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    Öğe
    Effects of Southern Oscillation and North Sea-Caspian Pattern on the rainfall intensity series in the Black Sea Region of Türkiye
    (Hungarian Meteorological Service, 2026) Keskin, Asli Ulke; Kazembeigi, Reza; Zeybekoglu, Utku
    This study investigates the influence of the Southern Oscillation and North Sea-Caspian Pattern on maximum rainfall intensities in the Black Sea Region of T & uuml;rkiye. Annual maximum rainfall intensity series from 16 meteorological stations were analyzed, and correlation coefficients were calculated and evaluated at . = 0.01, 0.05, and 0.10 significance levels. Results indicate that the Southern Oscillation predominantly affects short-and medium-duration rainfall in Sinop, whereas the North Sea-Caspian Pattern shows significant correlations with medium-and long-duration rainfall in Bart & Otilde;n, Bayburt, and G & uuml;m & uuml;& uacute;hane. These findings highlight the spatially varying influence of atmospheric oscillations on rainfall extremes in the region.
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    Öğe
    Evaluation of the relationships between atmospheric indices and rainfall intensities: Black Sea region Türkiye
    (Elsevier, 2024) Keskin, Asli Ulke; Kazembeigi, Reza; Zeybekoglu, Utku
    Recent studies show that global atmospheric oscillations are effective on climate parameters. In this study, the relationship between the North Atlantic Oscillation and the Arctic Oscillation with the annual maximum rainfall intensity series throughout the Black Sea region of T & uuml;rkiye was investigated. In this context, the correlation coefficients between atmospheric oscillations and rainfall intensities were calculated. The correlations obtained were evaluated at the significance levels of alpha = 0.01, alpha = 0.05 and alpha = 0.10 according to Student t test. As a result of these evaluations; It was determined that the Arctic Oscillation was effective on rainfall intensities in & Ccedil;orum, Artvin, Rize and Bart & imath;n. In particular, significant correlations were found in all standard times in Artvin. Significant correlations were found between the North Atlantic Oscillation and the standard rainfall intensity series in & Ccedil;orum, Sinop, Artvin, Rize and Bayburt.
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    Öğe
    The Temporal Trends of the Turkish Black Sea Rainfall Intensities Series and Relationships with Global Atmospheric Indices: 1966-2015
    (Springer Basel Ag, 2025) Keskin, Asli Ulke; Kazembeigi, Reza; Zeybekoglu, Utku
    The extent of research indicates that global atmospheric oscillations exert a significant influence on climate parameters. This study aims to investigate the relationship between major atmospheric oscillations and annual maximum rainfall intensities across the Black Sea region of T & uuml;rkiye between 1966 and 2015. To this end, correlation coefficients were computed-assessed for statistical significance at the alpha = 0.05 level using the Student's t-test. Additionally, temporal trends in rainfall intensities were examined using the innovative trend analysis (ITA) method. The results suggest that the Arctic Oscillation and the North Atlantic Oscillation have a more pronounced effect in the eastern parts of the region. However, the ITA findings revealed no statistically significant trends in rainfall intensities across the study period.