Abstract
In the Makassar Strait, upwelling occurred by wind-driven current and complexity of bottom topography. Analysis of upwelling phenomena could be determined by salinity, temperature and three-dimensional current value which happened in a year as a climatology change. Regional Ocean Modelling System (ROMS) is a terrain-following three-dimensional model to calculate a numerical value which needs stability for long-duration simulation. The model has been simulated for 1 year from 1 January 2017 to 31 December 2017 and verified by tidal data. Horizontal Boundary Condition which contains u-v velocities, salinity and temperature, is a climatology data from GLBa0.08 HYCOM. Atmospheric forcing was calculated from ERA-INTERIM ECMWF. The verification uses RMSE and RRE methods and showed good result between model and observation data with RMSE=0.1454 meter and RRE=6.5806%. The result was analysed from twelve sampling points, six points on the outflow of the Makassar Strait which generated upwelling and the six others on the canal that connect to the Flores Sea and the Java Sea. The model gave a good result on January, and indicate average w-velocity of 9.1183 m/day.
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