Difference between revisions of "CO2 Equivalent"
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Revision as of 11:12, 30 October 2021
Definition
CO2 Equivalent is the amount of CO2 that would cause the same integrated wikipedia:radiative forcing (a measure for the strength of Climate Change drivers) over a given time horizon as an emitted amount of another GHG or mixture of GHGs.
It is the universal unit of measurement to indicate the Global Warming Potential (GWP) of each greenhouse gas, expressed in terms of the GWP of one unit of wikipedia:Carbon Dioxide. It is used to evaluate different reenhouse gases against a common basis.
Conversion factors vary based on the underlying assumptions and as the science advances.
Formula | Name | 5AR | 4AR | 3AR 2 | AR |
---|---|---|---|---|---|
CO2 | Carbon Dioxide | 1 | 1 | 1 | 1 |
CH4 | Methane | 28 | 25 | 23 | 21 |
N2O | Nitrous Oxide | 265 | 298 | 296 | 310 |
SF6 | Sulphur hexafluoride | 23.500 | 22.800 | 22.200 | 23.900 |
CF4 | Carbon tetrafluoride | 6.630 | 7.390 | 5.700 | 6.500 |
C2F6 | Hexafluoroethane | 11.100 | 12.200 | 11.900 | 9.200 |
CHF3 | HFC-23 | 12.400 | 14.800 | 12.000 | 11.700 |
CH2F2 | HFC-32 | 677 | 675 | 550 | 650 |
CH3F | HFC-41 | 116 | 92 | 97 | 150 |
C2HF5 | HFC-125 | 3.170 | 3.500 | 3.400 | 2.800 |
C2H2F4 | HFC-134 | 1.120 | 1.100 | 1.100 | 1.000 |
CH2FCF3 | HFC-134a | 1.300 | 1.430 | 1.300 | 1.300 |
C2H3F3 | HFC-143 | 328 | 353 | 330 | 300 |
C2H4F3 | HFC-143a | 4.800 | 4.470 | 4.300 | 3.800 |
C2H4F2 | HFC-152a | 138 | 124 | 120 | 140 |
C3HF7 | HFC-227ea | 3.350 | 3.220 | 3.500 | 2.900 |
C3H2F6 | HFC-236fa | 8.060 | 9.810 | 9.400 | 6.300 |
C3H3F5 | HFC-245ca | 716 | 1.030 | 950 | 560 |
NF3 | Nitrogen trifluoride | 16.100 | 17.200 |
PCAF Recommendation
- As a baseline, PCAF recommends using 100-year Global Warming Potentials without climate-carbon feedback from the most recent IPCC Assessment report. As defined in[1]
References
- ↑ PCAF (2020). The Global GHG Accounting and Reporting Standard for the Financial Industry. First edition.