Data underlying the publication "Subaqueous bleaching of single-grain K-feldspar luminescence signals"

We deployed a full-day bleaching field experiment with irradiated feldspar samples tethered to a pole at various positions within and above the water column to quantify: 1) the bleaching potential, i.e. the light intensity and spectrum as a function of time, depth, and tidal stage; and 2) the bleaching efficiency, i.e. the degree of bleaching of infrared stimulated luminescence (IRSL) and post-infrared IRSL (pIRIR) signals measured at 150, 225 and 290°C after a full day of light exposure above and below water.<br>+ Luminescence measurementsAll measurements were performed on an automated Risø TL/OSL-DA-15 reader with a single-grain attachment with IR laser. A LOT I-410 interference filter was used to target the 410 nm peak emission of K-feldspar (Huntley et al., 1991). We used a multiple-elevated-temperature (MET) pIRIR measurement protocol after (Li &amp; Li, 2011). Sixty datapoints were read-out in 2s (0.033s per datapoint), of which 50 datapoints were collected during stimulation. For each sample, 3 full single-grain discs were measured.<br>+ Light spectra measurementsTwo TriOS RAMSES SAMIP ACC-2 VIS spectrometers, with a spectral wavelength range between 320 and 950 nm, were used to monitor the light spectra at the surface and below water. The subaqueous spectrometer was attached to a sturdy frame and moved up and down the water column with the help of a pulley to measure the subaqueous light penetration. Inundation depth was monitored using a pressure sensor. The other spectrometer was attached to the jetty and measured the subaerial light conditions. Both spectrometers faced upward and were read out simultaneously.<br>+ Measurement protocols and data formats The measurement protocols were written in Riso's sequence editor software. All Riso software is downloadable at: https://www.fysik.dtu.dk/english/research/radphys/research/radiation-instruments/tl_osl_reader/software. <br>+ Processing and analysis scripts in R <br>All processing of data (modifications, calculations, etc) and analysis of data was performed in R. All scripts are commented. Per experiment an R script was written.  <br>+ Figures and tables <br>All figures and tables were created through R. Refer to the R scripts for detailed information within the script.

我们开展了为期全天的野外光漂白实验，将辐照长石样品系于支撑杆上，放置于水柱内部及上方的不同位置，以量化两项核心指标：1）光漂白潜力，即光强与光谱随时间、深度及潮汐阶段的变化规律；2）光漂白效率，即全天在水面上下曝光后，于150、225和290℃下测得的红外激发发光（infrared stimulated luminescence，IRSL）及红外后激发发光（post-infrared IRSL，pIRIR）信号的漂白程度。
+ 发光测量
所有测量均在配备红外激光器单颗粒附件的自动化Risø TL/OSL-DA-15型读数仪上完成。使用LOT I-410型干涉滤光片匹配钾长石（K-feldspar）的410 nm发射峰（Huntley等，1991）。我们参考Li与Li（2011）的方法，采用多升温温度（multiple-elevated-temperature，MET）pIRIR测量方案。60个数据点在2秒内完成读取（每个数据点耗时0.033秒），其中50个数据点在激发过程中采集。每个样品共计测量3个完整的单颗粒圆盘。
+ 光光谱测量
采用两台TriOS RAMSES SAMIP ACC-2型可见光谱仪，其光谱波长范围为320~950 nm，用于监测水面及水下的光光谱。水下光谱仪固定于坚固框架，借助滑轮沿水柱上下移动，以测量水下光穿透特性。淹没深度通过压力传感器监测。另一台光谱仪安装于码头，用于监测大气光环境。两台光谱仪均朝上安装并同步读取数据。
+ 测量方案与数据格式
测量方案通过Risø的序列编辑软件编写。所有Risø软件均可从以下网址下载：https://www.fysik.dtu.dk/english/research/radphys/research/radiation-instruments/tl_osl_reader/software。
+ R语言数据处理与分析脚本
所有数据处理（包括修改、计算等）与数据分析均通过R语言完成，所有脚本均附带注释，每个实验对应编写一份专属R脚本。
+ 图表与表格
所有图表均通过R语言生成，详细信息可参阅对应R脚本中的内容。