Characterisation Method Name: 
CFC11 impact on severe morbidity 
Version: 
1999 
Date Completed: 
1999 
Principal Method Name: 
EPS: stratospheric ozone depletion pathway and global warming pathway 
Method Description: 
Model 1, stratospheric ozone depletion pathway The characterisation factor is determined by the empirical method, but using the same basic information as in "CFC11 impact on YOLL". Category indicator value in system considered The mortality for skin cancer is estimated to 2%. The average duration of severe morbidity is assumed to be shorter than for other cancers. A oneyear duration per case is assumed. Thus, the category indicator value is 3500*1*1/0.02*100 = 17500000 personyears. Contribution to category indicators value from a flow unit According to IPCC business as usual estimate (including agreed emission reductions) the global emissions of freons in terms of CFC11 equivalents will be 2.5E+10 kg for the next 100 years. Therefore the contribution of 1 kg CFC11 (with respect to Ozone Depletion Potential) is 4E11 kg 1 . Calculation of pathway specific characterisation factor The pathway specific characterisation factor is thus 17500000*4E11 = 0.0007 personyears/ kg CFC11. Model 2, global warming pathway The characterisation factor is determined by an equivalency method using CO2 as a reference. Equivalency factor The GWP100 for CFC11 is 4000 (IPCC, 1994). Calculation of pathway specific characterisation factor The characterisation factor of CO2 for severe morbidity was determined to 3.53E07 personyears/kg CO2. Thus the global warming pathway specific characterisation factor of CFC11 for severe morbidity is 4000*3.53E–07 = 1.41E–03 personyears/kg CFC11. Calculation of characterisation factor The resulting characterisation factor from adding the two pathways is 0.0007 +1.41E–03 = 2.11E03 personyears/kg CFC11. 
Literature Reference: 
IPPC, “The 1994 Report of the Scientific Assessment Working Group of IPCC. Summary for policymakers”, WMO and UNEP, 1994 
Methodological Range: 
The system borders are the same as for "CFC11 impact on YOLL", i.e. global and 100 years. 
Notes: 
Characterisation Parameter  Category Indicator  Impact Indication Principle  Aspect  Substance  Quantity  Unit  Notes  
CFactor  Severe morbidity  EPS/2000 

CFC11  2.11E03  p yr/kg  2 pathways 