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

基本信息

  • 批准号:
    2018222
  • 负责人:
  • 金额:
    $ 9.76万
  • 依托单位:
  • 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

项目摘要

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经验,基于地方的教育方法,以重建蒙大拿州西南部先锋山脉的冰川历史。该项目将使蒙大拿西部大学的第一代代表性不足的大学生沉浸在气候研究中。学生将与佛蒙特大学NSF支持的社区宇宙生成设施合作调查该地区的冰川历史。研究人员将测试一个假设,即位于大冰盖附近的冰川,经历了寒冷的温度和异常低的降水,可能比劳伦蒂德早得多地达到了当地的冰面积最大值(即,加拿大)冰盖最大(约21,000年前)。他们将通过对先锋山脉的冰川冰碛进行采样和测年来做到这一点。由于沿着大陆分水岭的山脉的阻挡,先锋山脉今天的降水量非常低。先锋山脉的冰川冰碛序列可能会对山地冰川对地球长期轨道波动和伴随的气候变化的反应机制产生新的认识。这个以地方为基础的研究项目将为本科生,其中许多人来自蒙大拿州的农村,提供一个身临其境的机会,以更好地了解自己的国家的景观,形成他们的地貌过程,以及它们所提供的重要气候信息。这项研究将提供对劳伦蒂德冰盖(LIS),在一个异常干燥的山脉,那里的冰川年代学还没有研究。先锋山脉是蒙大拿州西部少数几个由花岗岩覆盖的山脉之一,因此可以使用石英中的10Be进行宇宙成因核素暴露年龄,从而为该地区提供第一个冰碛石年表。调查人员将测试在ID东部和WY西北部发现的最大冰时间的差异是否是由于区域气候差异,例如由LIS或非气候因素(例如,高度测定法和响应时间)。这样的大气压系统将偏离西风海洋水分通量远离北方落基山脉的LIS开发,因此,冰川最大值的先驱者可能先于LIS最大值和上述冰川系统。这项工作的结果将促进对极端干燥和非常寒冷条件下温度依赖性冰川的理解,提供关于世界上最寒冷,最干燥地区当前冰川如何应对现代气候变暖的见解。该项目由地貌学和土地利用动力学计划(GLD)和激励竞争研究的既定计划(EPSCoR)共同资助。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

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Spruce Schoenemann其他文献

Spruce Schoenemann的其他文献

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{{ truncateString('Spruce Schoenemann', 18)}}的其他基金

Collaborative Research: EHR-Polar DCL: Polar Space and Place: Using GIS and interactive environments to bring polar science to the classroom
合作研究:EHR-Polar DCL:极地空间和地点:利用 GIS 和交互式环境将极地科学带入课堂
  • 批准号:
    2021275
  • 财政年份:
    2020
  • 资助金额:
    $ 9.76万
  • 项目类别:
    Standard Grant

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合作研究:IHBEM:这里的恐惧:将基于地点的旅行行为和检测整合到新型传染病模型中
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