TÜRKİYE’NİN YAĞIŞ TOPLAMI VE YOĞUNLUĞU DİZİLERİNDEKİ DEĞİŞİKLİKLERİN VE EĞİLİMLERİN ZAMANSAL VE ALANSAL ÇÖZÜMLEMESİ

Abstract

In the study, long-term changes and trends in the series of seasonal and annual precipitation total and precipitation intensity of 111 stations in Turkey were analyzed by considering their spatial and temporal characteristic. Homogeneity of precipitation series and trends in precipitation total and precipitation intensity series were tested with the methods of Kruskal-Wallis homogeneity test and Mann-Kendall rank correlation coefficient test, respectively. Major findings of the paper can be summarized as follows: (1) Apparent decreasing trends in annual precipitation totals and precipitation intensity amounts are stronger in the Mediterranean and Black Sea rainfall regime regions of Turkey. (2) There is an apparent decreasing (drying) trend in the precipitation totals of winter season, while a general increasing trend is dominant in the precipitation totals of spring, summer and autumn. (3) Precipitation intensity amounts have tended to show a decrease in all seasons, and this decrease is stronger than the decrease detected in precipitation totals in terms of both coherence of the spatial distribution and magnitude of the statistical significance. (4) Decreasing trends observed in precipitation totals and precipitation intensity amounts are the strongest over the Mediterranean and the Black Sea rainfall regime regions. (5) Decreasing trend in precipitation intensity became stronger after the year 1950

Keywords

• precipitation
• observed climate change and variability
• kruskal-wallis homogeneity and mann-kendall trend tests