Hourly Lagrangian residual currents from OMA in EuskOOS

This product of the Basque Operational Oceanography System (EuskOOS) consists on fields of the Lagrangian residual currents (LRCs) obtained from the gap-filling of HF radars data using the OMA methodology. To obtain the LRCs, the Lagrangian trajectories for particles evenly located in the HF radar grid are computed over 3 days. The initial and final positions of each particle are used to compute a Lagrangian residual vector (we call this “residual” because the contribution of the tidal component is filtered out by the time integration used) at the center of mass of its trajectory and then this Lagrangian vectors are re-interpolated to a regular grid. The LRC provide an estimation of the integrated transport due to the last 3-days total currents observed by the radar. This L4 data product can be delivered as a vector field or as a graphic map (of current vectors and streamlines).