Abstract. Marine sediments play a crucial role in the global carbon cycle by acting as the ultimate sink of both terrestrial and marine organic carbon. To understand the spatiotemporal variability in the content, sources and dynamics of organic carbon in marine sediments, a curated and harmonized database of organic carbon and associated parameters is needed, which has prompted the development of the Modern Ocean Sediment Archive and Inventory of Carbon (MOSAIC) database. We present here MOSAIC version 2.0, which has expanded the spatiotemporal coverage of the original database by ~400 %, and now holds data from more than 17000 individual sediment cores from different continental margins on a global scale. Additional variables have also been incorporated into MOSAIC v.2.0 that are crucial to interpret the distribution of the quantity, origin and age of organic carbon in marine sediments globally. Sedimentological parameters (e.g., grain size fractions, mineral surface area) help understand the effect of hydrodynamic sorting and mineral protection in the distribution of organic carbon, while molecular biomarker signatures (e.g., lignins phenols, fatty acids, alkanes) can constrain the origin of organic matter with a greater level of specificity. MOSAIC v.2.0 also stores data from analyses performed on specific sediment and molecular fractions, which provide further insight of the processes that affect the degradation and ageing of organic carbon in marine sediments. While data included within MOSAIC is not exhaustive, it is continuously expanding and version control will allow users to benefit from updated versions while ensuring reproducibility of their findings.

中文翻译：

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现代海洋沉积物档案和碳清单 (MOSAIC)：2.0 版

摘要。海洋沉积物作为陆地和海洋有机碳的最终汇，在全球碳循环中发挥着至关重要的作用。为了了解海洋沉积物中有机碳含量、来源和动态的时空变化，需要一个精心策划和协调的有机碳数据库和相关参数，这促使现代海洋沉积物档案和碳清单（MOSAIC）的发展) 数据库。我们在此展示 MOSAIC 2.0 版，它已将原始数据库的时空覆盖范围扩大了约 400%，现在拥有来自全球范围内不同大陆边缘的 17000 多个独立沉积岩心的数据。其他变量也已纳入 MOSAIC v.2.0 中，这些变量对于解释数量分布至关重要，全球海洋沉积物中有机碳的起源和年龄。沉积学参数（例如，粒度分数、矿物表面积）有助于了解水力分选和矿物保护对有机碳分布的影响，而分子生物标志物特征（例如，木质素酚类、脂肪酸、烷烃）可以限制有机碳的来源具有更高特异性的有机物质。MOSAIC v.2.0 还存储来自对特定沉积物和分子组分进行的分析的数据，这些数据可以进一步了解影响海洋沉积物中有机碳降解和老化的过程。虽然 MOSAIC 中包含的数据并不详尽，但它在不断扩展，版本控制将使用户能够从更新版本中受益，同时确保其发现的可重复性。