| In the marine ecosystem, the dynamic variety of the plankton not only impacts the biomass of fish and invertebrate population but global climatic change. The plankton has an important effect on the cycle of biogenetic elements. In reverse, large scale climatic change also has an important effect on global ecosystem. The main purpose of our paper is to use a one-dimensional vertically resolved marine ecosystem model to simulate the seasonal cycle of the plankton ecosystem's vertical distribution in the Coastal Waters of China. Based on the simulation, this paper analyzed the relation between each element, the influencing factors and mechanism of formation of the deep chlorophyll maxima, the mechanism of formation and controlling factors of spring bloom and autumn bloom. In order to enhance the thorough understanding on the plankton ecosystem in the Coastal Waters of China, the model is used to quantitative analysis the carbon cycle of the plankton ecosystem, and the influence of strong wind and photosynthetically active radiation (PAR) on the vertical distribution of plankton ecosystem.In this paper, the one-dimensional Modular Ecosystem Model (hereafter called MEM-1D) is used. It consists of two basic submodels: the physical submodel is the one-dimensional version of the Princeton Ocean Model (POM), while the biogeochemical submodel is taken from the European Regional Sea Ecosystem Model (ERSEM). According to characteristics of sea area, the vertically mixed coefficients Kh and Km are adjusted. The model includes some primary state variables such as phytoplankton (P), zooplankton (Z), bacteria (B), nutrient (N), include phosphate, nitrate, ammonium and silicate), particulate organic matter (POM), dissolved organic matter (DOM) and dissolved oxygen (DO). The atmospheric sedimentation and runoff are not taken into account.The data in 34°N, 124.5°E from marine picture book and climatic wind field data are adopted, and the model is used to simulate the seasonal cycle of the plankton...
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