埃塞俄比亚中阿瓦士阿法尔地区的时空气候多变性和极端气候:对牧民和农牧民粮食安全的影响

IF 3.5 3区 社会学 Q2 ENVIRONMENTAL STUDIES
Ameha Tadesse Aytenfisu, D. Tolossa, S. T. Feleke, D. Ayal
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引用次数: 0

摘要

本研究旨在探讨气候变异现象及其对埃塞俄比亚阿法尔地区阿米巴拉和阿瓦什-芬塔勒地区牧民和农牧民粮食安全的影响。此外,还查阅了相关文献,对定量数据的字面意思进行了说明,这也是本研究对现有气候变化和变异性辩论的贡献。利用 Mann-Kendall 检验和 Sen's 坡度估计器确定时空趋势,利用变异系数和标准化异常指数分析变异性,并利用标准化降水指数/标准化降水蒸散指数确定干旱频率和严重程度。虽然最大降雨量和最小降雨量分别出现在夏季和冬季,但季节性降雨量和年降雨量分别以每季 2.51 毫米和每年 4.12 毫米的速度减少。研究地点的降雨季节变化很大。干旱分析结果证实,共观测到九次农业干旱,从中等年份到极端年份不等。总体而言,阿米巴拉和阿瓦什-芬塔勒地区的季节性降雨量和年降雨量呈下降趋势,降雨量的时间变化很大,气温不断升高,频繁的干旱事件意味着该地区的气候状况可能会对牧民和农牧民家庭的粮食安全产生不利影响。然而,对二手资料的分析表明,仅根据研究地区的气象记录来分析降水量会产生误导。这就解释了为什么洪水而非干旱正成为牧民和农牧民生计的主要灾难来源。实用意义对阿法尔地区气温和降雨动态的分析,以及所有发展干预措施的启动,都必须考虑到邻近地区的水文影响,这似乎是未来研究人员的有益方向。在这项研究中,我们采用了标准化和适当的方法,从而获得了丰富该领域现有知识的见解。这些见解有助于推动有关该主题的学术讨论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Spatiotemporal climate variability and extremes in Middle Awash Afar region Ethiopia: implications to pastoralists and agro-pastoralists food security
Purpose This study aims to examine the phenomenon of climate variability and its implications for pastoralists and agro-pastoralists food security in Amibara and Awash Fentale districts of the Afar region, Ethiopia. Design/methodology/approach The study relied on meteorological records of temperature and rainfall in the study area between 1988 and 2018. Besides, literature on the topic was reviewed to make caveats on the literal picture that comes from quantitative data, and that is the contribution of this study to the existing debate on climate change and variability. The spatiotemporal trend was determined using the Mann–Kendall test and Sen’s slope estimator, while variability was analyzed using the coefficient of variation and standardized anomaly index, and standardized precipitation index/standardized precipitation evapotranspiration index were applied to determine the drought frequency and severity. Findings The result reveals that the mean seasonal rainfall varies from 111.34 mm to 518.74 mm. Although the maximum and minimum rainfall occurred in the summer and winter seasons, respectively, there has been a decrease in seasonal and annual at the rate of 2.51 mm per season and 4.12 mm per year, respectively. The study sites have been experiencing highly seasonal rainfall variability. The drought analysis result confirms that a total of nine agricultural droughts ranging from moderate to extreme years were observed. Overall, the seasonal and annual rainfall of the Amibara and Awash Fentale districts showed a decreasing trend with highly temporal variations of rainfall and ever-rising temperatures, and frequent drought events means the climate situation of the area could adversely affect pastoral and agro-pastoral households’ food security. However, analysis of data from secondary sources reveals that analyzing precipitation just based on the meteorological records of the study area would be misleading. That explains why flooding, rather than drought, is becoming the main source of catastrophe to pastoral and agro-pastoral livelihoods. Practical implications The analysis of temperature and rainfall dynamics in the Afar region, hence the inception of all development interventions, must take the hydrological impact of the neighboring regions which appears to be useful direction to future researchers. Originality/value The research is originally conducted using meteorological and existing literature, and hence, it is original. In this research, we utilized a standardized and appropriate methodology, resulting in insights that augment the existing body of knowledge within the field. These insights serve to advance scholarly discourse on the subject matter.
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来源期刊
CiteScore
8.10
自引率
8.30%
发文量
43
审稿时长
15 weeks
期刊介绍: Effective from volume 10 (2018), International Journal of Climate Change Strategies and Management is an open access journal. In the history of science there have been only a few issues which have mobilized the attention of scientists and policy-makers alike as the issue of climate change currently does. International Journal of Climate Change Strategies and Management is an international forum that addresses the need for disseminating scholarly research, projects and other initiatives aimed to facilitate a better understanding of the subject matter of climate change. The journal publishes papers dealing with policy-making on climate change, and methodological approaches to cope with the problems deriving from climate change. It disseminates experiences from projects and case studies where due consideration to environmental, economic, social and political aspects is given and especially the links and leverages that can be attained by this holistic approach. It regards climate change under the perspective of its wider implications: for economic growth, water and food security, and for people''s survival – especially those living in the poorest communities in developing countries.
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