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Upper Atmosphere
basics
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1. Dynamics & Aviation
2. Ozone
- Strat. Ozone
- Chlorine chemistry
- CFC & HCFC
- The big misunderstanding
- Cooling
* Worksheet 1
* Worksheet 2
     
 

Higher Atmosphere

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Chlorofluorocarbons

An overview of the lifetimes and global warming potentials (GWP) of halogenated compounds compared to carbon dioxide (CO2).

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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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last updated 11.05.2004 18:43:47 | © ESPERE-ENC 2003 - 2013