Numerical Model based on in situ Primary Production Data in Disposed Coastal Area

Based on in situ primary production data in Kashima-nada, parameters in the photosynthesis formula of the ecosystem model were changed. As a result, a coefficient of determination (R2) between the measurements and the calculation value improved in 0.86 from 0.51. We calculated with a new parameter and considered a characteristic of the spatial and temporal variation of primary productivity around Kashima-nada. Repeatability of the seasonal variation of concentration of phytoplankton and nutrients improved especially on the sea surface. It is necessary to correct grazing by the zooplankton and boundary condition of nutrients to give calculation accuracy more.