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The ocean is increasingly seen as a vital component of the climate system. Through the surface of the ocean, exchanges with the atmosphere of heat, water, gases, particles occur. Extratropical cyclones (EC) transfer momentum into the superficial layers of the ocean due to the friction of the wind, in addition they distribute heat and humidity from low to high latitudes. These systems are centered in the ocean-atmosphere interaction and climate in South America. In the Southern Hemisphere, the area between southern Brazil and the Antarctic Peninsula (AP) (30 ° S to 70 ° S) is described as one of the most favorable for the formation of cyclones because of the existence of strong temperature gradients between the ocean and the above surface air layer and also pre-existing baroclinic instabilities. This study is associated with the ATMOS Project (AnTarctic Modeling Observation System) and aimed to understand the interaction of cyclones and the ocean in the region between the high and medium latitudes. The goal was to track the trajectories of the EC that formed around the AP, in spring months, in order to study the statistical properties and check for possible influences at lower latitudes. The algorithm found some anomalous trajectories and little correlation between vorticity and oceanic variables. This could be an indicative of the need for non-linear statistical techniques.

Estudo das trajetórias de ciclones extratropicais formados na região da Península Antártica durante a primavera