We present here a global oceanic compilation of ²³⁴Th measurements that collects results from researchers and laboratories over a period exceeding 50 years. The origin of the ²³⁴Th sampling in the ocean goes back to 1967, when Bhat et al. (1969) initially studied ²³⁴Th distribution relative to its parent ²³⁸U in the Indian Ocean. However, it was the seminal work of Buesseler et al. (1992) – which proposed an empirical method to estimate export fluxes from ²³⁴Th distributions – that drove the extensive use of the ²³⁴Th–²³⁸U radioactive pair to evaluate the organic carbon export out of the surface ocean by means of the biological carbon pump. Since then, a large number of ²³⁴Th depth profiles have been collected using a variety of sampling instruments and strategies that have changed during the past 50 years. The present compilation is made of a total 223 data sets: 214 from studies published in either articles in refereed journals, PhD theses, or repositories, as well as 9 unpublished data sets. The data were compiled from over 5000 locations spanning all the oceans for total ²³⁴Th profiles, dissolved and particulate ²³⁴Th activity concentrations (in dpm L⁻¹), and POC:²³⁴Th ratios (in µmol dpm⁻¹) from both sediment traps and filtration methods. A total of 379 oceanographic expeditions and more than 56 600 ²³⁴Th data points have been gathered in a single open-access, long-term, and dynamic repository. This paper introduces the dataset along with informative and descriptive graphics. Appropriate metadata have been compiled, including geographic location, date, and sample depth, among others. When available, we also include water temperature, salinity, ²³⁸U data (over 18 200 data points), and particulate organic nitrogen data. Data source and method information (including ²³⁸U and ²³⁴Th) is also detailed along with valuable information for future data analysis such as bloom stage and steady-/non-steady-state conditions at the sampling moment. The data are archived on the PANGAEA repository, with the dataset DOI https://doi.org/10.1594/PANGAEA.918125 (Ceballos-Romero et al., 2021). This provides a valuable resource to better understand and quantify how the contemporary oceanic carbon uptake functions and how it will change in future.

中文翻译：

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重温 50 年的 234Th 数据：全面的全球海洋汇编

^{我们在此展示了234} Th 测量值的全球海洋汇编，该汇编从研究人员和实验室收集了超过 50 年的结果。^海洋中234 Th 采样的起源可以追溯到 1967 年，当时 Bhat 等人。(1969) 最初研究了印度洋中²³⁴ Th 相对于其母体 ^{238 U 的分布。}然而，这是 Buesseler 等人的开创性工作。(1992) – 提出了一种经验方法来估计来自²³⁴ Th 分布的出口通量 – 这推动了²³⁴ Th - ^{238的广泛使用}U 放射性对通过生物碳泵评估表层海洋中的有机碳输出。从那时起，使用在过去 50 年中发生变化的各种采样仪器和策略收集了大量 ^{234 Th 深度剖面。}本汇编由总共 223 个数据集组成：其中 214 个来自发表在参考期刊、博士论文或知识库的文章中的研究，以及 9 个未发表的数据集。这些数据是从跨越所有海洋的 5000 多个地点汇编的，包括总²³⁴ Th 剖面、溶解和颗粒²³⁴ Th 活动浓度（以 dpm L ^-1为单位）和POC：²³⁴ Th比率（以µmol dpm ^-1 ) 来自沉淀物捕集器和过滤方法。总共 379 次海洋考察和超过 56 600 ²³⁴个 Th 数据点已收集在一个开放访问、长期和动态的存储库中。本文介绍了数据集以及信息丰富的描述性图形。已经编译了适当的元数据，包括地理位置、日期和样本深度等。如果可用，我们还包括水温、盐度、²³⁸ U 数据（超过 18 200 个数据点）和颗粒有机氮数据。数据来源和方法信息（包括²³⁸ U 和²³⁴Th) 还详细说明了未来数据分析的有价值信息，例如采样时刻的开花阶段和稳态/非稳态条件。数据存档在 PANGEA 存储库中，数据集 DOI https://doi.org/10.1594/PANGAEA.918125 (Ceballos-Romero et al., 2021)。这为更好地理解和量化当代海洋碳吸收的功能以及未来将如何变化提供了宝贵的资源。