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Summary Amazon Rainforest - Water & Carbon Cycle £2.99
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  7. Unit 1 GEOG1 - Physical and Human Geography

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Summary Amazon Rainforest - Water & Carbon Cycle
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In depth fully analysed and evaluated revision notes. Written to A – A* standards for AQA A-level. An abundance of statistics and facts to be used in exams in order to get you to Level 4 standard of exam answers.

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  • Water
  • April 28, 2020
  • 3
  • 2019/2020
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AMAZON RAINFOREST
World’s largest tropical rainforest – covers 40% of the South American landmass
1-3 Gtc of carbon / up to 430 inches of rainfall per year



WATER CYCLE
 There is a considerable amount of evaporation over the Atlantic Ocean, and the wet
air is blown towards the Amazon. This contributes to the Amazon’s very high rainfall

 Warm temperatures mean that evaporation is high in the rainforest itself, which is
increases the amount of precipitation

 The rainforest has a dense canopy – this means that interception is high. As a result,
less water flows into rivers and surface runoff occurs at a slower rate




CARBON CYCLE
 The amazon rainforest stores lots of carbon in its vegetation and soil, so it’s a carbon
sink

 The increasing concentration of CO2 in the atmosphere has led to increased
productivity in the rainforest because the vegetation is able to access more CO 2 for
photosynthesis – amount of biomass has been increasing

 As a result, the amount of CO2 sequestered by the rainforest has increased, making it
an even more important carbon store

 However it has been suggested that although trees are growing more quickly,
they’re dying younger too – this means the Amazon may not be as effective as a
carbon sink in the future




HUMAN ACTIVITIES – DEFORESTAION
 In deforested areas there is no tree canopy to intercept rainfall, so more water
reaches the ground surface. Therefore the soil is saturated more quickly – surface
runoff occurs at a faster rate – water moves into rivers, increasing the risk of flooding

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