Select another Impact Assessment Method
Back to EPS default 2000

Characterisation Method Information
Characterisation Method Name:
N2O impact on NEX
Version:
1999
Date Completed:
1999
Principal Method Name:
EPS: global warming pathway and NOx-transformation pathway
Method Description:
NEX is Normalised EXtinction of species.

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

The global warming potential for N2O on a 100 years basis is 320 (IPCC 1995).

The characterisation factor of CO2 for NEX is determined in "CO2 impact on NEX" to 1.26E14 /kg CO2. Therefore the characterisation factor of N2O for NEX is 320*1.26E14 = 4.03E12 /kg N2O.

Model 2, NOx-transformation pathway
The characterisation factor is determined by an equivalency method using NOx as a reference.

In "N2O impact on YOLL", the equivalency factor was determined to 1.35 kg NOx (NO2).

The characterisation factor of NOx for NEX is determined in "NOx impact on NEX" to 7.50E-14 per kg NOx. Therefore the characterisation factor of N2O for NEX is 1.35*7.50E-14 = 1.01E-13 /kg N2O.

Calculation of characterisation factor

The total characterisation factor is therefore estimated to 4.03E12 +1.01E-13 = 4.13E-12 /kg N2O.

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 impact is of global character. The modelled system is therefore global. The temporal system borders are 100 years (1990-2090). The society effected is the one described in IPCC scenario IS92A. (IPCC, 1990).
Notes:

Existing Characterisation Factors of N2O 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 = *
N2O 4.13E-12 NEX/kg 2 pathways