The global database of deep-time marine nitrogen isotope data

Stable nitrogen isotope records preserved in marine sediments provide critical insights into Earth’s climate history and biospheric evolution. Here, the DSMS-NI database provides a comprehensive global compilation of nitrogen isotope (δ15N) data and associated geochemical parameters, spanning a vast collection of sediment samples dating from the Recent to the Archean. This database encompasses approximately 70,000 δ15N entries, complemented by extensive metadata, including precise temporal, spatial, lithological, metamorphic grade, and depositional environment information. By integrating data on total organic carbon (TOC), total nitrogen (TN), and organic carbon isotopes (δ13Corg), as well as major and trace elements and iron species, users can evaluate sample fidelity and factors influencing δ15N signatures.保存在海洋沉积物中的稳定氮同位素记录，可为地球气候历史与生物圈演化提供关键科学认知。本次发布的DSMS-NI数据库（DSMS-NI database），系统性汇编了全球范围内的氮同位素（δ15N）数据及配套地球化学参数，其覆盖的沉积物样品年代跨度从现代延伸至太古代。该数据库包含约70000条δ15N数据条目，并附带了丰富的元数据，涵盖精确的年代学信息、空间分布特征、岩性、变质程度以及沉积环境等内容。通过整合总有机碳（total organic carbon, TOC）、总氮（total nitrogen, TN）与有机碳同位素（δ13Corg）数据，以及常量元素、微量元素与铁物种信息，研究人员可评估样品保真度及影响δ15N信号的各类驱动因素。