Cyclones density and characteristics in different reanalyses dataset over South America

Cyclones developing over and at the eastern coast of South America impact extreme events over the region. Understanding the present climate is crucial to assess future extremes tendencies, which are important for engineering constructions over the southeast Brazil basin. To evaluate these systems in climate change scenarios it is important to study their preferred region of formation and trajectories in the present climate. Therefore, in this study we tracked cyclones in a period from 1979 to 2018 (present climate) using different reanalyses dataset (CFSR, ERA-Interim and ERA5), pointing out the main cyclogenetic regions affecting South America and discussing the main differences between the different dataset. As a preliminary result, the cyclone tracking shows a higher number of systems in CFSR than in ERA-Interim, which would be explained by the finer resolution of CFSR.  Annually, this difference is about 6%, and seasonally, the difference is smaller in summer (3.5%) and similar (~7%) for the other seasons. The reanalyses identify basically the same four cyclogenetic regions, however, there are differences in the density center position. Other features as lifetime, intensity, traveled distance, and wind extremes associated with the cyclones will be also discussed.