The Amazon Flashcards

1
Q

what fraction of the world’s biomass is in the Amazon?

A

1/5

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2
Q

How many trees are in the Amazon?

A

300 billion

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3
Q

How many countries is the Amazon in?

A

9

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4
Q

What fraction of the world’s carbon is stored in the Amazon?

A

1/5

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5
Q

How much of the Amazon has been lost since 2005?

A

17%

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6
Q

How much rainfall do some areas of the Amazon have annually?

A

6000mm

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7
Q

What is the ITCZ?

A

intertropical convergence zone; where two winds, coming from area of high pressure between hadley and ferrel cells, meet, at an area of low pressure between 2 hadley cells

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8
Q

What % of photosynthesis occurs in the Amazon?

A

30-50%

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9
Q

How much is biomass increasing annually in the Amazon?

A

0.5%

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10
Q

How much carbon does the Amazon absorb?

A

2.2 billion tonnes

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11
Q

What are 2 threats to the Amazon?

A
  • climate change
  • deforestation
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12
Q

How much is temperature expected to increase in the Amazon by 2050?

A

2-3C

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13
Q

If all fossil fuel emissions stopped, how much warming has been committed to?

A

2C

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14
Q

How many trees would die if temperatures rose by 2C?

A

20-40%

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15
Q

How many trees would die if temperatures rose by 3C?

A

75%

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16
Q

What is the biggest cause of deforestation in the Brazilian Amazon?

A

pasture, 63%

17
Q

What % of Brazil’s greenhouse gas emissions are from deforestation?

A

75%

18
Q

How does burning trees impact precipitation?

A

reduced due to more condensation nuclei and fewer heavy clouds

19
Q

How much did fires increase in the first 9 months of 2020 compared to 2019?

A

13%

20
Q

If environmental and deforestation policies from 2002 continue, what is the predicted impact on rainfall by 2050?

A

Decrease by 21% in dry seasons and 12% in wet seasons

21
Q

How much rainfall is recycled in tropical rainforests?

A

25 - 56%

22
Q

What percentage of Brazils electricity is from hydroelectric power?

A

65%

23
Q

What percentage of Brazil’s land is protected under environmental law?

A

25%

24
Q

What is the average deforestation rate in the Amazon?

A

1.4 million hectares

25
Q

What did the vice president claim the anticipated increase in deforestation was? What was me increase between 2019 - 2020?

A

20% anticipated; 9.5% real

26
Q

How does deforestation and climate-change impact rivers?

A
  • Reduces river discharge in the long-term
  • flash flooding
  • kill off species
27
Q

How do changes to the Amazon impact the Carbon cycle?

A
  • surface runoff and soil erosion
  • decrease respiration
  • carbon released in fires
  • less photosynthesis
  • less decomposes
  • small inefficient plants
28
Q

How much did Brazil cut deforestation by, by 2005?

A

80%

29
Q

How much untouched forest do landowners have to preserve?

A

80%

30
Q

What percentage of the Amazon’s water stays in the Amazon?

A

50-80%