Higher Atmosphere

Direct Global Warming Potentials (mass basis) relative to carbon dioxide (for gases for which the lifetimes have been adequately characterised).
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Gas

Lifetime (years)

Ozone
depletion
potential
(ODP)

Global Warming Potential

Time horizon

20 years

100 years

Carbon dioxide

CO₂

1

1

Methane

CH₄

12.0*

62

23

Nitrous oxide

N₂O

114*

275

296

Chlorofluorocarbons

CFC-11

CCl₃F

45

1.0

6300

4600

CFC-12

CCl₂F₂

100

0.82

10200

10600

CFC-13

CClF₃

640 (c)

10000

14000

CFC-113

CCl₂FCClF₂

85

0.90

6100

6000

CFC-114

CClF₂CClF₂

300

0.85

7500

9800

CFC-115

CF₃CClF₂

1700

1.20

4900

7200

Hydrochlorofluorocarbons

HCFC-21

CHCl₂F

2.0

700

210

HCFC-22

CHClF₂

11.9

0.04

4800

1700

HCFC-123

CF₃CHCl₂

1.4

0.014

390

120

HCFC-124

CF₃CHClF

6.1

0.03

2000

620

HCFC-141b

CH₃CCl₂F

9.3

0.10

2100

700

HCFC-142b

CH₃CClF₂

19

0.05

5200

2400

Hydrofluorocarbons

HFC-23

CHF₃

260

<0.0004

9400

12000

HFC-32

CH₂F₂

5.0

1800

550

HFC-41

CH₃F

2.6

330

97

HFC-125

CHF₂CF₃

29

<0.00003

5900

3400

HFC-134

CHF₂CHF₂

9.6

3200

1100

HFC-134a

CH₂FCF₃

13.8

<0.000015

3300

1300

HFC-143

CHF₂CH₂F

3.4

1100

330

HFC-143a

CF₃CH₃

52

5500

4300

Chlorocarbons

CH₃CCl₃

4.8

450

140

CCl₄

35

2700

1800

CHCl₃

0.51

100

30

CH₃Cl

1.3

0.02

55

16

CH₂Cl₂

0.46

35

10

Bromocarbons

CH₃Br

0.7

0.64

16

5

CH₂Br₂

0.41

5

1

CHBrF₂

7.0

1500

470

Halon-1211

CBrClF₂

11

3600

1300

Halon-1301

CBrF₃

65

7900

6900

Fully fluorinated species

SF₆

3200

15100

22200

CF₄

50000

3900

5700

* The values for CH₄ and N₂O are adjustment times including feedbacks of emission on lifetimes.

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