BSF-NSF: Collaborative Research: Deciphering the role of extreme rainstorms and hydroclimatic regime on arid escarpment retreat and sub-cliff slope evolution
BSF-NSF:合作研究:解读极端暴雨和水文气候状况对干旱悬崖退缩和悬崖边坡演化的作用
基本信息
- 批准号:2100753
- 负责人:
- 金额:$ 5.44万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2021
- 资助国家:美国
- 起止时间:2021-07-01 至 2024-06-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Desert scenery often includes lines of cliffs draped with boulders and debris, presenting obstacles to hikers and highway engineers alike. Although it may not be obvious to the casual motorist, such desert cliffs, or escarpments, contain clues about the changing environment. For example, aprons of debris shed from cliffs during landslides and storms tell a story of past changes in rainfall and temperature, extending back thousands of years in the past. Until recently, it had only been possible to read that story in its broadest outlines. Today, new data and technologies are making it possible to decipher the story much more clearly. Using detailed terrain maps obtained from airborne laser surveys, together with rainfall records, new methods for dating sedimentary features, and computer simulations, this binational US-Israel project sets out to understand how rainfall shapes desert landforms over the long term, and to provide insight into how environmental changes might translate into hazards to people and adjacent infrastructure in the short term.A recent National Academy report highlighted an understanding of causes and consequences of topographic change as a top-priority research item. To this end, arid-region escarpments provide natural laboratories in which to study connections between precipitation and landforms, both because deserts minimize the confounding influence of vegetation and because their distinctive landforms are thought to reflect past changes in rainfall. This project tests the hypothesis that landforms associated with desert cliff retreat bear signatures of rainfall magnitude-frequency relationships. The project leverages three sites in the USA and Israel that span a gradient in hydroclimatic regime from hyperarid to arid, with systematically varying rainstorm properties. Analysis of high temporal resolution rainfall data (radar and gauges), lidar topography, geochronology, and field experiments in the Colorado Plateau (US) and the Negev Desert (Israel) will inform a suite of numerical experiments using a landscape evolution model. The impacts of heterogenous space-time rainstorm characteristics on escarpment retreat will be assessed, and new methods to upscale rainstorm variability to landscape evolution timescales will be developed. Numerical models and data tools for this project will be developed as new components in Landlab Toolkit, an open-source simulation software library, expanding their utility to the broader scientific community. Analyses and results from this project will also provide materials for two new learning modules for the Utah State University Native American STEM Mentorship Project, which provides gateway research experiences for freshman-level Native American students.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
沙漠风景通常包括一排排的悬崖,上面覆盖着巨石和碎片,给徒步旅行者和公路工程师带来了障碍。虽然对于普通的驾车者来说,这可能并不明显,但这些沙漠悬崖或悬崖包含了环境变化的线索。例如,滑坡和风暴期间从悬崖上脱落的碎片围裙讲述了过去降雨和温度变化的故事,可以追溯到数千年前。直到最近,人们只能从最广泛的角度来解读这一故事。今天,新的数据和技术使我们有可能更清楚地解读这个故事。利用从机载激光勘测中获得的详细地形图,加上降雨记录,确定沉积特征年代的新方法和计算机模拟,这个美国-以色列两国项目着手了解降雨如何长期塑造沙漠地貌,并提供有关环境变化如何在短期内转化为对人类和邻近基础设施的危害的见解。将了解地形变化的原因和后果作为优先研究项目。为此,干旱地区的悬崖提供了研究降水与地形之间联系的天然实验室,这既是因为沙漠最大限度地减少了植被的混淆影响,也是因为其独特的地形被认为反映了过去降雨量的变化。这个项目测试的假设,地貌与沙漠悬崖撤退承担降雨量的频率关系的签名。该项目利用了美国和以色列的三个站点,这些站点跨越了从极端干旱到干旱的水文气候系统梯度,具有系统变化的暴雨特性。分析高时间分辨率降雨数据(雷达和仪表),激光雷达地形,地质年代学,并在科罗拉多高原(美国)和内盖夫沙漠(以色列)的实地实验将告知一套使用景观演变模型的数值实验。将评估异质时空暴雨特征对悬崖退缩的影响,并将开发新的方法来将暴雨变异性升级到景观演变的时间尺度。该项目的数值模型和数据工具将作为开放源代码模拟软件库Landlab Toolkit的新组件开发,将其效用扩大到更广泛的科学界。该项目的分析和结果还将为犹他州州立大学美国原住民STEM导师项目的两个新学习模块提供材料,该项目为新生级别的美国原住民学生提供入门研究经验。该奖项反映了NSF的法定使命,并通过使用基金会的智力价值和更广泛的影响审查标准进行评估,被认为值得支持。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Joel Pederson其他文献
Joel Pederson的其他文献
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{{ truncateString('Joel Pederson', 18)}}的其他基金
Collaborative Research: Exploring the tempo of exhumation and relief development to investigate mantle-to-surface connections around the Yellowstone hotspot
合作研究:探索折返和地貌发育的节奏,以调查黄石热点周围地幔与地表的联系
- 批准号:
2126367 - 财政年份:2022
- 资助金额:
$ 5.44万 - 项目类别:
Standard Grant
Development and assessment of mobile geo-referenced games for geoscience education using the Grand Canyon as a virtual laboratory
使用大峡谷作为虚拟实验室开发和评估用于地球科学教育的移动地理参考游戏
- 批准号:
1245948 - 财政年份:2013
- 资助金额:
$ 5.44万 - 项目类别:
Standard Grant
Technician Support: New Utah State University Luminescence Geochronology Laboratory
技术人员支持:新犹他州立大学发光地质年代学实验室
- 批准号:
0744455 - 财政年份:2008
- 资助金额:
$ 5.44万 - 项目类别:
Continuing Grant
Geomorphic and geochronologic study in and near Grand Canyon: Testing landscape responses to climate change and exploring the paleo-longitudinal profile of the Colorado River
大峡谷及其附近的地貌和地质年代学研究:测试景观对气候变化的响应并探索科罗拉多河的古纵向剖面
- 批准号:
0346054 - 财政年份:2004
- 资助金额:
$ 5.44万 - 项目类别:
Continuing Grant
Collaborative Research: Exhumation of the Colorado Plateau - Spatial and Temporal Distribution and Implications for Landscape Evolution
合作研究:科罗拉多高原的挖掘——时空分布及其对景观演化的影响
- 批准号:
0409845 - 财政年份:2004
- 资助金额:
$ 5.44万 - 项目类别:
Standard Grant
SGER: Construction of a Timely, Powerful, and Public GIS Database to Resolve the Landscape Evolution of the Interior Western US
SGER:构建及时、强大、公共的 GIS 数据库,解决美国西部内陆景观演化问题
- 批准号:
0341067 - 财政年份:2003
- 资助金额:
$ 5.44万 - 项目类别:
Standard Grant
Collaborative Research: Tectonic Geomorphology of Grand Canyon--Testing a Hypothesis for Differential Incision Due to Quaternary Slip on the Hurricane-Torweap Fault System
合作研究:大峡谷构造地貌--验证飓风-托威普断层系第四纪滑移差异切割假说
- 批准号:
0107065 - 财政年份:2001
- 资助金额:
$ 5.44万 - 项目类别:
Standard Grant
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