ENVS 3010 Lecture Notes - Lecture 4: Ocean Current, Representative Concentration Pathways, Carbon Cycle

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Unit 4: Future Climate Projections
4.1: Emission Scenarios
- Why emission scenarios?
o
- Scenario models
o
- Main IPCC scenarios
o
Will government focus on economics or environmental issues
Will there be a global convergence of living or will there still be a division
between regions
o
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A1 is divided by the type of energy source that will be most used
- Scenario CO2 projection
o
- New IPCC approach
o
Sequential approach
Old approach
Cons
oIs time intensive
Parallel approach
New approach
Starts with representative concentrations
oThen run climate models while developing scenarios that would
lead to those concentrations
Pros
oThe climate model is the second step instead of the 3rd
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