|Characterisation Method Name:|
|NH3 impact on base cat-ion capacity|
|Principal Method Name:|
|EPS: equivalency method using SOx as a reference|
The characterisation factor is determined by an equivalency method using SOx as a reference.
The equivalency factor was determined in "NH3 impact on fish&meat" to 0.94.
Calculation of characterisation factor
For each kg of SO2 there is 1.56 equivalents of base cat-ions reserves depleted. ("SO2 impact on base cat-ion capacity")
The characterisation factor of NH3 for depletion of soil base cat-ions are therefore
0.94*1.56 = 1.47 equivalents/ kg NH3.
|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|
|The system is global and the time period is 1990. The system borders are wide enough to contain all of the modelled impact quantity (base cat-ion reserves). The response time for the modelled quantity is normally in the order of days to weeks. The area affected by a local emission is mainly within 1000 km.|
|Characterisation Parameter||Category Indicator||Impact Indication Principle||Aspect||Substance||Quantity||Unit||Notes|
|CFactor||Base cat-ion capacity||EPS/2000||
|NH3||1.47||H+ mole equivalence/kg|