Applying ocean data assimilation and forecast skill test for regional ocean circulation model in East Japan/Sea

Abstract

We applied 3-dimentional variational data assimilation technique (3D-Var) to the MOM3-based regional ocean model in the East/Japan Sea. Reanalyzed 100m temperature field by the 3D-Var fairly well corresponds with the measured one by the PIES (Pressure-gauge-equipped Inverted Echo Sounder) (Kim et al., 2009). Correlation between hindcasted temperature from the initial of reanalysis and measure one is presented as a skill of forecast. Consequently, the forecast skill of the MOM3-based regional ocean model with 3D-Var persists high within 2 months as the correlation is higher than 0.6.