Lecture 3

Question 1

The global carbon cycle can be divided into two categories:

Answer 1

geological
biological-physical,

Question 2

geological global carbon cycle

Answer 2

operates over large
time scales (millions of years)

Question 3

operates over large
time scales (millions of years)

Answer 3

geological global carbon cycle

Question 4

bio-physical global carbon cycle

Answer 4

operates at shorter time scales (days
to thousands of years)

Question 5

operates at shorter time scales (days
to thousands of years)

Answer 5

biological-physical global carbon cycle

Question 6

The global carbon cycle is usually thought to have four major carbon sinks

Answer 6

1. the atmosphere,
2. the terrestrial biosphere (which usually includes freshwater systems and non
3. the oceans
4. and the sediments

Question 7

CARBON POOLS

Answer 7

Schematic diagram showing the stand level model of the carbon dynamics of forests. Each pool is a potential atmospheric carbon sink. Respiration (Rt) and fire are pathways that lead to carbon sources. Exports and long-term human use of forest products are flows that lead to carbon sinks

Question 8

Schematic diagram showing the stand level model of the carbon dynamics of forests. Each pool is a potential atmospheric carbon sink. Respiration (Rt) and fire are pathways that lead to carbon sources. Exports and long-term human use of forest products are flows that lead to carbon sinks

Answer 8

CARBON POOLS

Question 9

Carbon Pools in Forest Ecosystems (5)

Answer 9

1. above-ground biomass
2. necromass
3. Litter
4. Soil carbon
5. Roots

Question 10

Forests could contribute up to _____% of global GHG abatement

Answer 10

33%

Question 11

Forests could contribute up to 33% of

Answer 11

global GHG abatement

Question 12

850 M ha degraded forests worldwide with a potential for C sequestration of

Answer 12

117Gt CO2 by 2030 (equiv. to 5% of atmospheric CO2)

Question 13

ADAPTATION

Answer 13

adjustment in natural or human systems in response to actual or expected climatic stimuli or their effects, which moderates harm or exploits beneficial opportunities.

Question 14

adjustment in natural or human systems in response to actual or expected climatic stimuli or their effects, which moderates harm or exploits beneficial opportunities.

Answer 14

ADAPTATION

Question 15

MITIGATION

Answer 15

activities undertaken to reduce greenhouse gas emission in the atmosphere

Question 16

activities undertaken to reduce greenhouse gas emission in the atmosphere

Answer 16

MITIGATION