This is a model used in the past

The Global Ocean Circulation model NEMO is currently used together with two multivaried assimilation schemes, Optimal Interpolation (OI) and variational, which are able to assimilate more types of observations and correct several physical variables.

Both systems are based on a technique of reduction of the dimension of the problem that uses a set of multivaried vertical EOFs where the state vector of the model is projected.

The following CMCC Research Paper contains the guide that describes the system of assimilation based on the OI and explains how to use it.

Research Papers