Methane from SWDS. New Norwegian calculating model. Per Svardal. 2004 revision of model from 1999. Many reasons. For reasons and results see www.sft.no/publikasjoner/luft/2079/2079.pdf Two of the reasons were: Complicated model, difficult, poor view of calculations (black box).
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New Norwegian calculating model
Rate of reaction equation, reactant transforming to methane:
dDDOC =DDOC * k * e^-kt *dt
Integrated equation for mass calculations, year t:
DDOCdiss = DDOC * (e^-k(t-1) – e^-kt)
(DDOC = dissimilable organic carbon)
Two main equations:
DDOCdiss = (DDOCd+DDOCly) * (1-e^-k)
DDOCly = (DDOCd+DDOCly) * e^-k