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

该奖项支持一个合作项目，分析泰勒圆顶核心的冰和泰勒冰川暴露的冰，以测量锶、钕和铪同位素组成的变化，微量元素浓度，主要阴离子和阳离子，以及灰尘大小数据，以便分配冰内灰尘的来源。提出的工作的智力价值在于提供来源信息，这些信息将用于在千年尺度上研究沙尘通量对大、快速的区域和全球（半球）气候变化的响应。这项工作的第一部分将集中在泰勒圆顶核心的冰上，然后过渡到泰勒冰川的表面冰。pi将根据捕获气体的甲烷和氧同位素组成收集已知年龄的大型样本；样品足够大，可以对不同大小的馏分进行测量。将进行平行的工作，以确定南半球（新西兰、澳大利亚、南非）和当地（维多利亚北部和南部地区）可能携带和沉积在泰勒巨蛋地区的粉尘源物质的放射性成因同位素值。这项研究的广泛影响包括合作、推广、教育和多样性倡议。这项工作将与密歇根大学、俄亥俄州立大学、米兰-比可卡大学和比萨大学的研究人员进行国际合作，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。奖学金将资助一名博士研究生、一名硕士研究生和至少一名本科生。项目参与者将参与新成立的加州大学欧文分校美国印第安人暑期学校，为高中生提供地球系统科学课程，并以此项目为起点，讨论极地问题和气候变化。这个奖项在南极洲进行实地考察

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