Collaborative Research: How to trace glacial meltwater in the ocean by shipboard hydrographic analysis of dissolved neon and krypton

合作研究：如何通过溶解氖和氪的船上水文分析来追踪海洋中的冰川融水

• 批准号: 1924140
• 负责人: Brice Loose
• 金额: $ 34.42万
• 依托单位: University of Rhode Island
• 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: 2020-04-15 至 2025-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1924140&HistoricalAwards=false
• 关键词: Collaborative; Research; How; trace; glacial

This award will build a new instrument to measure meltwater from glaciers in the ocean. Distinguishing glacier melt from sea ice, snow melt, and rain is a difficult but important task because melting glaciers threaten significant and acute consequences, including chronic flooding and sea level rise. The causes and impacts of melting glaciers are a challenge to observe and predict, because they unfold in complex and hard to reach places: beneath miles of ice, under floating ice shelves, and during the coldest times of the year. The objective of this instrument is to increase oceanographer's capacity to measure and map glacier melt in the ocean by 300-400%, while reducing costs and providing near real-time results. This increase in measurement capacity will permit comparison of regional and seasonal changes in the glacier melt from the ice-covered land masses of Antarctica and Greenland. The instrument will be field validated in Rhode Island coastal waters, and then it will be used to measure glacier melt near the US Palmer Station on the Antarctic Peninsula. The partnership between the University of Rhode Island and SRI international presents an important public-private partnership that will encourage the use of private-sector technology for open access research, and recruit the future workforce in environmental sensing technology by employing undergraduate ocean engineers, supporting a Masters student in the completion of their degree, and through exhibit models of glacial ice shelves and their interactions with the ocean. This award seeks to advance tracing of glacier melt in the ocean by developing a ship-portable "meltwater mass spectrometer" that measures 20Ne, 22Ne, and 184Kr dissolved in water and seawater. This advance is possible thanks to developments in gas purification, but also thanks to a new analytical capacity to measure the mass-to-charge spectrum of neon that we predict will bring new precision to the analysis. Neon is an analyte that has proven difficult to resolve in portable noble gas analyzers. It will dramatically reduce cost and expand our existing sample capacity by eliminating complicated sample storage and the lag time between sample collection in polar regions and subsequent laboratory analysis at home. We further anticipate that it will be straightforward to incorporate the MWMS technology into the SRI International underwater mass spectrometer, enabling future AUV missions to inaccessible regions, such as calving fronts and ice shelf cavities. We will test and refine the MWMS prototype by leveraging RI State funding for ship time on the R/V Endeavor and again during a full field trial in Marguerite Bay as part of the annual Palmer LTER hydrographic expedition aboard the RVIB LM Gould.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.

该奖项将建造一种新仪器来测量海洋冰川融水。区分冰川融化与海冰、雪融化和降雨是一项艰巨但重要的任务，因为冰川融化可能会带来严重而严重的后果，包括长期洪水和海平面上升。冰川融化的原因和影响是观察和预测的一项挑战，因为它们在复杂且难以到达的地方展开：数英里的冰层下、漂浮的冰架下以及一年中最冷的时期。 该仪器的目标是将海洋学家测量和绘制海洋冰川融化图的能力提高 300-400%，同时降低成本并提供近乎实时的结果。测量能力的提高将允许比较南极洲和格陵兰岛冰雪覆盖的陆地上冰川融化的区域和季节变化。 该仪器将在罗德岛州沿海水域进行现场验证，然后将用于测量南极半岛美国帕尔默站附近的冰川融化情况。罗德岛大学和 SRI 国际之间的合作伙伴关系是一种重要的公私合作伙伴关系，将鼓励使用私营部门技术进行开放获取研究，并通过雇用本科海洋工程师来招募环境传感技术领域的未来劳动力，支持硕士生完成学位，并通过展示冰川冰架模型及其与海洋的相互作用。 该奖项旨在通过开发一种可测量水和海水中溶解的 20Ne、22Ne 和 184Kr 的船用便携式“融水质谱仪”来推进对海洋中冰川融化的追踪。这一进步的实现得益于气体净化技术的发展，同时也得益于测量氖质荷谱的新分析能力，我们预计这将为分析带来新的精度。氖气是一种难以在便携式稀有气体分析仪中解析的分析物。通过消除复杂的样品存储以及极地地区样品采集与随后的国内实验室分析之间的滞后时间，它将显着降低成本并扩大我们现有的样品容量。我们进一步预计，将 MWMS 技术整合到 SRI International 水下质谱仪中将很容易，从而使未来的 AUV 任务能够到达难以到达的区域，例如崩解锋和冰架空腔。我们将利用 RI 州资助的 R/V Endeavour 船航行时间以及在玛格丽特湾进行的全面现场试验来测试和完善 MWMS 原型，作为 RVIB LM Gould 号上年度 Palmer LTER 水道测量探险的一部分。该奖项反映了通过使用基金会的智力价值和更广泛的影响审查标准进行评估，NSF 的法定使命被认为值得支持。