Collaborative Research: A place-based, student-led research project in the Pioneer Mountains, Montana: an investigation of very dry, alpine glaciation proximal to the Laurentide Ic

合作研究：蒙大拿州先锋山脉的一个以地方为基础、由学生主导的研究项目：对劳伦泰德IC附近非常干燥的高山冰川的调查

• 批准号: 2018059
• 负责人: Paul Bierman
• 金额: $ 3.74万
• 依托单位: University of Vermont & State Agricultural College
• 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: 2020-09-15 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2018059&HistoricalAwards=false
• 关键词: Collaborative; Research; place; based; student

This project will incorporate local geoscience students and an experiential, place-based educational approach to reconstruct the glacial history of the Pioneer Mountains in southwest Montana. This project will immerse first-generation, under-represented college students at the University of Montana Western in climate research. Students will investigate the region’s glacial history in collaboration with the NSF-supported Community Cosmogenic Facility at University of Vermont. The investigators will test the hypothesis that glaciers, located near large ice sheets and experience both cold temperatures and exceptionally low precipitation, may have reached local ice extent maximums considerably earlier than the Laurentide (i.e., Canadian) Ice Sheet maximum (~21,000 years ago). They will do this by sampling and dating glacier moraines in the Pioneer Mountains, which today have very low precipitation due to blocking by ranges along the Continental Divide. Glacier moraine sequences from the Pioneer Mountains may shed new understanding into the mechanisms by which mountain glaciers respond to Earth’s long-term orbital fluctuations and concomitant climatic changes. This place-based research project will provide the undergraduate students, many of whom are from rural Montana, with an immersive opportunity to better understand their own states’ landscapes, the geomorphic processes that formed them, and the important climatic information they provide.This research will provide insight into glacier advance and retreat during the last glaciation in continental climatic regions that were proximal to the Laurentide Ice Sheet (LIS), in an exceptionally dry mountain range where the glacial chronology has not been studied. The Pioneer Mountains are one of the few ranges in western Montana underlain by granite, making it feasible to use 10Be in quartz for cosmogenic nuclide exposure ages and thus produce the first moraine chronologies for the region. The investigators will test whether the differences in maximum-ice times found in eastern ID and northwestern WY are due to regional climatic contrasts, such as anticyclonic wind patterns driven by the presence of the LIS or non-climatic factors (e.g., hypsometry and response time). Such atmospheric pressure systems would deflect westerly maritime moisture flux away from the northern Rocky Mountains as the LIS developed, and therefore the glacier maxima in the Pioneers may precede the LIS maxima and the aforementioned glacier systems. Results from this work will advance the understanding of temperature-dependent glaciers under extremely dry and very cold conditions, providing insight about how current glaciers in the coldest, driest regions of the world may respond to modern climate warming. This project is jointly funded by the Geomorphology and Land-use Dynamics Program (GLD) and the Established Program to Stimulate Competitive Research (EPSCoR).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.

该项目将结合当地的地球科学学生和一种基于地点的教育方法，以重建蒙大拿州西南部先锋山的冰川历史。该项目将在蒙大拿州西部大学的气候研究中浸入第一代，代表性不足的大学生。学生将与佛蒙特大学的NSF支持的社区宇宙基础设施合作调查该地区的冰川历史。研究人员将检验以下假设：位于大冰块附近并经历寒冷温度和异常低的降水量的冰川可能已经达到了比劳伦德（Laurentide）（即加拿大）冰盖最高（约21，000年前）所考虑的局部冰量。他们将通过在先驱山脉中抽样和约会冰川冰山来做到这一点，如今，由于沿着大陆鸿沟的范围阻塞，降水量非常低。先驱山脉的冰川冰or序列可能对山地冰川对地球的长期轨道波动和随之而来的杂交变化做出反应的机制有了新的理解。这个基于地点的研究项目将为本科生提供，其中许多来自蒙大拿州的艰难的机会，有一个精彩的机会，可以更好地理解自己的州的景观，形成他们的地貌过程以及他们提供的重要气候信息。这项研究将在持续的登陆冰箱中脱颖而出，以洞察冰川的冰箱，以使人们对熟悉的冰川持续的冰箱，以使其在持续的冰箱中脱颖而出，以至于在持续的冰镇冰上脱颖而出，这将为冰镇冰镇冰镇冰箱远景而异常。冰川年表尚未研究的范围。先锋山是蒙大拿州西部范围内的少数范围之一，这使得在Quartz中使用10BE进行宇宙核素暴露年龄，因此可行，因此在该地区产生了第一个冰ora的时间表。研究人员将测试在东部ID和WY西北WY中发现的最大冰时间差异是否是由于区域气候对比，例如由LIS的存在或非气候因素（例如，催眠和反应时间）驱动的反气旋风模式。这种大气压力系统将随着LIS的发展而表现出远离北洛矶山脉的西部海洋水分通量，因此先驱者中的冰川最大值可能在Lis Maxima和后来的冰川系统之前。这项工作的结果将在极度干燥和非常寒冷的条件下提高人们对温度依赖性冰川的理解，从而了解最冷，驱动区域中当前冰川如何对现代气候变暖做出反应。该项目由地貌学和土地利用动力学计划（GLD）共同资助，启发竞争研究的既定计划（EPSCOR）。该奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子优点和更广泛的影响标准通过评估来评估的。