Collaborative Research: How to trace glacial meltwater in the ocean using ship-portable hydrographic analysis of dissolved neon and krypton

合作研究：如何利用溶解氖和氪的船舶便携式水文分析来追踪海洋中的冰川融水

• 批准号: 2201836
• 负责人: Strawn Toler
• 金额: $ 25万
• 依托单位: University of South Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-10-15 至 2025-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2201836&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.

该奖项将建立一个新的仪器来测量海洋冰川融水。将冰川融化与海冰、雪融化和降雨区分开来是一项困难但重要的任务，因为冰川融化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挑战，因为它们在复杂和难以到达的地方展开：在数英里的冰下，在浮动的冰架下，以及在一年中最冷的时候。 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。测量能力的提高将使人们能够比较南极洲和格陵兰冰盖陆地上冰川融化的区域和季节变化。 该仪器将在罗得岛沿海沃茨进行实地验证，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。罗得岛大学和SRI国际之间的伙伴关系是一个重要的公私伙伴关系，将鼓励使用私营部门的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未来的环境传感技术劳动力，支持硕士生完成学位，以及冰川冰架的模型以及它们与海洋的相互作用。 该奖项旨在通过开发一种可测量溶解在水和海水中的20 Ne，22 Ne和184 Kr的便携式“融水质谱仪”来推进海洋冰川融化的追踪。这一进步是可能的，这要归功于气体净化的发展，也要归功于测量氖的质荷比光谱的新分析能力，我们预测这将为分析带来新的精度。氖是一种已证明难以在便携式惰性气体分析仪中解析的分析物。这将大大降低成本，并通过消除复杂的样品储存和在极地地区收集样品与随后在国内进行实验室分析之间的滞后时间来扩大我们现有的样品容量。我们还预计，将MWMS技术直接纳入SRI国际水下质谱仪，使未来的AUV任务能够到达难以到达的地区，如产犊前沿和冰架空腔。我们将利用国际扶轮州政府提供的R/V“奋进号”的航行时间资金，并在玛格丽特湾的一次完整的实地试验中再次测试和改进MWMS原型，该试验是在RVIB LM Gould上进行的年度帕尔默LTER水文考察的一部分。该奖项反映了NSF的法定使命，并被认为值得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来支持。