A Simple Bias Correction Scheme in Ocean Data Assimilation

The mode bias is present and time-dependent due to imperfect configurations. Data assimilation the process by which observations are used correct model forecast, affected bias. How reduce an important issue. This paper investigates roles of a simple correction scheme in ocean data assimilation. In this scheme, misfits between modeled monthly temperature salinity with interannual variability from Met Office Hadley Centre subsurface set (EN4.2.2) for innovations via Ensemble Optimal Interpolation method. Two experiments implemented evaluate impacts correction. first experiment system without second experiment, applied For comparison, nature run no also conducted. When not applied, alone leads rising trend heat salt content that found observations. It spurious temporal effect on Meanwhile, produces significant negative salinity. performs best notable improvements over results other two experiments.