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Characterisation Method Information
Characterisation Method Name:
NH3 impact on crop
Version:
1999
Date Completed:
1999
Principal Method Name:
EPS: secondary aerosol pathway
Method Description:
Model for secondary aerosol pathway

The characterisation factor is determined by an equivalency method using PM10 as a reference.

Equivalency factor

The same equivalency factor is used as in "NH3 impact on severe morbidity", i.e. 2.00 kg ‘effective’ PM10/kg NH3.

Calculation of characterisation factor

According to "PM10 impact on crop" there are -6.46E-03 kg crop lost per kg PM10. This will give –2.00 *6.46E-03 = -1.29E-02 kg crop lost per kg NH3.
Literature Reference:
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
Methodological Range:
The system is global and the time period is 1990.
Notes:

Existing Characterisation Factors of NH3 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 = *
NH3 -1.29E-02 kg/kg secondary aerosol pathway