Periglacial Landscape Evolution in Antarctic Lava Flows and Glacial Tills

该项目利用宇宙成因核素测年和激光雷达研究表面粗糙度，以了解南极洲干旱山谷的风化和景观演变。这项工作的重点是两个过程：冻土的低温扰动和古代熔岩流上图案化冻土的发展。该方法包括He 3分析的创新用途。研究结果也将被应用于了解干旱山谷的冰川历史。这对了解东南极冰盖的历史和火星景观的形成有潜在的应用价值。更广泛的影响包括研究生教育。同样，这项工作可能有助于我们了解南极冰盖的历史，这对于模拟它们在全球气候变化期间的行为非常重要。

This project uses cosmogenic nuclide dating and LIDAR studies of surface roughness to understand weathering and landscape evolution in the Dry Valleys of Antarctica. The work focuses on two processes: cryoturbation of frozen soils and the development of patterned, frozen ground on ancient lava flows. The approach includes innovative uses of He3 profiling. Results will also be applied to understanding the glacial history of the Dry Valleys. There are potential applications to understanding the history of the East Antarctic Ice Sheet and the formation of Martian landscapes. The broader impacts include graduate student education. As well, the work may contribute to our understanding of the history of the Antarctic ice sheets, which is important to modeling their behavior during global climate change.