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<p>In this study, the meteorological drought of the Mediterranean region, which represents the most significant risk area in Turkey regarding drought and forms the southern border, was evaluated using the Standardized Precipitation Index (SPI) method with precipitation data measured at 28 stations between 1970 and 2022. The data are divided into different periods: the first period (FP) between 1970 and 1996, the second period (SP) between 1997 and 2022, and all period (AP) between 1970 and 2022 to assess the change in meteorological drought in the region from the past to the present. Applying the run theory to the SPI series obtained in these periods, duration, severity, intensity, and peak values are calculated for wet and dry conditions. The Mann-Kendall (MK), Spearman-Rho (SR), and Innovative Trend Analysis (ITA) methods are applied to ascertain the change in the spatial occurrence of drought classes. The study reveals that drought exhibits distinct characteristics and occurrence rates in different regions of the study area, with notable differences between the western and eastern regions. The study region exhibits considerable variability in average duration and severity. The results indicated that extreme and severe drought-wet conditions have increased again after a 30-year interval. Furthermore, it is determined that the region is experiencing significant shifts in extreme wet and dry conditions and extreme events related to flooding and drought.</p>

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Examination of area-based trend and drought characteristics of drought classes in the context of climate change

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月4日

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  • Oguz Simsek,
  • Halil İbrahim Şenol,
  • Ali Demir Keskiner

摘要

In this study, the meteorological drought of the Mediterranean region, which represents the most significant risk area in Turkey regarding drought and forms the southern border, was evaluated using the Standardized Precipitation Index (SPI) method with precipitation data measured at 28 stations between 1970 and 2022. The data are divided into different periods: the first period (FP) between 1970 and 1996, the second period (SP) between 1997 and 2022, and all period (AP) between 1970 and 2022 to assess the change in meteorological drought in the region from the past to the present. Applying the run theory to the SPI series obtained in these periods, duration, severity, intensity, and peak values are calculated for wet and dry conditions. The Mann-Kendall (MK), Spearman-Rho (SR), and Innovative Trend Analysis (ITA) methods are applied to ascertain the change in the spatial occurrence of drought classes. The study reveals that drought exhibits distinct characteristics and occurrence rates in different regions of the study area, with notable differences between the western and eastern regions. The study region exhibits considerable variability in average duration and severity. The results indicated that extreme and severe drought-wet conditions have increased again after a 30-year interval. Furthermore, it is determined that the region is experiencing significant shifts in extreme wet and dry conditions and extreme events related to flooding and drought.