Model Details

CCCMA CGCM 3.1

Canadian Centre for Climate Modeling and Analysis – General Circulation Model version 3.1 - t47

MPI ECHAM 5

Max Planck Institute for Meteorology – European Centre Hamburg Model 5

GFDL CM 2.1

Geophysical Fluid Dynamics Laboratory – Coupled Climate Model 2.1

UKMO HADCM 3.0

UK Met Office - Hadley Centre – Coupled Model 3.0

MIROC 3.2

Center for Climate System Research – Model for Interdisciplinary Research on Climate (medium resolution)

5 Model Average

A composite of the five models listed above

Emission Scenario Details (from SNAP)

Scenario A1B

• Rapid economic growth
• A global population that reaches 9 billion in 2050 and then gradually declines
• The quick spread of new and efficient technologies
• A convergent world - income and way of life converge between regions
• Extensive social and cultural interactions worldwide
• A balanced emphasis on all energy sources

Scenario B1

• Rapid economic growth as in A1B, but with rapid changes towards a service and information economy
• Population rising to 9 billion in 2050 and then declining as in A1
• Reductions in material intensity and the introduction of clean and resource efficient technologies
• An emphasis on global solutions to economic, social and environmental stability

Scenario A2

• A world of independently operating, self-reliant nations
• Continuously increasing population
• Regionally oriented economic development
• Slower and more fragmented technological changes and improvements to per capita income

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