CAS-Climate: Understanding the link between regional climate patterns and water supply in the Horn of Africa

CAS-气候：了解非洲之角区域气候模式与供水之间的联系

• 批准号: 2132353
• 负责人: Zelalem Bedaso
• 金额: $ 30.88万
• 依托单位: University of Dayton
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-05-01 至 2025-04-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2132353&HistoricalAwards=false
• 关键词: CAS; Climate; Understanding; link; between

In recent decades, recurrent severe droughts in the Horn of Africa (HOA) have led to devastating socio-economic consequences. They have highlighted the need to understand the current availability and future sustainability of water resources under climate change in a region dominated by rain-fed subsistence agriculture. This project aims to establish the link between rain-producing atmospheric processes and available water resources. It will provide a comprehensive assessment of how climate change affects rainfall amount and variability, surface water availability, and groundwater recharge in a representative watershed in Ethiopia. This knowledge could provide important insight for the strategic planning of the region’s long-term sustainable development, particularly in terms of increasing food security, reducing vulnerability, and building resilience to climate-related natural disasters. The project will also foster international research collaboration between the US and Ethiopian scientists and students, and provide training, mentoring, and career development for under-represented groups in geological and hydrological sciences.This project aims to establish the link between regional climate patterns and water supply in the Horn of Africa (HOA). This knowledge is critical in understanding the sustainability of water resources under climate change in this region. To achieve this, the investigators adopt an interdisciplinary approach that integrates synoptic climate analysis and isotope hydro-geochemistry. The main objectives of this project include: (1) identify rain-producing circulation patterns and establish their inter-and intra-seasonal variability and past change in response to global warming, (2) establish distinct isotopic signatures of rainfall from different weather types through high-resolution precipitation isotope measurements in multiple sites across the climatic and elevation gradients, and (3) quantify the contribution of rainfall from different weather types to surface flow and groundwater recharge. The outcomes of this study will bridge the gap between changes in the large circulation patterns and their impacts on water resource availability at the watershed scale. The results can also be used to improve predictions of future rainfall variability and change, and assessment of future availability of surface and groundwater resources. In addition, the new water isotope dataset will provide a baseline for future hydro-climatic research and better interpretation of isotope climate proxy in the geologic record in a region important for human evolution.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

近几十年来，非洲之角反复发生的严重干旱造成了毁灭性的社会经济后果。他们强调，在一个以雨水供应的自给农业为主的区域，有必要了解气候变化下水资源目前的可获得性和未来的可持续性。该项目旨在建立产生降雨的大气过程与可用水资源之间的联系。它将全面评估气候变化如何影响埃塞俄比亚一个有代表性的流域的降雨量和变异性、地表水可获得性和地下水补给。这方面的知识可为本区域长期可持续发展的战略规划提供重要的见解，特别是在加强粮食安全、减少脆弱性和建设应对气候相关自然灾害的复原力方面。该项目还将促进美国和埃塞俄比亚科学家和学生之间的国际研究合作，并为地质和水文科学中代表性不足的群体提供培训、指导和职业发展。该项目旨在建立非洲之角地区气候模式和供水之间的联系。这一知识对于理解该区域气候变化下水资源的可持续性至关重要。为了实现这一目标，研究人员采用了一种综合了天气气候分析和同位素水文地球化学的跨学科方法。这个项目的主要目标包括：(1)确定产生降雨的环流模式，确定其季节间和季节内的变异性以及对全球变暖的过去变化；(2)通过在气候和海拔梯度的多个地点进行高分辨率降水同位素测量，建立不同天气类型降雨的不同同位素特征；(3)量化不同天气类型的降雨对地表径流和地下水补给的贡献。这项研究的结果将弥合大循环模式的变化与其对分水岭尺度上水资源可获得性的影响之间的差距。结果还可用于改进对未来降雨量变化和变化的预测，以及对未来地表水和地下水资源可用性的评估。此外，新的水同位素数据集将为未来的水文气候研究提供基线，并在对人类进化重要的地区的地质记录中更好地解释同位素气候指标。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。