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Global Warming Potentials
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Global Warming Potential referenced to the updated decay response for the Bern carbon cycle model and
future CO2 atmospheric concentrations held constant at current levels.
Source: Climate Change 1995, The Science of Climate Change: Summary for Policymakers and Technical Summary
of the Working Group I Report, page 22.
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Species
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Chemical formula
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Lifetime (years)
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Global Warming Potential (Time Horizon)
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20 years
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100 years
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500 years
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CO2
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CO2
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variable §
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1
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1
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1
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Methane *
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CH4
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12±3
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56
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21
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6.5
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Nitrous oxide
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N2O
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120
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280
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310
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170
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HFC-23
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CHF3
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264
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9100
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11700
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9800
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HFC-32
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CH2F2
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5.6
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2100
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650
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200
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HFC-41
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CH3F
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3.7
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490
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150
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45
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HFC-43-10mee
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C5H2F10
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17.1
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3000
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1300
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400
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HFC-125
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C2HF5
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32.6
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4600
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2800
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920
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HFC-134
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C2H2F4
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10.6
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2900
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1000
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310
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HFC-134a
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CH2FCF3
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14.6
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3400
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1300
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420
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HFC-152a
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C2H4F2
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1.5
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460
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140
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42
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HFC-143
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C2H3F3
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3.8
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1000
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300
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94
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HFC-143a
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C2H3F3
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48.3
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5000
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3800
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1400
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HFC-227ea
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C3HF7
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36.5
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4300
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2900
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950
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HFC-236fa
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C3H2F6
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209
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5100
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6300
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4700
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HFC-245ca
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C3H3F5
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6.6
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1800
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560
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170
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Sulphur hexafluoride
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SF6
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3200
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16300
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23900
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34900
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Perfluoromethane
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CF4
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50000
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4400
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6500
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10000
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Perfluoroethane
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C2F6
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10000
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6200
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9200
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14000
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Perfluoropropane
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C3F8
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2600
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4800
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7000
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10100
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Perfluorobutane
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C4F10
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2600
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4800
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7000
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10100
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Perfluorocyclobutane
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c-C4F8
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3200
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6000
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8700
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12700
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Perfluoropentane
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C5F12
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4100
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5100
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7500
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11000
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Perfluorohexane
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C6F14
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3200
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5000
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7400
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10700
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§ Derived from the Bern carbon cycle model.
* The GWP for methane includes indirect effects of tropospheric ozone production and stratospheric water
vapour production.
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