Difference between revisions of "CO2 Equivalent"

From Open Risk Manual
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== Definition ==
 
== Definition ==
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'''CO2 Equivalent'''. The amount of CO<sub>2</sub> that would cause the same integrated 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 carbon dioxide. It is used to evaluate different  reenhouse gases against a common basis.
+
'''CO2 Equivalent''' is the amount of CO<sub>2</sub> 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.  
 
Conversion factors vary based on the underlying assumptions and as the science advances.  
 +
 +
{| class="wikitable sortable"
 +
|-
 +
! 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 ==
 
== PCAF Recommendation ==
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<references/>
 
<references/>
  
−
[[Category:PCAF]]
+
[[Category:GHG Protocol]]

Revision as of 11:11, 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

  1. ↑ PCAF (2020). The Global GHG Accounting and Reporting Standard for the Financial Industry. First edition.
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