Collaborative Research: RAPID: Hurricane Ian's overwash deposit: impacts of high-intensity landfalling tropical cyclones in southwest Florida

合作研究：RAPID：飓风伊恩的过度冲刷沉积物：佛罗里达州西南部高强度登陆热带气旋的影响

• 批准号: 2308932
• 负责人: Isabel Hong
• 金额: $ 4.19万
• 依托单位: Villanova University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-01-01 至 2024-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2308932&HistoricalAwards=false
• 关键词: Collaborative; Research; RAPID; Hurricane; Ian

Tropical cyclones are amongst the most dangerous and costly natural hazards to impact U.S. coastlines. These events will have worsening effects with changing storm characteristics and sea-level rise in a warming climate. Most recently, southwest Florida has been impacted by two Category 4 hurricanes, Irma in 2017 and Ian in 2022. Two major events in the same region within 5 years presents a unique opportunity to study geological data from these storms. This rapid response project will explore the impact of high-intensity hurricanes by collecting geological data related to Hurricane Ian’s storm surge and sedimentary deposit. Further, previous work on Hurricane Irma in 2017 and 2019 will allow for a comparison between these two recent events. This multiple storm focus will help to understand the impact of hurricanes across the southwest Florida coast. The data will also add further knowledge about the preservation of geological deposits from repeated storms. Such data are crucial to improve understanding of past and present storm activity. The project advances broader representation in STEM through support of an all-female team of early career scientists and as well as undergraduate and graduate students.To extend our understanding of past tropical cyclones, we rely on geologic records to reconstruct a history of cyclone intensity and frequency beyond the instrumental period. However, reconstructing geologic records of tropical cyclones relies on modern analog studies of overwash deposits and how they are preserved in coastal environments. The aim of this study is to investigate two sites in southwest Florida by 1) measuring land elevation and recording the thickness and landward extent of Hurricane Ian’s overwash deposit and 2) comparing Ian’s deposit with a previous hurricane (Hurricane Irma) which also made landfall and deposited sediments throughout southwest Florida in 2017. The project is enabled by previous field investigations in 2017 and 2019 which documented Hurricane Irma overwash sediments in southwest Florida. Samples will be collected for sedimentologic (grain-size and organic content), geochemical (stable carbon isotopes and C/N values), and microfossil (foraminifera) analyses to compare biogeochemical indicators from Ian, Irma, and pre-storm sediments. Results of this project will advance paleo-storm studies in the sub-tropical southern Florida region by identifying key biogeochemical indicators and providing critical insight into the preservation potential of hurricane deposits in areas impacted by repeated, high-intensity hurricanes.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.

热带气旋是影响美国海岸线的最危险和昂贵的自然危害之一。这些事件将在变暖的气候下变化的风暴特征和海平面上升，使人感到遗憾的效果。最近，佛罗里达州西南部受到了两种4级飓风，2017年的IRMA和2022年的Ian的影响。在5年内，同一地区的两个重大事件为研究这些风暴中的地质数据提供了独特的机会。这个快速的响应项目将通过收集与飓风Ian的风暴潮和沉积矿床有关的地质数据来探索高强度飓风的影响。此外，以前关于2017年和2019年飓风IRMA的工作将允许这两个最近的事件进行比较。这种多次风暴的重点将有助于了解佛罗里达州西南部海岸的飓风的影响。数据还将增加有关从反复风暴中保存地质沉积物的进一步知识。此类数据对于提高对过去和现在风暴活动的理解至关重要。该项目通过支持早期职业科学家以及本科生和研究生的全女性团队的STEM代表。为了扩展我们对过去的热带气旋的理解，我们依靠地质记录来重建旋风强度和频率的历史，超过器乐。但是，重建热带气旋的地质记录取决于现代的模拟研究，覆盖沉积物及其在沿海环境中的保存方式。这项研究的目的是通过1）测量土地升高并记录飓风伊恩（Ian）的厚度和土地范围的厚度和土地范围，并将伊恩（Ian）的押金与先前的飓风（飓风irma）进行比较，这也使2017年西南部的Project in the Project在2017年造成了IRMA的降落和造成的危害。佛罗里达州西南部的沉积物。将收集用于沉积学（晶粒大小和有机含量），地球化学（稳定的碳同位素和C/N值）的样品，以及微化石（有孔虫）分析，以比较来自IAN，IRMA和Pre-Storm疫苗的生物地球化学指标。该项目的结果将通过确定关键的生物地球化学指标，并为飓风矿床的保存潜力提供了重复，高强度飓风影响的领域的保护潜力，从而提高佛罗里达州亚热带南部地区的古流态研究。该奖项反映了NSF的法定任务，反映了通过评估基金会的概念，并反映了基金会的支持，并将其视为基础范围。