Diferenças entre as evoluções temporais dos ENOS plurianuais e de único ano: Impactos na precipitação da América do Sul tropica

Abstract

The present work seeks to characterize and point out the differences in the patterns of evolution el Niño-Southern Oscillation (ENOS) events lasting a single year, defined as annual, and long-term, as multi-annual, through the analysis of the Temperature of Surface of the Sea, as well as verify the influence of such events on precipitation in the Tropical South America. To this, two contrasting events, in terms of the duration of event, both for the positive phase of ENOS (El Niño) and for the negative phase (La Niña), were selected for case studies. Separate analysis of each of the events suggested that ENOS events have different characteristics in relation to intensity and persistence of anomalies when comparatoring the first and second year of Events. In addition, changes in the atmospheric patterns of tropical teleconnections during the the first and second year of the events impact differently on the precipitation of America Tropical South.