Tendência das séries temporais de precipitação da região Sul do Brasil

Abstract

The aim of this study is to evaluate the occurrence of trends in time series of precipitation in southern Brazil. We analyzed daily, monthly and yearly time series from 18 rain gauges station. The normal and type I extreme probability distributions were used for data analysis. The Mann-Kendall test was also to detect trends or climatic variability. The results show a positive trend of daily annual maximum over time, as well as a significant increase of monthly and annual totals for most stations. The Mann-Kendal trend test shows statistically significant changes at a 95% level on 16 out of the 18 analyzed time series.