Alleviating the bias induced by the linear analysis update with an isopycnal ocean model

This work is based on the Norwegian Climate Prediction Model (NorCPM), which applies the ensemble Kalman filter (EnKF) to a fully coupled Earth System Model (NorESM) with an isopycnic ocean model (MICOM) for climate predictions. An idealized assimilation framework is first developed to identify the origin of assimilation‐created bias in the current version of NorCPM. It is found that the bias in ocean heat and salt contents is introduced by the...