Chronostratigraphic investigations on coastal sedimentary records such as washover fans or beach‐ridge sequences may be used to reconstruct storm chronologies on centennial to millennial time scales. However, modern analogs are pivotal in interpreting depositional processes and reducing uncertainty in evaluating the complex chronostratigraphic architecture of these landforms. Such a modern analog was provided by category 3 tropical cyclone (TC) Olwyn in 2015, which caused a significant storm surge in the Exmouth Gulf (Western Australia). Pre‐ and post‐TC Olwyn geomorphological surveys and high‐resolution drone‐derived topographical data of a large washover fan document a detailed history of erosion and deposition during the event. The modern analog deposits provided an excellent opportunity to evaluate the use of luminescence‐based proxies (luminescence inventories) for tracing event‐related sediment source environments and understanding transport processes. Sediments deposited during Olwyn show a systematic relationship between luminescence characteristics and washover fan position. Seaward and central washover sections are indicated by well‐bleached deposits due to the beach as the dominant source and/or long transport distances. Lateral washover deposits are characterized by rather local source areas and short transport distances, resulting in higher remnant ages of 70–140 a. Our data show that the combination of sediment source environments and sediment transport length across the fan represents the main control in resetting the luminescence signal and enabling reliable depositional ages to be calculated. It documents the benefit of investigating luminescence inventories when establishing chronologies from complex sedimentary records, thereby demanding a careful consideration of local processes and source areas when interpreting sedimentary TC records.

中文翻译：

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结合无人机衍生的数字高程模型和单颗粒发光数据，揭示冲洗风扇的泥沙输运途径和地貌变化

对沿岸沉积记录（如冲刷扇或海滩山脊序列）的年代地层调查可用于重建百年至千年尺度的风暴年代。但是，现代类似物对于解释沉积过程和减少评估这些地貌复杂的年代地层结构的不确定性至关重要。2015年，第3类热带气旋（TC）Olwyn提供了这样的现代类似物，这在埃克斯茅斯海湾（西澳大利亚州）引起了极大的风暴潮。TC Olwyn之前和之后的地貌学调查以及大型冲洗风扇的高分辨率无人机衍生地形数据记录了事件期间侵蚀和沉积的详细历史。现代的模拟沉积物为评估基于发光的代理（发光清单）用于追踪与事件相关的沉积物源环境和了解运输过程提供了极好的机会。Olwyn期间沉积的沉积物显示出发光特性和冲洗风扇位置之间的系统关系。由于海滩是主要来源和/或运输距离较长，因此向海和中央冲刷断面的沉积物漂白得很好。侧向冲刷沉积物的特征是相当局部的源区和短的运输距离，导致70-140 a的较高残留年龄。我们的数据表明，沉积物源环境和沉积物在风扇上的传输长度的组合代表了重置发光信号和计算可靠沉积年龄的主要控制方法。它记录了根据复杂的沉积记录建立年代顺序时调查发光清单的好处，因此在解释沉积的TC记录时需要仔细考虑本地过程和源区。