ents
found towards the northpole and south pole where the levels of insolation are low
found at highaltitudes itempdecreases no.cperroom
aridenvironments
found by thetropicshighpressuresystemswhich limit the potential for rainformation
found in places farfromsea
conditions
coldenvironments
soil thinand hashighrate of surface runoff
warmdays verycoldnights
arid environmets
lackofwater
hightemp allyearround
challenges in extreme environments forpeople
SEEmacrost collapsing buildings
solutionraisingbuildingsaboveground
watersupply watersupply in longstretches of permafrost
iii iii frost near
replaced withgravel water drains better
an in this
lowrainfall
extremelyhighdaytimetemperature
inaccesibility partlydue to lack of water
remoteness
Advance and retreat of glaciers
accumulation ablation glacierstaysstationary
Glacial Erosion
plucking as the ice moves meltwater steeps into thejointsandfreezes to the rock which is then ripped out
by the glacier involvespressurefrom the expanding water water ice expands
, abrasion the debriscarried by the glacier scrapes and scratches the rock leaving striations As the ice
movement continues the glacierload will be worn down
Landforms produced by glacial erosion
cirques
Description
ampitneatershapedvalley
the glacierretreats a tarn may form esmancake
jags
1 ice accumulates in a nonow
2 as thesnowpatchgetsbigger the icedeepens the nonow anderodes the floorthroughabrasion and plucking
Arete
Description
sharpridge
steepsided
cirques areformed adjecent to eachother
2 Asharpridge in between bothcirques is formed akaarete
pyramidal peak
formed fromthree or morearetesform
steepsided and sharpedges
ushapedvalley
Description
steep
ruggedwars