Extreme Wave Analysis Based on 31 Years Data from WW3 Model: Study off Southern Brazilian Coast

A long-term wave hindcast (1979-2009) based on the NCEP/NCAR Reanalysis and WAVEWATCH III has been assessed using 29 months of measurements over Rio Grande shelf, South Brazil to evaluate skills biases in for this region. Extreme events were selected by Peaks Over Thresholds (POT) fitted a Generalized Pareto Distribution (GPD) estimate extreme significant height from 31 years simulation. The heights hinhindcast measurement show generally good aagreement although tended be underestimated hindcast. This underestimation was more pronounced events. estimated waves, hindcast, with 50 100 return period offshore deep water feature large waves 10.54 11.18 meters, respectively. information presented here can useful those involved coastal management disaster response also navigation operations.