Spatial and temporal variation of meteorological parameters in the lower Tigris-Euphrates basin, Türkiye: application of non-parametric methods and an innovative trend approach.

In this study, Mann-Kendall (MK), Spearman's rho (SR), and innovative trend analysis with significance test (ITA-ST) are performed on about 53 years of meteorological parameters obtained from 23 meteorological stations located in the lower Tigris-Euphrates basin (LTEB), Türkiye. Finally, sequential Mann-Kendall (SMK) and Cusum tests are applied to detect any abrupt changes in annual time series. Results indicate that MK and SR demonstrate a significant trend in seven of the total annual precipitation series, and ITA-ST captures the existence of a significant trend in 21 of the 23 total annual precipitations.