A Conceptual model analysis of SST influence on marine biota in the South Java sea

The dynamics of ocean and atmosphere is a very complicated phenomenon. The complexity and nonlinearity of the ocean-atmosphere interaction for example, pose great difficulties for theoretician to explain in the simple models. Consequently, numerical model such as general ocean circulation model based on the supercomputer apparatus have been developed in recent decades. At the same times the development of theoretical nonlinear dynamical system and the progress of the intensive observation showed that quasi- periodic behavior of oceanic and atmospheric parameter. In the paper we used the same method of Heineman et al. (2011) to simulated biophysical coupling i.e. Sea Surface Temperature (SST) and biomass in the South Java Sea (SJC). It develops a simplified model of marine environment that is represented by a nonlinear delayed oscillator model and marine biota by NPZ model. The coupling between marine environment and marine biota is studied through the absorption of blue light by phytoplankton. The conceptual coupled atmosphere-ocean-ecosystem model for interaction between marine environment and marine biota in the South Java seas has been investigated. The environment is represented by delayed oscillator model and the marine biota is represented by NPZ model. SST gives a significant influence to the marine biota with the condition of kw= 0.2 m-1 and calculation of heat flux effect. Interaction between SST and marine biota is strongly affected by absorption coefficient kw. If we increase parameter of higher predation on Z (q) therefore the time series pattern of SST, nutrients, phytoplankton and zooplankton are not really periodic but quasi-periodic. The increasing of qZ2 term that represents carnivore predation of zooplankton will caused the chaotic behavior of the system. (EMS2022)