Quality control and homogeneity of annual precipitation data in Büyük Menderes Basin Western Turkey

OpenAlex İngilizce

Quality control process involving outlier trimming and homogeneity checking were performed on the annual total precipitation data with various lengths for 20 stations in Buyuk Menderes Basin, Western Turkey. Homogeneity analyses were carried out using Standard normal homogeneity test (SNHT) for a single break, the Buishand Range test, the Pettitt test, and Runs-test. Then, the results of the different tests are grouped into three classes: “useful”, “doubtful” and “suspect”. 12 stations were labelled “useful”, 4 stations “doubtful, and 4 stations “suspect”. On the other hand, simultaneous change points detected may suggest a general indication of the existence of a common largescale physical mechanism influencing regional precipitation variability. Therefore, the results from statistical testing for inhomogeneity should be interpreted considering regional climate change associated with atmospheric circulation patterns.