ANALYSIS AND IDENTIFICATION OF EXTREME RAINFALL EVENTS ON THE ISLAND OF MARAJÓ/PARÁ

Rainfall is considered to be one of the most important climatic variables investigated in the Amazon, given that forest ecosystems play a role in the hydrological cycle and regional rainfall distribution. The aim of this article is to present the annual variability in extreme rainfall years on the island of Marajo, identifying extreme positive and negative rainfall events by municipality, from 1981 to 2021. The methodology was based on data from orbital products with spatial and temporal resolution made available by the Climate Hazards Group InfraRed Precipitation with Stations (CHIRPS), and associated with the "Box plot" statistical model to identify the extremes. To describe the values of rainfall extremes, monthly precipitation accumulations were used, generating 12 graphs based on the series analyzed. The results show that the years with El Nino (1983) had the lowest accumulated rainfall (1,157mm), while the years with La Nina (1988) had the highest accumulated rainfall (4,055mm). The research was satisfactory in filling the lack of data on the variability and extremes of rainfall, especially when associated with large regions with scarce data. The products generated tend to contribute to climate research in the region.