Global Warming Potentials

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.

Species

Chemical formula

Lifetime (years)

Global Warming Potential (Time Horizon)

 

 

 

20 years

100 years

500 years

Carbon dioxide

CO2

variable §

1

1

1

Methane *

CH4

12±3

56

21

6.5

Nitrous oxide

N2O

120

280

310

170

 

 

 

 

 

 

HFC-23

CHF3

264

9100

11700

9800

HFC-32

CH2F2

5.6

2100

650

200

HFC-41

CH3F

3.7

490

150

45

HFC-43-10mee

C5H2F10

17.1

3000

1300

400

HFC-125

C2HF5

32.6

4600

2800

920

HFC-134

C2H2F4

10.6

2900

1000

310

HFC-134a

CH2FCF3

14.6

3400

1300

420

HFC-152a

C2H4F2

1.5

460

140

42

HFC-143

C2H3F3

3.8

1000

300

94

HFC-143a

C2H3F3

48.3

5000

3800

1400

HFC-227ea

C3HF7

36.5

4300

2900

950

HFC-236fa

C3H2F6

209

5100

6300

4700

HFC-245ca

C3H3F5

6.6

1800

560

170

Sulphur hexafluoride

SF6

3200

16300

23900

34900

Perfluoromethane

CF4

50000

4400

6500

10000

Perfluoroethane

C2F6

10000

6200

9200

14000

Perfluoropropane

C3F8

2600

4800

7000

10100

Perfluorobutane

C4F10

2600

4800

7000

10100

Perfluorocyclobutane

c-C4F8

3200

6000

8700

12700

Perfluoropentane

C5F12

4100

5100

7500

11000

Perfluorohexane

C6F14

3200

5000

7400

10700

§ Derived from the Bern carbon cycle model.

* The GWP for methane includes indirect effects of tropospheric ozone production and stratospheric water vapour production.