3.17 Primary production

For primary producers the production is estimated as a function of the producers' biomass, Bi, from a simple saturating relationship

Eq. 67

where, r_i is the maximum production/biomass ratio that can be realized (for low B_i 's), and r_i/h_i is the maximum net primary production when the biomass is not limiting to production (high B_i 's). For parameterization it is only necessary to provide an estimate of r_i / (P_i/B_i), i.e., a factor expressing how much primary production can be increased compared to the base model state. If a Forcing function is applied to primary production (see Apply FF (primary producer)), it multiplies the r parameter in Eq. 67.