Tommaso Caloiero, Roberto Coscarelli, Ennio Ferrari, Marco Mancini, 2009, Trend detection of annual and seasonal rainfall in Calabria (Southern Italy), International journal of climatology (Online) (2009). doi_10.1002/joc.2055,
URL: http://www.cnr.it/prodotto/i/230624

In order to investigate the behaviour of climatic and hydrological variables, several statistical and stochastic techniques are currently applied to time series. In the present study a statistical analysis of annual and seasonal precipitation has been performed over 109 cumulated rainfall series with more than 50 years of data observed in a region of Southern Italy (Calabria). Trend analyses have been made by using both nonparametric (Mann-Kendall test) and parametric (linear regression analysis) procedures. The long historical series of monthly rainfall data employed in this work have been previously processed through a pre-whitening (PW) technique in order to reduce the autocorrelation of rainfall series and its effects on outcomes of trend detection. The application of the above mentioned procedures has shown a decreasing trend for annual and winter-autumn rainfall and an increasing trend for summer precipitation. Moreover the Mann-Whitney test has been used to evidence the possible change points in the data. The higher percentages of rainfall series show possible year changes during decade 1960-1970 for almost all of the temporal aggregation rainfall

Data from https://intranet.cnr.it/people/