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Appendix 6
Global Warming Potential
values relative to carbon dioxide
Progressive global
warming threatens to alter climate and habitat conditions.
Global warming from gaseous releases may be calculated on the basis of their mass
emissions and global warming potential (GWP) relative to carbon dioxide. The factor
associated with the 100 year Integrated Time Horizon (References (1, 2, and 3) has been
used.
The potential impact on
global warming for a substance is tonne/year released to air, multiplied by its GWP. The
units are tonne/year carbon dioxide equivalent.
Substance |
GWP |
Ref. |
Carbon
dioxide |
1 |
|
Chlorodifluoromethane,
R22 |
1,700 |
2 |
Chloropentafluoroethane,
Rl15 |
9,300 |
2 |
Dichlorodifluoromethane,
R 12 |
8,500 |
2 |
Dichlorotetrafluoroethane,
R114 |
9,300 |
2 |
Difluoroethane |
140 |
3 |
Hexafluoroethane |
9,200 |
3 |
Methane |
21 |
3 |
Nitrous
oxide |
310 |
3 |
Pentafluoroethane,
R125 |
2,800 |
3 |
Perfluoromethane |
6,500 |
3 |
Tetrafluoroethane,
R134a |
1,300 |
3 |
Trichloroethane
(1,1,1) |
110 |
2 |
Trichlorofluoromethane,
R 11 |
4,000 |
2 |
Trichlorotrifluoroethane,
R 113 |
5,000 |
2 |
Trifluoroethane,
R143a |
3,800 |
3 |
Trifluoromethane,
R23 |
11,700 |
3 |
_________________________
- Climate Change; The IPCC
(Intergovernmental Panel on Climate Change) scientific assessment, The University Press,
Cambridge, UK (1990).
- Climate Change 1994; Radiative forcing of
climate change. IPCC, The University Press, Cambridge, UK (1995).
- Climate Change 1995; The science of
climate change. Contribution of WGI to the second assessment report of IPCC, The
University Press, Cambridge, UK (1996).
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