Data underlying the publication: Resetting of quartz and feldspar luminescence signals under water

This dataset documents a one-day field experiment that quantified how daylight resets luminescence signals of sand-sized quartz and feldspar grains in turbid, tidal-inlet waters. Sand samples were exposed in situ at multiple depths in a tidal inlet while concurrent measurements of underwater light spectra and suspended sediment concentration (SSC) were collected. Single-grain luminescence analyses show a clear, depth-dependent bleaching pattern: a shallow zone where grains bleach within a day and a deeper “bleaching front” below which no significant resetting occurred during the experiment. The observed bleaching depths correspond with predictions made from the measured subaqueous light spectra and mineral-specific photo-ionization behavior.<br>The dataset includes:<br>Raw and processed single-grain luminescence data for quartz and feldspar (raw reader files and derived signal data).In-situ light spectra recorded throughout the exposure.OBS turbidity records and calibrated suspended sediment concentration (SSC) profiles, with the calibration file.Metadata describing sample locations, exposure depths, and timing.All data-processing scripts (R and MATLAB) and commented analysis code used to extract signals, convert turbidity to SSC, and produce figures and tables.Figures and tables generated from the analysis.<br>Instruments and provenance: luminescence measurements were produced using Netherlands Centre for Luminescence Dating (NCL) equipment; SSC and calibration protocol is described in the manuscript following standard protocols. Background and sample information is available via the NCL database under project code NCL-1123. For more information see README file.<br>This dataset supports coastal sediment transport studies, luminescence dating and tracing applications, validation of subaqueous bleaching models, and development of sensor-based SSC estimation methods.

本数据集记录了一项为期一天的野外实验，定量分析了浑浊潮汐水道水体中砂级石英与长石颗粒的光释光信号如何被日光重置。砂质样品被原位暴露于潮汐水道的多个深度梯度中，同步采集了水下光光谱与悬浮泥沙浓度（Suspended Sediment Concentration, SSC）的测量数据。单颗粒光释光分析结果显示出清晰的深度依赖性漂白模式：分为浅层区域与深层“漂白锋面”，浅层区域内颗粒可在一日内完成漂白，而锋面之下的样品在实验期间未发生显著的信号重置。观测到的漂白深度与基于实测水下光光谱及矿物特异性光电离行为得出的预测结果相符。
本数据集涵盖以下内容：
1. 石英与长石的单颗粒光释光原始及处理后数据（含光释光阅读器原始文件与衍生信号数据）；
2. 样品暴露全程记录的原位水下光光谱数据；
3. 光学背散射传感器（OBS）浊度记录与经校准的悬浮泥沙浓度剖面，附带校准文件；
4. 描述样品采集位置、暴露深度与实验时长的元数据；
5. 用于信号提取、浊度转换为悬浮泥沙浓度、生成图表与表格的全部数据处理脚本（R语言与MATLAB脚本）及带注释的分析代码；
6. 分析过程生成的全部图表与表格。
仪器与数据来源：光释光测量采用荷兰光释光测年中心（Netherlands Centre for Luminescence Dating, NCL）设备完成；悬浮泥沙浓度及其校准流程遵循行业标准规范，详见相关研究论文。背景与样品信息可通过NCL数据库以项目代码NCL-1123查询获取。更多详情请参阅数据集附带的README文件。
本数据集可用于支撑海岸泥沙输运研究、光释光测年与示踪应用、水下漂白模型验证，以及基于传感器的悬浮泥沙浓度估算方法开发。