Summary: | We use the Ensemble Kalman Filter (EnKF) to assimilate either sea-ice concentration or sea-ice thickness data into the coupled ocean sea-ice models NEMO-LIM2 and - LIM3. Output from our data assimilation system is intended to be used to initialize decadal forecasts within the EU-project COMBINE. For now assimilated data is model generated (twin experiments). We find that assimilation of data of one variable in NEMO-LIM2 does not only improve the assimilated variable but also non-assimilated variables. Such crossvariable improvement is very promising considering the scarcity of polar data, particularly of sea-ice thickness. We also show preliminary results of data assimilation experiments into the new version of our sea-ice model, NEMO-LIM3, where data assimilation does not yet lead to the expected results
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