|Characterisation Method Name:|
|P-tot impact on NEX|
|Principal Method Name:|
|EPS: eutrofication pathway|
|NEX is Normalised EXtinction of species.|
The characterisation factor is determined by the empirical method.
Category indicator value in system considered
10% of the threat to bio-diversity in Scandinavia are due to eutrofication. On a global scale, the threat to bio-diversity is assumed to be less, 1%. The indicator value is thus 0.01NEX.
Contribution to category indicators value from a flow unit
Global emission of phosphorous to water is estimated to be in the order of 2E+9 kg, but
is only contributing to a minor degree to eutrofication effects (10%, in lakes)
Calculation of characterisation factor
0.01/2×10 9 *0.1 = 5E-13 NEX/kg P-tot.
|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|
|All lakes, surface waters and oceans on the globe 1990, but with a focus on lakes and surface waters, where phosphorus often is growth rate limiting.|
|Characterisation Parameter||Category Indicator||Impact Indication Principle||Aspect||Substance||Quantity||Unit||Notes|