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A Level Geography - Glaciation > Arctic > Flashcards

Flashcards in Arctic Deck (5)
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1
Q

Extremity

A

Quite extreme
Parts are 20°c warmer than they should be
Ocean temperatures are 4°c warmer than usual

2
Q

Effects (positive feedback)

A

Positive feedback loop - less ice so more vegetation, so more suns energy absorbed (albedo) so gets warmer, and so on…

3
Q

Effects (permafrost)

A

As it gets warmer, permafrost thaws, methane and co2 are produces, greenhouse gasses, so it gets warmer, and so on…
The release of methane can increase the temp by up to 0.5°c and it is 30x stronger insulator than co2

4
Q

Effects (sea exposed)

A

Ice melts so more dark ocean exposed so less suns energy reflected (albedo) so it absorbs heat so it gets hotter

5
Q

Other effects

A

Communities like vuntut gwitchin, way of life threatened
Settlements may be threatened
Ecosystems threatened (polar bears fish a lot of the time but need to rest on ice, number of icebergs has decreased.)
Monsoon over Asia could be disturbed tpdutpe to warmer oceans