Global sensitivity analysis of a marine ecosystem dynamic model of the Sanggou Bay

A global sensitivity analysis (GSA) is performed on a marine ecosystem dynamic model by using Morris’ method with testing 10,000 times in this paper. This statistical sampling method allows to display nonlinear characteristics of interactions among various parameters and rank the most relevant parameters of the model. With this method, we proposed the modelʹs parameter optimization strategy and applied this to the Sanggou Bay. The results showed that the method not only can safeguard the objectivity of parameter set initial values, but also can avoid stochasticity of analytical results. Compared with the local one, the GSA is found to have a series of advantages, which supports necessity of developing it.