Select another Impact Assessment Method
Back to EPS default 2000

Characterisation Method Information
Characterisation Method Name:
N2O impact on severe morbidity
Version:
1999
Date Completed:
1999
Principal Method Name:
EPS: global warming pathway and secondary NOx 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 (IPCC 1995).

The characterisation factor of CO2 for severe morbidity is determined to 3.53×10 –7 person-years/kg CO2. Therefore the characterisation factor of N2O for severe
morbidity is 320*3.53×E–07 = 1.13E–04 person-years /kg N2O.

Model 2, secondary NOx 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 severe morbidity is determined in "NOx impact on severe morbidity" to -2.06E-06 person-years/kg NOx. Therefore the characterisation factor of N2O for severe
morbidity is 1.35*(- 2.06E-06 ) = -2.78E–06 person-years /kg N2O.

Calculation of characterisation factor

The total characterisation factor is thus 1.13E–04 - 2.78E–06 = 1.10E–04 person-years /kg N2O.

Literature Reference:
IPPC, “The 1994 Report of the Scientific Assessment Working Group of IPCC. Summary for policymakers”, WMO and UNEP, 1994
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 severe morbidity
Characterisation Parameter Category Indicator Impact Indication Principle Aspect Substance Quantity Unit Notes
CFactor Severe morbidity EPS/2000
Type = Emission
Direction = Output
Media = Air
Geography = *
N2O 1.10E-04 p yr/kg 2 pathways