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Characterisation Method Information
Characterisation Method Name:
Formaldehyde impact on NEX
Version:
1999
Date Completed:
1999
Principal Method Name:
EPS: global warming pathway
Method Description:
NEX is Normalised EXtinction of species.

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 Later this statement was withdrawn by IPCC, with the motivation that the uncertainty was too large.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 of CO2 for NEX is 1.26E14 per kg CO2 . Thus the characterisation factor of NEX is 11*(1.26E14 ) = 1.39E-13 NEX per kg formaldehyde.


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:
The pathway modelled is via global warming. The same system borders as for CO2 is used i.e 100 years.
Notes:

Existing Characterisation Factors of Formaldehyde impact on NEX
Characterisation Parameter Category Indicator Impact Indication Principle Aspect Substance Quantity Unit Notes
CFactor NEX EPS/2000
Type = Emission
Direction = Output
Media = Air
Geography = *
Formaldehyde 1.39E-13 NEX/kg Global warming