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Characterisation Method Information
Characterisation Method Name:
N2O impact on crop
Version:
1999
Date Completed:
1999
Principal Method Name:
EPS: global warming pathway and NOx-tranformation pathway
Method Description:
Model 1, global warming pathway

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 (ICCP 1995).

The characterisation factor of CO2 for crop loss is determined in "CO2 impact on crop" to 7.56E04 kg crop/kg CO2. Therefore the characterisation factor of N2O for crop is 320*7.56E04 = 2.42E01 kg crop/kg N2O.

Model 2, NOx-tranformation 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 crop is determined in "NOx impact on crop" to 7.00E-01 kg crop per kg NOx. Therefore the characterisation factor of N2O for morbidity is 1.35*7.00E-01 = -0.944 kg crop/kg N2O.

Calculation of characterisation factor

The total characterisation factor is thus 2.42E01 + 0.944 = 1.19kg crop/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 crop
Characterisation Parameter Category Indicator Impact Indication Principle Aspect Substance Quantity Unit Notes
CFactor Crop EPS/2000
Type = Emission
Direction = Output
Media = Air
Geography = *
N2O 1.19 kg/kg 2 pathways