introduction to periglacial enviroments

HideShow resource information

what are periglacial enviroments?

  • seasonal snow and ice cover characterised by intense frost normally associated with permafrost.
  • permafrost is ground that remains on or below freezing for at least 2 years.
  • the uppermost layer of the permafrost often thaws in the summer and freezes in the winter, many processes occur with in this layer called the active layer.
  • these processes create distinctive landforms.

factors that determine the thickness of the active layer

  • air temperature- latitude, continentality, levels of insolation
  • period of snow cover or period of time without snow cover
  • soil type- grainy soil is less dense and so has larger pore spaces, this means more air can get into the ground and melt the active layer more, clay soil is denser


No comments have yet been made

Similar Geography resources:

See all Geography resources »See all Hot and cold environments resources »