Dissolved thorium isotope concentrations in the South China Sea

This dataset contains depth-resolved thorium isotope data collected from the South China Sea during summer and winter sampling campaigns. The Excel file includes two worksheets (“summer” and “winter”), comprising 202 seawater samples from 15 stations distributed across 111.5–119°E and 11–20°N, with sampling depths ranging from 5 to 3700 m. The reported parameters include sampling depth, excess ^230Th concentration (^230Th_xs, fg kg^−1), dissolved ^232Th concentration (pg kg^−1), estimated thorium residence time (yr), and ^232Th-derived flux (μg m^−2 yr^−1). The dataset can be used to investigate the spatial, vertical, and seasonal variability of thorium in the South China Sea and to evaluate particle scavenging, thorium cycling, lateral transport, and atmospheric dust deposition. Derived residence-time and flux values are left blank for samples where the calculations were not applicable.本数据集包含夏季与冬季采样航次期间在南海采集的深度分辨钍同位素数据。该Excel文件包含两个工作表（"summer"与"winter"），涵盖15个站位的202份海水样品，站位分布于东经111.5°至119°、北纬11°至20°海域，采样深度范围为5米至3700米。所记录的参数包括采样深度、过剩²³⁰Th浓度（²³⁰Th_xs，fg kg⁻¹）、溶解态²³²Th浓度（pg kg⁻¹）、估算钍停留时间（单位：年）以及²³²Th衍生通量（μg m⁻² yr⁻¹）。本数据集可用于探究南海钍元素的空间、垂直及季节变化特征，同时可用于评估颗粒物清除、钍元素循环、侧向输运与大气粉尘沉降等过程。针对计算条件不适用的样品，其衍生的停留时间与通量数值留空。