Collaborative Research: Assessing Climatic Controls on Intervals of Stability and Deposition on Alluvial Fans

合作研究：评估冲积扇稳定和沉积间隔的气候控制

• 批准号: 0719893
• 负责人: Warren Sharp
• 金额: $ 7.73万
• 依托单位: Berkeley Geochronology Center
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0719893&HistoricalAwards=false
• 关键词: Collaborative; Research; Assessing; Climatic; Controls

This research will investigate the roles of climate and tectonics in controlling rates and processes of landscape evolution. The goal is to establish the response time of the landscape to changes in climatic forcing, (e.g. storm intensity, effective moisture, mean annual temperature, frost action, and type and density of vegetation). The response of a landscape is manifest in terms of the production and storage of sediment, weathering rates, and stream discharge and sediment transport capacity. Specifically, this study will combine cutting-edge techniques (including cosmogenic radionclides and thermo-luminescence) to generate quantitative ages of alluvial fan surfaces in the semi-arid Lost River Valley of southeastern Idaho, USA. Together with geomorphic and sedimentological analyses of the fan surfaces, it will be possible to determine when the conditions for both sediment supply and transport are met in semi-arid environments. This project supports research programs for two under-represented early career scientists and enhances interactions between students and faculty at Boise State University, Utah State University, and UC Berkeley. The proposed work aids development of analytical facilities, supports growing graduate programs at Boise State and USU, and provides partial funding and a recruiting tool for Boise State's new PhD program in Geosciences. This project improves undergraduate education by funding four undergraduate senior projects, and integrates research goals with Boise State's field geology course. Combined Boise State, USU, and Idaho State undergraduate field trips to the study area will enhance camaraderie and interactions between students and faculty at these neighboring institutions, and will provide students an example of science in action.

这项研究将调查气候和构造在控制景观演化速率和过程中的作用。 目标是确定景观对气候强迫变化的响应时间（例如风暴强度、有效湿度、年平均温度、霜冻作用以及植被类型和密度）。 景观的响应体现在沉积物的产生和储存、风化速率以及河流流量和沉积物输送能力方面。 具体来说，这项研究将结合尖端技术（包括宇宙放射性碰撞和热释光）来生成美国爱达荷州东南部半干旱失落河谷冲积扇表面的定量年龄。 结合扇表面的地貌和沉积学分析，将有可能确定半干旱环境中何时满足沉积物供应和运输的条件。 该项目支持两名代表性不足的早期职业科学家的研究项目，并加强博伊西州立大学、犹他州立大学和加州大学伯克利分校的学生和教师之间的互动。 拟议的工作有助于开发分析设施，支持博伊西州立大学和 USU 不断发展的研究生项目，并为博伊西州立大学新的地球科学博士项目提供部分资金和招聘工具。 该项目通过资助四个本科生高级项目来改善本科生教育，并将研究目标与博伊西州立大学的野外地质学课程相结合。 博伊西州立大学、USU 和爱达荷州立大学本科生联合前往研究区域进行实地考察将增强这些邻近机构的学生和教师之间的友情和互动，并为学生提供科学实践的范例。