Hindcasting Surface Drift Trajectories in the St. Lawrence Estuary Using Operational Numerical Modeling vs. Measurements of Surface Currents From High-Frequency Radars
Our goal is to compare the hindcast skills of surface drift trajectories estimated using operational numerical modeling vs. measurements of surface currents from HFRs, against trajectory observations from surface drifters deployed in the Lower St. Lawrence Estuary (eastern Canada) in 2014 and 2015. The surface drifters were designed to be comparable to small debris floating at the ocean surface with a minimum windage. Four HFRs are combined to map hourly surface currents : two CODARs (Coastal Ocean Dynamics Applications Radars) on the south shore, and two WERAs (WavE RAdars) on the north shore of the estuary. The operational numerical modeling system includes a 5-km resolution coupled ice-ocean circulation model over the Gulf of St. Lawrence (GSL5km), and a regional spectral wave model (WAVEWATCH III).