Collaborative Research: Climate Controls on Aerosol Fluxes to Taylor Dome and Taylor Glacier

1246702/Aciego该奖项支持一个合作项目，该项目旨在分析泰勒穹顶核心的冰和泰勒冰川暴露的冰，以测量锶、钕和氢的同位素组成、微量元素浓度、主要阴离子和阳离子以及尘埃尺寸数据的变化，从而确定冰层中尘埃的来源。拟议工作的学术价值是提供来源信息，这些信息将用于调查数千年尺度上大规模、快速的区域和全球(半球)气候变化的尘埃通量响应。工作的第一部分将集中在泰勒穹顶核心的冰上，然后过渡到泰勒冰川的表面冰上。PI将根据被困气体的甲烷和氧同位素组成收集已知年龄的大型样本；样本将足够大，可以对不同大小的部分进行测量。将同时开展工作，以确定南半球(新西兰、澳大利亚、南非)和当地(维多利亚州北部和南部)尘埃来源物质的放射性同位素值，这些尘埃源物质可能携带和沉积在泰勒穹顶地区。这项研究的更广泛影响包括协作、外展、教育和多样性倡议。这项工作将是与密歇根大学、俄亥俄州立大学、米兰-毕科卡大学和比萨大学的研究人员进行的国际合作，后两所大学位于意大利。研究成果的传播将包括科学论坛和公开讲座。基金将为一名博士生、一名硕士研究生和至少一名本科生提供支持。项目参与者将参与新的加州大学欧文分校美国印第安人地球系统科学暑期学校，利用该项目作为讨论极地问题和气候变化的起点。该奖项在南极洲进行了实地考察。

1246702/AciegoThis award supports a collaborative project to analyze ice from the Taylor Dome core and exposed ice from Taylor Glacier to measure variations in the isotopic composition of Strontium, Neodymium, and Hafnium, trace element concentrations, major anions and cations, and dust size data in order to assign provenance of dust within the ice. The intellectual merit of the proposed work is to provide provenance information that will be used to investigate the dust flux response to large, rapid regional and global (hemispheric) climate changes on a millenia scale. The first part of the work will focus on ice from the Taylor Dome core and then transition to surface ice from Taylor Glacier. The PIs will collect large-sized samples of known age based on the methane and oxygen isotope composition of the trapped gases; samples will be large enough to carry out measurements on different size fractions. Parallel work will be done to determine the radiogenic isotope values of southern hemisphere (New Zealand, Australia, South Africa) and local (Northern and Southern Victoria Land) dust source material that are potentially entrained and deposited across the Taylor Dome region. The broader impacts of this research encompass collaborative, outreach, educational, and diversity initiatives. The work will be an international collaboration with researchers at the University of Michigan, Ohio State University, Università Milano-Bicocca, and Università di Pisa, the latter two in Italy. Dissemination of research findings will include both scientific forums and public lectures. Funding will provide support for one PhD student, one MS student, and at least one undergraduate student. The project participants will be involved in the new UC Irvine American Indian Summer School in Earth System Science for high school students using this project as a jumping off point for discussing polar issues and climate change. This award has field work in Antarctica