VARIABILIDADE DA INTENSIDADE DA PRECIPITAÇÃO NO PERÍODO CHUVOSO EM RECIFE-PE / RAINFALL INTENSITY VARIABILITY IN THE RAINY SEASON IN REEF-PE

One of the ways to study rainfall behavior is through the Precipitation Anomaly Index (IAC), this index helps to monitor rainfall behavior and allows to evaluate years with scarcity or abundance in the rainfall regime. The objective of this research is to analyze the occurrence of extreme rainfall events using the IAC for the city of Recife-PE associated with the extreme climate phenomenon El Niño South Oscillation (ENOS) and meteorological systems. We used 58 years of monthly rainfall data from 1961 to 2019 for the months of June and July, which were chosen because they presented Brazilian Journal of Development Braz. J. of Develop., Curitiba, v. 6, n. 9, p.69045-69053 ,sep. 2020. ISSN 2525-8761 69045 the highest annual rainfall index. Through the IAC, rainy and dry periods were calculated for understanding the research. The index showed great variability in extreme rainfall events for positive anomalies. For the month of June, the IAC detected 35 years with rainfall and 25 years classified as dry period. There was a variation in the index from -2.52 to 3.24. For the month of July were detected in 30 years with positive precipitation anomaly and 29 with negative anomaly, so for this period the extreme events both for precipitation and for extreme droughts the index varied between -2.70 to 2.79. Therefore, it is hoped that the present research can collaborate with the understanding and analysis of the behavior of extreme rainfall events in northeastern Brazilian capitals.