|Characterisation Method Name:|
|Ethylene impact on NEX|
|Principal Method Name:|
|EPS: equivalency method modelling on global warming|
|NEX is Normalised EXtinction of species.|
The characterisation factor is determined by an equivalency method using CO2 as a reference.
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 Later this statement was withdrawn by IPCC, with the motivation that the uncertainty was too large.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 of CO2 for NEX is 1.26E–14 per kg CO2 "CO2 impact on NEX". Thus the characterisation factor of NEX is 11*(1.26E–14 ) = 1.39E–13 NEX per kg ethylene.
|Steen B (1999b): A systematic approach to environmental priority strategies in product development (EPS). Version 2000 – Models and data of the default method CPM report Chalmers University of Technology Sweden|
|The pathway modelled is via global warming. The same system borders as for CO2 is used i.e. 100 years.|
|Characterisation Parameter||Category Indicator||Impact Indication Principle||Aspect||Substance||Quantity||Unit||Notes|