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Update Biological Processes authored by Wijsman, Jeroen's avatar Wijsman, Jeroen
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NPZ-model/Biological-Processes.md
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# DINuptake
DINuptake is the production of phytoplankton (primary production) [mmol-N m<sup>-3</sup> d<sup>-1</sup>] and is depending on the underwater-light conditions, water temperature, the nutrient concentration (DIN) and the phytoplankton concentration.
DINuptake is the production of phytoplankton (primary production) [mmol-N m<sup>-3</sup> d<sup>-1</sup>] and is depending on the underwater-light conditions (PAR), water temperature, the nutrient concentration (DIN) and the phytoplankton concentration.
Mean daily irradiation at the water surface ($`I_{0}`$) [W d<sup>-1</sup>] is derived from the file KNMI measurements (stored in “./DataOS/KNMI/”). The underwater-light conditions are calculated from the daily irradiation at the water surface and the extinction coefficient ($`k_{d}`$):
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