permafrost

Answer 6

Can range from 0.5m to 4m depending on the type of permafrost

Question 7

(Isolated permafrost)

Answer 7

Very patchy permafrost
Active layer 4m
Temperatures of -1°c - 0°c