Collaborative Research: Millennial variability of hillslope dynamics and alluvial aggradation in semiarid regions: a view from the southern Hemisphere

合作研究：半干旱地区山坡动态和冲积物加积的千年变化：南半球的观点

• 批准号: 1349405
• 负责人: Robert Negrini
• 金额: $ 5.37万
• 依托单位: CSUB Auxiliary for Sponsored Programs Administration
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-05-01 至 2016-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1349405&HistoricalAwards=false
• 关键词: Collaborative; Research; Millennial; variability; hillslope

This international, multi-institutional, collaborative project will advance our knowledge regarding how alluvial and fluvial geomorphic systems respond to climate change at millennial timescales in arid and semiarid regions. The project specifically aims to analyze the coupled hydrologic and geomorphic response during post-glacial times in the arid Elqui valley in northern Chile. Cosmogenic nuclides, luminescence dating and soils stratigraphy will be used to characterize, in terms of process and timing, the production, storage and transport of sediment from hillslopes to alluvial and fluvial reaches. Two nearby lacustrine records will be analyzed over the same temporal window with a suite of paleoenvironmental indicators. The robust coupled dataset is expected to contribute to our understanding of the local and regional pedology, geomorphology, tectonics and paleoenvironment of the semiarid western Andes. Furthermore, understanding how landforms and soils evolve over Holocene timescales will contribute to geologic research of similar regions in other parts of the world.The project will contribute to the advancement of undergraduate geology programs at University of Nevada Reno and California State University Bakersfield, the latter a Hispanic-Serving Institution. The project has a strong international partnership with Centro de Estudios Avanzado en Zonas Aridas (CEAZA) in La Serena, Chile, as well as Dalhousie University in Canada and will provide international research experiences for two U.S. undergraduate students. The research will aid land use planning and hazards mitigation efforts for the region as well as other parts of the world with similar arid environments. Outreach activities will be coordinated with the Chilean partner. This project is jointly supported by the Geomorphology and Land Use Dynamics, Paleoclimatology, and International Science and Engineering programs.

这一国际性、多机构的合作项目将推进我们对干旱和半干旱地区冲积和河流地貌系统如何在千年时间尺度上应对气候变化的认识。该项目的具体目标是分析智利北方干旱的Elqui山谷冰川期后的水文和地貌反应。 宇宙成因核素、发光测年法和土壤地层学将用于从过程和时间方面确定沉积物从山坡到冲积和河流河段的产生、储存和运输的特征。两个附近的湖泊记录将在同一时间窗口进行分析，一套古环境指标。强大的耦合数据集预计将有助于我们了解当地和区域的土壤学，地貌，构造和半干旱的西安第斯山脉的古环境。 此外，了解全新世时间尺度上地形和土壤如何演变将有助于世界其他地区类似地区的地质研究。该项目将有助于推进内华达州大学里诺和加州州立大学贝克斯菲尔德的本科地质学课程，后者是一所为西班牙裔服务的机构。 该项目与智利拉塞雷纳的Centro de Estudios Avanzado en Zonas Aridas（CEAZA）以及加拿大的达尔豪西大学建立了强有力的国际合作伙伴关系，并将为两名美国本科生提供国际研究经验。 这项研究将有助于该地区以及世界上其他具有类似干旱环境的地区的土地利用规划和减灾工作。 将与智利伙伴协调外联活动。 该项目由地貌学和土地利用动力学，古气候学和国际科学与工程计划共同支持。