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Collaborative Research: Sediment Transport Mechanisms and Geomorphic Processes Associated with Shore Ice along Cold Climate Coastlines

合作研究：与寒冷气候海岸线岸冰相关的沉积物输送机制和地貌过程

基本信息

批准号：
1916179
负责人：
Lucas Zoet
金额：
$ 28.27万
依托单位：
University of Wisconsin-Madison
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-08-01 至 2023-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1916179&HistoricalAwards=false
关键词：
Collaborative Research Sediment Transport Mechanisms

项目摘要

Cold climate coastlines are highly vulnerable to reduced winter ice cover in response to climate change. Limited or variable shore ice cover results in enhanced storm-induced coastal erosion and damage to coastal infrastructure. The dynamics of how reduced ice cover influences coastal evolution is poorly understood which inhibits accurate forecasting of future coastal response in cold climates. This work aims to improve our fundamental understanding of how sediment interacts with shore ice as well as the resulting coastal landscape change. The first part of the project will involve laboratory experiments aimed at studying the physics of sediment and ice interactions. The second part of the project will gather field measurements that use the laboratory measurements as a basis to investigate how cold climate coastlines naturally respond to the shore ice. This study will result in a model that will help explain how reduced and variable winter shore ice cover alters the coastal landscape, which will help coastal managers proactively plan for future climate change impacts. The project will train graduate and undergraduate students who will be recruited from groups underrepresented in the STEM fields. Public educational resources will be delivered to inner-city schools through partnership with Chicago Public Schools and will be shared nationally through The Scientific Research and Education Network (www.sciren.org), which is a science education non-profit founded by the PI.Accurate modeling of coastal evolution in cold climates is hindered by a limited understanding of the processes and responses associated with winter shore ice. This study will utilize unoccupied aerial and aquatic systems through a combined field and laboratory approach to test the hypothesis that variable ice cover is more erosive than consistent ice cover. This approach will yield the most comprehensive understanding to date of the morphodynamics of nearshore ice. Laboratory experiments in a frozen wave tank and ring shear apparatus will be used to constrain the forces required to entrain sediment within ice as well as the fundamental processes associated with transporting sediment-laden ice. Field investigations will be used to validate laboratory experiments as well as to describe the geomorphic processes and responses associated with shore ice. We will isolate the primary conditions facilitating sediment transport and shoreface geomorphic change during winter and resolve how the shoreface responds to these processes, which will provide the basis for models to include coastal evolution in cold temperature climates. The final result of this proposed study will be a conceptual model and set of empirically derived equations generated from the field and laboratory measurements that describe how shore ice drives sediment transport. This knowledge will be shared with practitioners through Great Lakes Coastal Zone Management Programs, local and regional stakeholder groups, and federal agencies.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.

气候寒冷的海岸线极易受到气候变化导致的冬季冰盖减少的影响。有限或多变的海岸冰盖导致风暴引起的海岸侵蚀加剧，沿海基础设施遭到破坏。冰盖减少如何影响海岸演变的动态还知之甚少，这阻碍了对未来寒冷气候下海岸反应的准确预测。这项工作旨在提高我们对沉积物如何与海岸冰相互作用以及由此引起的沿海景观变化的基本理解。该项目的第一部分将涉及旨在研究沉积物和冰相互作用的物理的实验室实验。该项目的第二部分将收集现场测量，以实验室测量为基础，调查寒冷气候的海岸线对海岸冰的自然反应。这项研究将产生一个模型，有助于解释冬季海岸冰覆盖减少和变化如何改变沿海景观，这将帮助沿海管理人员积极规划未来气候变化的影响。该项目将培训研究生和本科生，他们将从STEM领域代表性不足的群体中招聘。公共教育资源将通过与芝加哥公立学校的合作伙伴关系提供给市中心的学校，并将通过科学研究和教育网络(www.sCiren.org)在全国范围内共享，科学研究和教育网络是由PI.创建的一个非营利性科学教育组织。由于对冬季海岸冰的过程和反应的有限理解，阻碍了对寒冷气候下海岸演变的准确建模。这项研究将利用空置的空中和水上系统，通过现场和实验室相结合的方法来验证变化的冰盖比一致的冰盖更具侵蚀性的假设。这一方法将产生迄今为止对近岸冰形态动力学的最全面的了解。将使用冻结波槽和环形剪切仪中的实验室实验来限制将沉积物卷进冰中所需的力，以及与输送含沙冰相关的基本过程。实地调查将用于验证实验室实验以及描述与海岸冰有关的地貌过程和反应。我们将分离有利于冬季泥沙输送和岸面地貌变化的主要条件，并解决岸面对这些过程的响应，这将为包括寒冷温度气候下的海岸演变的模型提供基础。这项拟议研究的最终结果将是一个概念模型和一套根据现场和实验室测量得出的经验公式，这些公式描述了海岸冰如何驱动沉积物的运输。这些知识将通过五大湖海岸带管理计划、当地和地区利益相关者团体以及联邦机构与实践者共享。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势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（3）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Nearshore ice complex breakup is controlled by a balance between thermal and mechanical processes

近岸冰复合体的破裂是由热过程和机械过程之间的平衡控制的

DOI：
10.1002/esp.5698
发表时间：
2023
期刊：
Earth Surface Processes and Landforms
影响因子：
3.3
作者：
Theuerkauf, Ethan J.;Zoet, Lucas K.;Dodge, Stefanie E.;Tuttle, William;Rawling, III, J. Elmo
通讯作者：
Rawling, III, J. Elmo

Patterns and processes of beach and foredune geomorphic change along a Great Lakes shoreline: Insights from a year-long drone mapping study along Lake Michigan

五大湖沿岸海滩和预兆地貌变化的模式和过程：沿密歇根湖进行的为期一年的无人机测绘研究的见解