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Characterisation Method Information
Characterisation Method Name:
Ethylene impact on morbidity
Version:
1999
Date Completed:
1999
Principal Method Name:
EPS: global warming pathway
Method Description:
Model

The characterisation factor is determined by an equivalency method using CO2 as a reference.

Equivalency factor

The GWP100 was estimated by IPCC (Intergovernmental Panel on Climate Change)to 11 in one of the early reports. (1990). Later this statement was withdrawn by IPCC, with the motivation that the uncertainty was too large. In the EPS context however, omitting it would create a larger error than including it, so the equivalency factor 11 will still be used.

Calculation of characterisation factor

The characterisation factor for CO2 is determined in "CO2 impact on morbidity" to 6.55E07 person-years/kg, which means that the characterisation factor of ethylene for morbidity is 11*6.5E07 = 7.21E06 person-years/kg.

Literature Reference:
Houghton, J.T Jenkins, G.J. and Ephraums, J.J., (Ed.) (1990) Climate change The IPCC scientific assessment. Cambridge University Press
Methodological Range:
Including emissions from anywhere at the globe 1990 and considering a residence time of several days for ethylene and its reaction products, the environmental system will also be global. As ethylene causes cancer, there is a reason for using a 20-year system border, but as we use a linear dose-response model, we restrict the system borders to the year 1990. For the global warming pathways, the same system borders as for CO2 is relevant, i.e. 100 years.
Notes:

Existing Characterisation Factors of Ethylene impact on morbidity
Characterisation Parameter Category Indicator Impact Indication Principle Aspect Substance Quantity Unit Notes
CFactor Morbidity EPS/2000
Type = Emission
Direction = Output
Media = Air
Geography = *
Ethylene 7.21E-06 p yr/kg Global warming