Scenario-specific assumptions for emissions and their abatement were made for savanna burning, agricultural waste burning, landfills and wetland rice cultivation (see table below).
Abatement of emissions occurs in the B1 and B2 scenarios, where environmental values are more important than in the A1 and A2 scenarios. No abatement was assumed in A2 and B2. Abatement fractions with specific target years were assumed for B1 and B2. When higher economic growth is taken as the basis, abatement proceeds faster in B1 than in B2.
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Scenario assumptions for emissions from savanna burning, agricultural waste burning, landfilling and wetland rice
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Scenario/source
(gas species)
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Scenario assumption
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Savanna burning (CH4, CO, N2O, NOx, VOC, SO2) |
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A1
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No abatement |
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A2
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No abatement |
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B1
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Abatement of 0% in 2000, 40% in 2050, 60% in 2100, linear in between |
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B2
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Abatement of 0% in 2025, 40% in 2100, linear in between. |
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Agricultural waste burning (CH4, CO, N2O, NOx, VOC, SO2) |
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All scenarios
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The fraction of the crop residues burned each year for the OECD regions1 moves to the 1995 OECD Europe value in the target year in a linear fashion and remains constant afterwards.The fractions in the non-OECD regions2 move to the OECD Europe level of 1995 when their GDP reaches the OECD Europe level of 1995 according to a logarithmic function based on GDP. There is no change in regions where the fraction of agricultural residue burning is lower than for OECD Europe. |
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A1
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Target year 2025 |
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A2
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Target year 2050 |
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B1
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Target year 2050, plus additional abatement of 0 in 2000, 40% in 2050, 60% in 2100, linear in between |
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B2
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Target year 2050, plus additional abatement of 0 in 2025, 40% in 2100, linear in between. |
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Landfills (CH4) |
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All scenarios
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Emission factors (in kg CH4 cap-1 yr-1) in the OECD regions1 move to the 1995 OECD Europe value in the target year in a linear fashion and remain constant afterwards. The emission factors in the non-OECD regions2 move towards that of OECD Europe in 1995 when their GDP reaches the OECD Europe 1995 level according to a logarithmic function based on GDP.There is no change in regions where the emission factor is higher than for OECD Europe. |
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A1
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Target year 2025 |
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A2
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Target year 2050 |
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B1
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Target year 2050, plus additional abatement of 0 in 2000, 40% in 2050, 60% in 2100, linear in between |
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B2
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Target year 2050, plus additional abatement of 0 in 2025, 40% in 2100, linear in between. |
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Wetland rice fields (CH4) |
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All scenarios
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Emission factors (in kg CH4 m-2 yr-1) will move towards the 1995 USA value in 2020 |
1 OECD regions = USA, Canada, OECD Europe, Oceania and Japan
2 Non-OECD regions = Central America, South America, North Africa, Western Africa, Eastern Africa, Southern Africa, former USSR, Eastern Europe, Middle east, South Asia, East Asia, and Southeast Asia. |
