Sistema de previsão de ondas oceânicas no litoral sul do Brasil e águas adjacentes do Oceano Atlântico Sul

Abstract

This work aims to developed a wave prediction system for the deep waters of the South Atlantic Ocean and shallow waters off the coast of Rio Grande do Sul through the coupling between the GFS model and two ocean wave models (WW3 and SWAN). In the first stage of the work was made a synoptic analysis of the wind conditions that generate intense waves in the sea adjacent to the south coast of Brazil. It was analyze the possible errors introduced to the wave models by the GFS from the wind records of the buoys. The wave field was simulated in the South Atlantic Ocean and the coast of Rio Grande with the WW3 and SWAN models respectively. The outputs of the wave models were evaluated with the registers of waveforms and buoys of the area. The simulated period corresponds to the passage of a cold front and strong pressure gradients between a high and low pressure system, this generates intense waves between days 22-28 march 2016. WW3 had better in intense waves situations and near the generation area, while SWAN was better in the weak wave forecast and away from the generation area.