A 5.25‐m sediment core SRM‐1 and 45 surface samples from mangrove forests at the Shark River Estuary in the Everglades National Park, Florida, were examined by using X‐ray fluorescence and carbon isotopic analyses to study the history of intense hurricane landfall during the Late‐Holocene. Significance testing of the surface samples in relation to storm deposits from Hurricane Wilma suggests that elemental concentration of Sr and Cl and the ratio of Cl/Br are the most sensitive indicators for major hurricane events in our study area. The geochemical data sets of core SRM‐1 identified five active periods of intense hurricane activities during the last 3,500 years at ~3,400–3,000, ~2,200–1,500, ~1,000–800, ~600–300, and ~150 calibrated years before present to present. This is the longest paleohurricane record to date from South Florida. Our results are consistent with the view that intense hurricane activities in South Florida were modulated by Intertropical Convergence Zone (ITCZ) movements, El Niño/Southern Oscillation (ENSO) activities, and North Atlantic Oscillation (NAO) strength. This study contributes to the methodological advancement in paleotempestological studies by demonstrating that geochemical signals, particularly signals of saltwater intrusions, can be preserved in the sediment profiles on millennial time‐scale and measured by X‐ray fluorescence techniques, thereby enabling more storm records to be produced from otherwise suboptimal sand‐limited coastal systems such as the Florida Everglades. More work needs to be done to explore the use of geochemical and stable isotopic analyses in detecting storm signals from sand‐limited coastal environments.

中文翻译：

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佛罗里达大沼泽地晚全新世飓风事件的地球化学记录

通过使用X射线荧光和碳同位素分析研究了在佛罗里达州大沼泽国家公园的鲨鱼河口的5.25-m沉积物核心SRM-1和45个地表样品，该样品通过X射线荧光和碳同位素分析进行​​了研究。晚全新世。对与来自威尔玛飓风的暴风雨沉积物有关的地表样品进行的显着性测试表明，Sr和Cl的元素浓度以及Cl / Br的比值是我们研究区域发生重大飓风事件最敏感的指标。SRM-1核心的地球化学数据集确定了过去3,500年中飓风活动的五个活跃时期，分别为〜3,400–3,000，〜2,200–1,500，〜1,000–800，〜600–300和〜150校准年。展示。这是迄今为止南佛罗里达州最长的古飓风记录。我们的结果与以下观点相一致：南佛罗里达州的强烈飓风活动受热带辐合带（ITCZ）运动，厄尔尼诺/南方涛动（ENSO）活动和北大西洋涛动（NAO）强度调节。这项研究表明，地球化学信号，特别是盐水入侵的信号，可以在千年时间尺度上保留在沉积物剖面中，并通过X射线荧光技术进行测量，从而为古时空研究提供了方法学上的帮助，从而能够获得更多的风暴记录由原本不是最理想的受沙限制的沿海系统（例如佛罗里达大沼泽地）生产。需要做更多的工作来探索使用地球化学和稳定同位素分析来检测来自沙子有限的沿海环境的风暴信号。