Global Warming Potentials

 Compiled by Rolando Delgado Castillo and Rafaela Pérez Marchena

 

      Versión en Espańol                                                                 English version  

 

Global Warming Potentials

Designation

Chemical Formula

20 years

100 years

500 years

CFC-11

CFCl3

5000

4000

1400

CFC-12

CF2Cl2

7900

8500

4200

CFC-13

CClF3

 8100

11700

13600

CFC-113

C2F3Cl3

5000

5000

2300

CFC-114

C2F4Cl2

6900

9300

8300

CFC-115

C2F5Cl

6200

9300

13000

H-1305

CBrF3

6200

5600

2200

HCFC-22

CF2HCl

4300

1700

520

HCFC-141b

C2FH3Cl2

1800

630

200

HCFC-142b

C2F2H3Cl

4200

2000

630

HCFC-123

C2F3HCl2

300

93

29

HCFC-124

C2F4HCl

1500

480

150

HCFC-225ca

C3F5HCl2

550

170

52

HCFC-225cb

C3F5HCl2

1700

530

170

Carbon tetrachloride

CCl4

2000

1400

500

Methyl chloroform

CH3CCl3

360

110

35

Source: Scientific Assessment of Ozone Depletion (1994):  Chapter 13, "Ozone Depleting Potentials, Global Warming Potentials and Future Chlorine/Bromine Loading". UNEP, February 1995.

 

Global Warming Potentials for CFCs

Chemical Name Lifetime,
in years

GWP1

(WMO 2002)

GWP2 (SAR)

GWP3

(TAR)

GWP4

(40 CFR)

CFC-11 (CCl3F)
Trichlorofluoromethane
45 4680 3800 4600 4000
CFC-12 (CCl2F2)
Dichlorodifluoromethane
100 10720 8100 10600 8500
CFC-13 (CF3Cl)
Chlorotrifluoromethane
640 14190   14000 11700
CFC-113 (C2F3Cl3)
1,1,2-Trichlorotrifluoroethane
85 6030 4800 6000 5000
CFC-114 (C2F4Cl2)
1,2-Dichloro-tetrafluoroethane
300 9880   9800 9300
CFC-115 (C2F5Cl)
Monochloropentafluoroethane
1700 7250   7200 9300
 

Source: US Environmental Protection Agency  Class I Ozone-Depleting Substances

 

All GWP values represent global warming potential over a 100-year time horizon.

The numbers in the “GWP-1” column are from Table 1-6 of The Scientific Assessment of Ozone Depletion, 2002, a report of the World Meteorological Association’s Global Ozone Research and Monitoring Project. The GWPs in the “GWP-1” column that were not provided Table 1-6 of the 2002 report have not been updated since 1998 and are from The Scientific Assessment of Ozone Depletion, 1998.

“GWP-2” column numbers are from the Intergovernmental Panel on Climate Change (IPCC) Second Assessment Report: Climate Change 1995,

“GWP-3” column numbers are from the IPCC Third Assessment Report: Climate Change 2001, 

“GWP-4” column numbers are from 40 CFR Part 82, stratospheric ozone protection regulations required by title VI of the Clean Air Act amendments.

 

Global Warming Potentials for HCFCs

Chemical Name Lifetime,
in years

GWP1

(WMO 2002)

GWP2

(SAR)

GWP3       (TAR)

GWP4

(40 CFR)

HCFC-21 (CHFCl2)
Dichlorofluoromethane
1.7 148   210  
HCFC-22 (CHF2Cl)
Monochlorodifluoromethane
12.0 1780 1500 1700 1700
 
HCFC-123 (C2HF3Cl2)
Dichlorotrifluoroethane
1.3 76 90 120 93
HCFC-124 (C2HF4Cl)
1-chloro-1,2,2,2-tetrafluoroethane*
5.8 599 470 620 480
HCFC-141b (C2H3FCl2)
1,1-dichloro-1-fluoroethane
9.3 713   700 630
HCFC-142b (C2H3F2Cl)
1-chloro-1,1-difluoroethane*
17.9 2270 1800 2400 2000
 
HCFC-225ca (C3HF5Cl2)
1,1-dichloro-2,2,3,3,3-pentafluoropropane*
1.9 120   180 170
HCFC-225cb (C3HF5Cl2)
1,3-dichloro-1,2,2,3,3-pentafluoropropane*
5.8 586   620 530
* These names were given following the IUPAC rules and numbering scheme for propane-derived by compiler, Rolando Delgado.
Source: US Environmental Protection Agency Class II Ozone-Depleting Substances

 

Comparison of 100-Year GWP Estimates

from the IPCC's Second (1996) and Third (2001) Assessment Reports for HFCs

Gas 1996 IPCC GWPa 2001 IPCC GWPb
    HFC-23 (CHF3) 11,700 12,000
    HFC-125 (CF2HCF3) 2,800 3,400
    HFC-134a (CF3CFH2) 1,300 1,300
    HFC-143a  (CF3-СН3) 3,800 4,300
    HFC-152a (CH3CHF2) 140 120
    HFC-227ea (CF3CHFCF3) 2,900 3,500
    HFC-236fa (CF3CH2CF3) 6,300 9,400
    Perfluoromethane (CF4) 6,500 5,700
    Perfluoroethane (C2F6) 9,200 11,900
    Sulfur Hexafluoride (SF6) 23,900 22,200
Source: IPCC Global Warming Potential page

 

Comparison of 100-Year GWP Estimates from the IPCC's Second (1996)

 and Third (2001) Assessment Reports for Greenhouse Gases

Gas 1996 IPCC GWPa 2001 IPCC GWPb
    Carbon Dioxide 1 1
    Methane 21 23
    Nitrous Oxide 310 296

 

Global Warming Potentials for Halons
Chemical Name Lifetime,
in years

GWP1

(WMO 2002)

GWP2 (SAR)

GWP3

(TAR)

GWP4

(40 CFR)

Halon 1211 (CF2ClBr)
Bromochlorodifluoromethane
16 1860   1300  
Halon 1301 (CF3Br)
Bromotrifluoromethane
65 7030   6900  
Halon 2402 (C2F4Br2)
Dibromotetrafluoroethane
20 1620      
 
CCl4
Carbon tetrachloride
26 1380 1400 1800 1400
 
Global Warming Potentials for related substances
Methyl Chloroform (C2H3Cl3)
1,1,1-trichloroethane
5.0 144   140 110
 
Methyl Bromide (CH3Br) 0.7 5   5  
  
CH2BrCl
Chlorobromomethane
0.37        

Source: US Environmental Protection Agency  Class I Ozone-Depleting Substances

INDEX