Abstract
We evaluate sensitivity and robustness of larval dispersal patterns to particle tracking parameters (the number of particles and the particle release depth) and to configurations of circulation model (horizontal resolution and output interval), using a triple-nested, high-resolution Seto Inland Sea (SIS) circulation model coupled with an offline Lagrangian particle tracking model. The optimal number of particles is evaluated 8,000 in inner bays while 12,000 near the mouth. Although the depth of initial particle displacement relevant to vertical migration of spawned larvae is less influential, refinement of lateral grid resolution in the circulation model is essential to realistic larval dispersal patterns due to better representation of complicated flow structures near coastlines and straits. Inclusion of transient tidal forcing is substantial to enhance the robustness, even as residual effects through the daily-averaged circulation field.
