climate change

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what are the two main ways heat circulates around the earth?
global atmospheric circulation and ocean currents
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what are the two types of ocean currents?
surface currents (caused by winds)
deep ocean currents (caused by differences in water density)
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what is the thermohaline circulation?
deep ocean currents (when water freezes at the poles the surrounding water gets saltier increasing its density, so it sinks, and warmer water flows in at the surface)
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what are the names of the 3 cells involved in the pressure belt?
Hadley
Ferrel
Polar
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what does high pressure cause?
dry (arid) areas with little rainfall
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what causes high pressure?
the sinking of cool air?
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what does low pressure cause?
high rainfall and usually temperatures are hot (tropical)
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what causes low pressure?
warm are rising (e.g., Hadley cells at the equator)
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what are the three natural causes of climate change?
orbital changes
volcanic activity
solar output
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what are 4 things that evidence climate change?
-declining arctic ice
-sea level rise and warming oceans
-global temperature rise
-extreme weather events
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what impacts could climate change have on humans?
-increased deaths due to heat
-places becoming impossible to live in (too hot to grow things, low-lying coastal areas will flood)
-migration to other areas will make them overpopulated
-low crop yield (malnutrition, ill health, death)
-money is being spen
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what methods are used to see natural climate change?
-tree rings
-ice cores
-historical records
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what human activity is increasing the rate of climate change?
-industry
-transport
-deforestation
-agriculture
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Other cards in this set

Card 2

Front

what are the two types of ocean currents?

Back

surface currents (caused by winds)
deep ocean currents (caused by differences in water density)

Card 3

Front

what is the thermohaline circulation?

Back

Preview of the front of card 3

Card 4

Front

what are the names of the 3 cells involved in the pressure belt?

Back

Preview of the front of card 4

Card 5

Front

what does high pressure cause?

Back

Preview of the front of card 5
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