Indonesia Conference Directory

A new ocean tide model for the Indonesian Sea has been estimated by assimilating TOPEX+JASON (27 years), ENVISAT (8 years), GFO-1 (8 years), and 100 coastal gauge stations (2-5 years) data into a barotropic hydrodynamic model. The new model consists of more than 25 tidal constituents, with a spatial resolution of about 2.5-. The respond method was employed to estimate the amplitudes and phases of about 280 tidal constituents. Only constituents whose amplitudes are larger than 1 cm are added to construct the new model. According to comparisons with another 40 coastal tide gauge stations and collinear residual reduction test, the new model provides a better performance compared to global ocean models, in particular around shallow waters and coastal areas. This advantage is due to the following reasons: (i) fine-scale along-track tidal analysis of multi-mission altimetry and coastal tide gauge data and (ii) optimal estimates of friction velocity and the decorrelation length in the hydodynamical equations.