RAPID: Collaborative Research: Using the Hurricane Michael Event Layer for Developing a Paleo-Tempestite Archive at Strandplain Swales, St. Vincent Island, Florida

RAPID：协作研究：使用迈克尔飓风事件图层在佛罗里达州圣文森特岛的 Strandplain Swales 开发古风暴岩档案

• 批准号: 1906114
• 负责人: Zhixiong Shen
• 金额: $ 2.69万
• 依托单位: Coastal Carolina University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-12-15 至 2022-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1906114&HistoricalAwards=false
• 关键词: RAPID; Collaborative; Research; Using; Hurricane

The project is a rapid-response study of the Hurricane Michael event along the Florida Panhandle coast that experienced the most severe geomorphological impact of this high Category 4 storm in October 2018. Research will focus on collecting cores and samples from sediments deposited by Hurricane Michael on beach ridge swales of St. Joseph Island, Florida and in the area of the Florida Apalachicola Delta. These recently deposited sediments and deposits will have relevance to establishing possible reconstructions of hurricane events over the last ~3,000 years that have impacted this section of the Gulf Coast of the US. Further study of collected sediments and geomorphic changes will help provide detailed information about the frequency, intensity, and wind fields (i.e., direction of storm approach) of strong storms and hurricanes in the past. Broader impacts of the work include student training in rapid response sampling techniques and in providing information that can be used by coastal managers, residents, insurance companies and policy makers regarding the frequency and intensities of hurricanes in this part of the US Gulf Coast. The data collected may also allow inference as to the impacts of human and other environmentally-induced climate change on future hurricanes and the development of new and high-quality proxy records for understanding past storm events.Hurricane Michael, the strongest hurricane known to hit the Florida Gulf Coast, provides an opportunity to examine how a storm event layer (i.e., tempestite) is recorded in strandplain deposits. This research will sample Hurricane Michael deposits on St. Vincent Island, Florida and those in the wetlands of the Apalachicola Delta and adjacent mainland. Project objectives are to (1) map the characteristics (e.g., thickness, granulometry, primary sedimentary structures) of the Michael event layers in the study area as it is expressed across multiple subaerial swales, swale ponds, and coastal wetlands; (2) collect and sample cores of the Hurricane Michael event layer using procedures that will preserve the optically stimulated luminescence signature of the sand fraction; and (3) gather a comprehensive record of ancillary Hurricane Michael datasets from multiple sources (i.e., agencies and individual investigators). Goals are to build a dataset to allow construction of key spatio-temporal parameters shaping the morphological response of coastal systems, like St. Vincent Island, to major storms and how various parameters, such as wind field, storm surge level, wave field, and coastal currents evolved over the course of the storm. The Michael dataset will provide critical information that can aid in recognizing paleo-tempestites in the St. Vincent record, improve our understanding of how optically stimulated luminescence is expressed in hurricane tempestites, and allow calibration of hindcast models of process-geomorphological response that can reconstruct individual paleo-events.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.

该项目是对佛罗里达狭长地带沿岸的迈克尔飓风事件的快速响应研究，该事件在 2018 年 10 月经历了这场高强度 4 级风暴最严重的地貌影响。研究将重点收集飓风迈克尔在 2018 年 10 月沉积的沉积物中的岩心和样本。佛罗里达州圣约瑟夫岛的海滩山脊洼地和佛罗里达州阿巴拉契科拉三角洲地区。这些最近沉积的沉积物和沉积物将有助于重建过去约 3,000 年来影响美国墨西哥湾沿岸这一地区的飓风事件。对收集的沉积物和地貌变化的进一步研究将有助于提供有关过去强风暴和飓风的频率、强度和风场（即风暴接近方向）的详细信息。这项工作的更广泛影响包括对学生进行快速响应采样技术培训，以及提供可供沿海管理者、居民、保险公司和政策制定者使用的有关美国墨西哥湾沿岸该地区飓风频率和强度的信息。收集的数据还可以推断人类和其他环境引起的气候变化对未来飓风的影响，并开发新的高质量代理记录以了解过去的风暴事件。迈克尔飓风是已知袭击美国的最强飓风。佛罗里达州墨西哥湾沿岸提供了研究如何在滩涂平原沉积物中记录风暴事件层（即风暴岩）的机会。 这项研究将对佛罗里达州圣文森特岛以及阿巴拉契科拉三角洲和邻近大陆湿地的迈克尔飓风沉积物进行采样。项目目标是 (1) 绘制研究区域迈克尔事件层的特征（例如厚度、粒度、原生沉积结构），因为它在多个地面洼地、洼地池塘和沿海湿地中表现出来； (2) 使用保留沙子部分光激发光特征的程序收集迈克尔飓风事件层的岩心并进行采样； (3) 从多个来源（即机构和个人调查人员）收集迈克尔飓风辅助数据集的全面记录。目标是建立一个数据集，以构建关键的时空参数，塑造圣文森特岛等沿海系统对主要风暴的形态响应，以及各种参数（例如风场、风暴潮水平、波浪场和沿海洋流在风暴过程中不断演变。 迈克尔数据集将提供关键信息，有助于识别圣文森特记录中的古风暴岩，提高我们对飓风风暴岩中光激发光如何表达的理解，并允许校准可重建的过程地貌响应的后报模型。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。