Global seamless tidal simulation using a 3D unstructured-grid model (SCHISM v5.10.0)

Abstract. We present a new 3D unstructured-grid global ocean model to study both tidal and nontidal processes, with focus on the total water elevation. Unlike existing models, resolves estuaries rivers down ∼8 m without need for grid nesting. The is validated satellite in situ observations elevation, temperature, salinity. Tidal elevation solutions have mean complex root-mean-square error (RMSE) of 4.2 cm M2 5.4 all five major constituents deep ocean. RMSEs other four constituents, S2, N2, K1, O1, are, respectively, 2.05, 0.93, 2.08, 1.34 cm). residual assessed by tide gauge dataset (GESLA) has RMSE 7 cm. For first time ever, we demonstrate potential seamless simulation single mesh from into several along US West Coast. able accurately capture even at some upstream stations. can therefore potentially serve as backbone surge compound flooding forecasting framework.