Characterisation Method Name: 
PM10 impact on morbidity 
Version: 
1999 
Date Completed: 
1999 
Principal Method Name: 
EPS: acute effects and global warming pathways 
Method Description: 
Model 1, acute effects The characterisation factor is determined by an empirical method. Category indicator value in system considered ExternE (1995) estimate the exposureresponse functions for ‘shortness in breath’ days for asthmatics to 0.14 per persondays per asthmatic per year per mg/m 3 . A rough estimation of the number of asthmatics in the world is that 10% of the OECD (Organisation for Economic Cooperation and Development) population of 1.2 billion is asthmatics and none outside OECD. This gives 0.1*1.2E+09 *0.14/365*30 = 1.38E+06 personyears of morbidity, where 30 mg/m 3 is the estimated average PM10 concentration in the OECD countries (see "PM10 impact on YOLL"). Contribution to category indicators value from a flow unit The same contribution apply as for model 1 in section "PM10 impact on YOLL", i.e. 2/3E11 per kg of PM10. Calculation of pathway specific characterisation factor 1.38E+06 *2/3E11 = 9.20E06 personyears/kg PM10. Model 2, global warming pathway The characterisation factor is determined by an equivalency method using CO2 as a reference. Equivalency factor The GWP for PM10 was determined to – 8.54 in section "PM10 impact on YOLL" Calculation of pathway specific characterisation factor The characterisation factor for CO2 with respect to morbidity was determined to 6.55E–07 personyears/kg CO2. Thus we obtain the characterisation factor for PM10 to –8.54*6.55E–07 =  5.59E06 personyears/ kg PM10. Calculation of characterisation factor The characterisation factor for both pathways is thus 9.20E06 – 5.59E06 = 3.61E06 personyears/ kg PM10. 
Literature Reference: 
1. ExternE, (1995) "Externalities of Energy" European Commission, DGXII, Vol 2, "Methodology", BrusselsLuxembourg, 1995. 2. IPPC, “The 1994 Report of the Scientific Assessment Working Group of IPCC. Summary for policymakers”, WMO and UNEP, 1994 
Methodological Range: 
For reasons mentioned in "PM10 impact on YOLL" global system borders are chosen. The time period investigated is the year 1990 
Notes: 
Characterisation Parameter  Category Indicator  Impact Indication Principle  Aspect  Substance  Quantity  Unit  Notes  
CFactor  Morbidity  EPS/2000 

PM10  3.61E06  p yr/kg  2 pathways 