δ30Si is used as a proxy for reconstruction of marine silicic acid utilization and Si cycling both at present and in the geological past. A better understanding of modern δ30Si distribution and its control mechanism is imperative for applying this proxy with confidence. It has been a decade since the first modeling of the global marine δ30Si distribution was accomplished [Wischmeyer et al., 2003]. Given the growing body of field data collected since then, an up-to-date model-data comparison is feasible and desired. Here we present a global model for investigating δ30Si, which is based on Wischmeyer et al. [2003]'s work, aimed at representing a more realistic global pattern of oceanic and sedimentary δ30Si distributions and revealing possible controlling mechanisms. Reference Wischmeyer, A. G., C. L. De La Rocha, E. Maier-Reimer, and D. A.Wolf-Gladrow (2003), Control mechanisms for the oceanic distribution of silicon isotopes, Global Biogeochemical Cycles, 17 (3), 1083.