In the stratosphere, ozone is enriched with a maximal volume percent of 10‑5 (ozone layer) and absorbs UVA- and UVB-irradiance of the sun which, among other things, can cause cancer to human beings. The ozone layer especially is depleted by chlorofluorocarbons (CFC), which are produced as aerosol blowing agent or emerged from the use of solvents (e.g., carbon tetrachloride). The ozone depletion potential (ODP) of substances is regarded in relation to CCl3F (CFC 11), which potential is defined with 1. For the program EATOS, the ozone depletion potential of CF2BrCl (Halon 1211) (ODP = 4) was used for the assignment of a higher value Q.
The coordinates (Q = 1 / ODP = 0.01 (CFC 11-equivalent) and (Q = 9 / ODP = 4 (CFC 11-equivalent)) yield the exponential function ODP = 0.0047 × e0.7489×Q, which the weighting factor Q at a given ODP is calculated from as Q = ln[(ODP / 0.0047) / 0.7489)].
Table 14 Assignment of ozone depletion potentials (ODP) to the weighting factor QOzone depletion
Q |
|
ODP [CFC 11 := 1] |
|
||
1 |
0.00 |
to |
0.02 |
||
2 |
0.02 |
to |
0.04 |
||
3 |
0.04 |
to |
0.09 |
||
4 |
0.09 |
to |
0.20 |
||
5 |
0.20 |
to |
0.42 |
||
6 |
0.42 |
to |
0.89 |
||
7 |
0.89 |
to |
1.88 |
||
8 |
1.88 |
to |
3.97 |
||
9 |
3.97 |
to |
8.40 |
||
10 |
8.40 |
< |
|
||
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