FLUCTUATIONS AND TRENDS OF ANNUAL PRECIPITATION IN DIFFERENT CLIMATIC REGIONS OF CROATIA

Secular series of annual precipitation over Croatia have been studied at three stations representing the different climatic regions of Croatia: Osijek (continental precipitation climate), Zagreb-Gric (continental precipitation climate with maritime influence) and Crikvenica (maritime precipitation climate). The time series analysis has been deduced by using a ''quick test'' for stationarity according to Schonwiese and Malcher, moving average filters, the Mann-Kendall rank statistic, and a progressive test for trend according to Sneyers. From this analysis, the stationarity in time series of annual precipitation totals is stated over the entire interval at all locations except for a very short interval during the first decade of the twentieth century over the continental lowland (Osijek). A generally decreasing trend is present over the entire interval, but is statistically significant only in the continental lowland (Osijek).