Collaborative Research: Quantifying the contribution of alpine glacier meltwater to mountain-block recharge using microbiological markers and environmental isotopes

合作研究：利用微生物标记和环境同位素量化高山冰川融水对山体补给的贡献

• 批准号: 1904159
• 负责人: Trinity Hamilton
• 金额: $ 19.15万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-07-15 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1904159&HistoricalAwards=false
• 关键词: Collaborative; Research; Quantifying; contribution; alpine

Glaciers occur in mountains across the globe. Water from melting glaciers is important to humans and other organisms. Some of this water goes directly to streams while some will flow deep into the ground and refill groundwater. It is not known how much melt-water goes directly to streams versus to groundwater. This project uses water chemistry and biological data to determine where the water goes when a glacier melts. The project examines water from glaciers on Mt. Hood in Oregon and from glaciers in Glacier National Park in Montana. This project is training graduate students and multiple undergraduate students. The results are presented at scientific meetings and to water managers. The results are also available to the public via pamphlets and news articles. More than ninety percent of the Earth's alpine glaciers are in retreat and many of these glaciers will melt completely within this century. Very little research has been conducted on the impacts of alpine glacial meltwater to recharge and flow within the mountain block. This project seeks to identify the contribution of alpine glacial meltwater to mountain recharge relative to seasonal snow and rain using chemical and biological approaches. This research tests the following hypotheses: 1) The glacial environment selects for unique biota resulting in deoxyribonucleic acid (DNA) fingerprints in alpine glacial meltwater that are distinct from seasonal snow and rain; 2) Alpine glacial meltwater is a significant source of mountain recharge and sustains perennial flow to local and regional-scale springs located down-gradient of alpine glaciers. This research assesses the novel application of DNA as a tracer for mountain recharge and increases the ability to detect recharge from alpine glaciers located in different geologic and geographic settings. This study trains graduate students and multiple undergraduate researchers and engages with water managers.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.

冰川出现在遍布地球仪的山脉中。冰川融化的水对人类和其他生物很重要。其中一些水直接流入溪流，而另一些则会流入地下深处，重新填充地下水。目前还不知道有多少融水直接流入河流，而不是地下水。该项目使用水化学和生物数据来确定冰川融化时水的去向。该项目研究了来自Mt.胡德在俄勒冈州和冰川国家公园在蒙大拿州的冰川。该项目正在培养研究生和多名本科生。研究结果将在科学会议和水资源管理人员面前公布。调查结果也通过小册子和新闻文章向公众公布。 地球上90%以上的高山冰川正在退缩，其中许多冰川将在本世纪内完全融化。很少有研究已经进行了高山冰川融水的补给和流动的山块内的影响。该项目旨在确定高山冰川融水相对于使用化学和生物方法的季节性雪和雨对山区补给的贡献。这项研究测试了以下假设：1）冰川环境选择独特的生物群，导致高山冰川融水中的脱氧核糖核酸（DNA）指纹与季节性雪和雨不同; 2）高山冰川融水是高山补给的重要来源，并维持常年流向位于高山冰川梯度下的当地和区域规模的泉水。这项研究评估了DNA作为山区补给示踪剂的新应用，并提高了检测不同地质和地理环境中高山冰川补给的能力。 该奖项反映了NSF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。

项目成果

Recharge from glacial meltwater is critical for alpine springs and their microbiomes

冰川融水的补给对于高山泉水及其微生物组至关重要

• DOI: 10.1088/1748-9326/abf06b
• 发表时间: 2021
• 期刊: Environmental Research Letters
• 影响因子: 6.7
• 作者: Miller, Jordyn B.;Frisbee, Marty D.;Hamilton, Trinity L.;Murugapiran, Senthil K.
• 通讯作者: Murugapiran, Senthil K.