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RUI: Groundwater occurrence and discharge at coral atoll and barrier reef systems

RUI：珊瑚环礁和堡礁系统的地下水出现和排放

基本信息

批准号：
1936671
负责人：
Klaus Hagedorn
金额：
$ 45.04万
依托单位：
California State University-Long Beach Foundation
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-04-01 至 2023-09-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1936671&HistoricalAwards=false
关键词：
RUI Groundwater occurrence discharge coral

项目摘要

Preservation of reef ecosystems in the face of climate change is one of the most pressing challenges in natural science. It requires thorough understanding of the interactions between terrestrial and reef environments. An important interaction is the flow of groundwater to the ocean as a key driver of environmental change in tropical island coral reefs. This study explores the hydrogeology of reef systems and traces the flow of groundwater and related chemicals to and through these systems. Results from this research benefit society by providing needed information about the role of submarine groundwater discharges on the health of reef systems. The project also serves to broaden the education and training of graduate and undergraduate students in a primarily undergraduate institution and partner with local organizations to increase scientific knowledge among community members. A short video documentary will be produced and distributed through media outlets and the National Geographic OpenExplorer blog site to reach a broad audience.The purpose of this work is to map, measure, and image the hydrogeology of reefs on a French Polynesian volcanic island (Mo’orea) and coral atoll (Tetiaroa) so that the groundwater flow to reefs can be constrained and up-scaled. The research integrates electrical resistivity profiling, radioisotope analysis, fiber optic distributed temperature sensing, coring and dye transport studies, thermal imagery, and numerical modeling, to trace groundwater movement to and through the reef. Proxies for reef metabolism, total alkalinity and dissolved inorganic carbon are analyzed to gage impact of submarine groundwater discharge on reef ecosystem functioning in an acidifying ocean. The results of this work support future strategic investigations of hydrologic impacts on both atoll and high-island reefs, including the NSF-funded Mo’orea Coral Reef Long Term Ecological Research (LTER) project.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.

面对气候变化，保护珊瑚礁生态系统是自然科学中最紧迫的挑战之一。它需要对陆地和珊瑚礁环境之间的相互作用有透彻的了解。一个重要的相互作用是地下水流入海洋，作为热带岛屿珊瑚礁环境变化的关键驱动因素。本研究探索了珊瑚礁系统的水文地质，并追踪了地下水和相关化学物质流入和流经这些系统的情况。这项研究的结果通过提供有关海底地下水排放对珊瑚礁系统健康作用的必要信息而造福社会。该项目还有助于在一所主要是本科院校扩大对研究生和本科生的教育和培训，并与当地组织合作增加社区成员的科学知识。将制作一个简短的视频纪录片，并通过媒体渠道和国家地理开放探索者博客网站发布，以吸引广泛的受众。这项工作的目的是在法属波利尼西亚火山岛（Mo 'orea）和珊瑚环礁（Tetiaroa）上绘制、测量和成像珊瑚礁的水文地质，以便限制和扩大地下水流向珊瑚礁的规模。该研究整合了电阻率分析、放射性同位素分析、光纤分布式温度传感、取芯和染料传输研究、热成像和数值模拟，以追踪地下水进入和穿过珊瑚礁的运动。分析了海底地下水排放对酸化海洋中珊瑚礁生态系统功能的影响，分析了珊瑚礁代谢、总碱度和溶解无机碳的代用指标。这项工作的结果支持了未来对环礁和高岛珊瑚礁水文影响的战略调查，包括美国国家科学基金会资助的Mo 'orea珊瑚礁长期生态研究（LTER）项目。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。