Temporal and spatial changes of precipitation over Turkey

ABSTRACTThe aim of this thesis is to analyze of long term changes and trends inprecipitation probability over Turkey. Daily precipitation data which are recorded at111 stations are used in this study. Inhomogeneity in data is controlled with Kruskal-Wallis homogeneity test. Precipitation probability rates are estimated from rating ofmonthly, seasonal and annual rainy days to month, season and year. Long termtrends in precipitation probability are determined with Mann-Kendall rankcorrelation coefficient method and Least Square Linear Regression approach. Majorresults that are obtained from trend analysis are summarized as follows: (1) anincreasing trend is determined in annual precipitation probability over all Turkey.Number of station that is shown increasing trend is too much/great over wholerainfall regions except Mediterranean rainfall region; (2) also, an increasing trend isdetermined in seasonal scale except the winter season; (3) rate of statisticallysignificant results are not too much/great respect from rainfall regions. Butsignificant rates which were being high are observed in monthly analysis in someregions; (4) the increasing trend in precipitation probability is strong in Black Searainfall region. Rate of station which is haven an increasing trend are quite muchespecially in April and December. Contributed to understanding effects of globalclimate change over Turkey?s precipitation is thought with this thesis that isexplained general characteristics and observed changes of precipitation probabilityover Turkey.