O Ciclo diário de precipitações pluviais no município de Fortaleza, em intervalos de cinco minutos

Abstract

The research deals with the daily distribution of intense rainfall in the city of Fortaleza, Ceará. Were used 30 years of pluvi ograph observations of the climatological station of the Federal University of Ceará, in Campus do Pici. The studies were conducted with a single series, with all the values to determine an annual basis. Later, were used 12 monthly series, covering the p eriod from 30 years, to study the seasonality. Annual data were adjusted to sinusoidal curves and polynomials of the third degree, forced to maintain continuity, called cyclic polynomials. It was observed that the maximum rainfall occurs in the early hours of the day and the minimum rainfall occurs in the early evening. It was also studied in the monthly series the time interval size between the maximum and the minimum rainfall. This time interval was correlated with the duration of insolation. It concludes that there is a strong correlation between duration of insolation and the time interval between the maximum and the minimum rainfall