Below-normal availability of water for a considerable period of time induces occurrence of drought. This paper investigates the Spatio-temporal characteristics of meteorological drought under changing climate. The climate change was analyzed using delta based statistical downscaling approach of RCP 4.5 and RCP 8.5 in R software packages. The meteorological drought was assessed using the Reconnaissance Drought Index (RDI). The result of climate change projections showed that the average annual minimum temperature will be increased by about 0.8–2.9 °C. The mean annual maximum temperature will be also increased by 0.9–3.75 °C. The rainfall projection generally showed an increasing trend, it exhibited an average annual increase of 3.5–13.4 % over the study area. The projected drought events reached its maximum severity indicated extreme drought in the years 2043, 2044, 2073, and 2074. The RDI value shows drought will occurred after 1–6 and 2–7 years under RCP 4.5 and RCP 8.5 emission scenarios respectively over the study area. Almost more than 72 % of the current and future spatial coverage of drought in the study area will be affected by extreme drought, 22.3 % severely and 5.57 % also moderate drought. Therefore, the study helps to provide useful information for policy decision makers to implement different adaptation and mitigation measures of drought in the region.

中文翻译：

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气候变化下埃塞俄比亚北部半干旱地区气象干旱的时空特征

在相当长的一段时间内低于正常水平的水会导致干旱的发生。本文研究了气候变化下的气象干旱时空特征。使用R软件包中的RCP 4.5和RCP 8.5基于增量的统计缩减方法对气候变化进行了分析。使用侦查干旱指数（RDI）评估了气象干旱。气候变化预测的结果表明，年平均最低温度将增加约0.8–2.9°C。年平均最高温度还将增加0.9–3.75°C。降雨预测总体上呈上升趋势，在研究区域内年均增长3.5-13.4％。预计的干旱事件达到最大严重程度，表明在2043、2044、2073和2074年将发生极端干旱。RDI值显示，在RCP 4.5和RCP 8.5排放情景下，分别在1–6年和2–7年后发生干旱。学习区。研究区域目前和未来干旱的空间覆盖率将近72％受极端干旱的影响，严重干旱影响22.3％，中度干旱影响的比例为5.57％。因此，该研究有助于为政策决策者提供有用的信息，以实施该地区不同的干旱适应和减缓措施。研究区域目前和未来干旱的空间覆盖率将近72％受极端干旱的影响，严重干旱影响22.3％，中度干旱影响的比例为5.57％。因此，该研究有助于为政策决策者提供有用的信息，以实施该地区不同的干旱适应和减缓措施。研究区域目前和未来干旱的空间覆盖率将近72％受极端干旱的影响，严重干旱影响22.3％，中度干旱影响的比例为5.57％。因此，该研究有助于为政策决策者提供有用的信息，以实施该地区不同的干旱适应和减缓措施。