It is assumed that about 50% of the light is photosynthetic active radiation (PAR) $`PAR = 0.5 \cdot I_{avg}`$
DINuptake is calculated from the maximum specific uptake rate [dsup>-1</sup>] at ambient temperature and the algal concentration. Limitations by light and nutrients are described by Monod formulations.
$`DIN_{upt}`$ is calculated from the maximum specific uptake rate [d<sup>-1</sup>] at ambient temperature and the algal concentration. Limitations by light and nutrients are described by Monod formulations.