Dataset for MS_DPL

In December 2024, a sediment core was collected from Dongpo Lake, a tropical urban artificial lake located in northeastern Hainan Province, China. This dataset presents grain-size and geochemical records spanning the period 1978–2025.
The sheet “210Pb dating” contains 210Pb geochronological data, including sediment depth, excess 210Pb activity, and the corresponding error bars.
The sheet “Particle Size (μm)” provides the percentage distribution of particle-size fractions between 0 and 2000 μm for each sediment layer.
The sheet “Grain Size Parameters” includes the main grain-size statistical parameters, namely mean grain size, sorting coefficient, skewness, and kurtosis.
The sheet “C–M diagram” contains the data used for C–M pattern analysis, including the grain size of the coarsest 1% fraction (C) and the median grain size (M).
The sheets “Grainsize vs f-EM” and “Year vs f-EM” present the results of end-member modeling analysis.
The sheet “Typhoon-Precip-Wind vs EM” contains correlation analysis data between end-member contribution scores and typhoon-related meteorological variables, including typhoon name, date, intensity near Haikou, maximum wind speed near Haikou, landfall location, total precipitation, and average typhoon intensity.
The sheet “Year-Precip vs EM” contains correlation analysis results between end-member contribution scores and precipitation amounts across different rainfall intervals from 1983 to 2025, including precipitation values for four rainfall categories.
The sheet “XRF Cps-Ratio-ppm” contains XRF scanning data for elemental intensities, environmentally meaningful elemental ratios and absolute concentration data for elements.
The sheet “EF & Igeo” provides enrichment factor (EF) data for eight elements, including sample element/Ti ratios, background values, EF values and geoaccumulation index data.

2024年12月，研究团队从中国海南省东北部的热带城市人工湖——东坡湖采集了一根沉积岩芯。本数据集涵盖1978—2025年的粒度与地球化学记录。

"210Pb测年（210Pb dating）"工作表包含210Pb年代学数据，涵盖沉积深度、过剩210Pb活度及其对应误差棒。

"粒度（μm，Particle Size (μm)）"工作表提供了各沉积层0~2000μm粒级的百分含量分布。

"粒度参数（Grain Size Parameters）"工作表包含主要粒度统计参数，即平均粒径、分选系数、偏度与峰态。

"C-M图（C–M diagram）"工作表包含用于C-M模式分析的数据，包括最粗1%颗粒的粒径（C值）与中值粒径（M值）。

"粒度与f-EM（Grainsize vs f-EM）"与"年份与f-EM（Year vs f-EM）"工作表展示了端元模拟分析（end-member modeling analysis）的结果。

"台风-降水-风速与EM（Typhoon-Precip-Wind vs EM）"工作表包含端元贡献得分与台风相关气象变量的相关性分析数据，涵盖台风名称、日期、海口附近台风强度、海口附近最大风速、登陆地点、总降水量与平均台风强度。

"年份-降水与EM（Year-Precip vs EM）"工作表包含1983—2025年不同降雨区间内端元贡献得分与降水量的相关性分析结果，涵盖4个降雨类别的降水量值。

"XRF计数率-比值-ppm（XRF Cps-Ratio-ppm）"工作表包含元素强度的XRF扫描数据、具有环境指示意义的元素比值及元素绝对浓度数据。

"富集因子与地质累积指数（EF & Igeo）"工作表提供了8种元素的富集因子（EF, enrichment factor）数据，包括样品元素/钛比值、背景值、EF值与地质累积指数（Igeo, geoaccumulation index）数据。