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चित्र:Climate change mitigation scenarios (IIASA). Global greenhouse gas emissions 2000-2100.png

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बिबरणClimate change mitigation scenarios (IIASA). Global greenhouse gas emissions 2000-2100.png
English: This graph shows projected changes in annual human greenhouse gas (GHG) emissions between the years 2000 and 2100 for a range of climate change mitigation scenarios. Emissions are measured in billion tonnes of carbon dioxide-equivalent (GtCO2-eq).

Projections for 5 scenarios are shown. Each scenario is designed to stabilize atmospheric GHG concentrations at a different level: 450, 520, 670, 970 and 1390 ppmv. A summary table of the graph data is given in a later section. In the scenarios, global emissions peak then decline. Emissions peak sooner in the century for the lower stabilization scenarios.

References

The full set of emissions data can be freely downloaded from:

These are the "A2r" mitigation scenarios. The global warming potentials used for the non-CO2 greenhouse gases are: 21 (CH4), 310 (N2O), 6500 (PFC), 23900 (SF6) and 1300 (HFC).
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Data

Decade when global emissions peak:

Scenario Peaking
decade
450 ppmv 2000
520 ppmv 2020
670 ppmv 2040
970 ppmv 2060
1390 ppmv 2080

Annual emissions (GtCO2-eq) 2000 to 2100:

Scenario Year
2000		 2030 2050 2100
450 ppmv 40.1 33.3 22.8 -8.9
520 ppmv 40.1 42.9 33.8 -2.5
670 ppmv 40.1 54.1 53.9 13.9
970 ppmv 40.1 64.7 79.2 54.3
1390 ppmv 40.1 68.1 90.5 115.9

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