Abstract. The shells of marine invertebrates can serve as high-resolution records of oceanographic and atmospheric change through time. In particular, oxygen and carbon isotope analyses of nearshore marine calcifiers that grow by accretion over their lifespans provide seasonal records of environmental and oceanographic conditions. Archaeological shell middens generated by Indigenous communities along the Northeast Pacific coast contain shells harvested over multiple seasons for millennia. These shell middens, as well as analyses of archival and modern shells, have the potential to provide multi-site, seasonal archives of nearshore conditions throughout the Holocene. A significant volume of oxygen and carbon isotope data from archaeological shells exists, yet is separately published in archaeological, geochemical, and paleoceanographic journals and has not been comprehensively analyzed to examine oceanographic change over time. Here, we compiled a database of previously published oxygen and carbon isotope data from archaeological, archival, and modern marine molluscs from the North American coast of the Northeast Pacific (32° N to 50° N). This database includes oxygen and carbon isotope data from over 550 modern, archaeological, and sub-fossil shells from 8880 years before present (BP) to the present, from which there are 4,845 total δ¹³C and 5,071 total δ¹⁸O measurements. Shell dating and sampling strategies vary among studies (1–118 samples per shell) and vary significantly by journal discipline. Data are from various bivalves and gastropod species, with Mytilus spp. being the most commonly analyzed taxon. This novel database can be used to investigate changes in nearshore sea surface conditions including warm-cool oscillations, heat waves, and upwelling intensity, and provides nearshore calcite δ¹³C and δ¹⁸O values that can be compared to the vast collections of offshore foraminifera calcite δ¹³C and δ¹⁸O data from marine sediment cores. By utilizing previously published geochemical data from midden and museum shells rather than sampling new specimens, future scientific research can reduce or omit the alteration or destruction of culturally valued specimens and sites. The data set is publicly available through PANGAEA at https://doi.org/10.1594/PANGAEA.932671 (Palmer et al., 2021).

中文翻译：

---

东北太平洋全新世近岸海洋软体动物贝壳地球化学数据库

摘要。海洋无脊椎动物的贝壳可以作为海洋和大气随时间变化的高分辨率记录。特别是，近岸海洋钙化物的氧和碳同位素分析提供了环境和海洋条件的季节性记录。东北太平洋沿岸原住民社区产生的考古贝壳中含有数千年来在多个季节收获的贝壳。这些贝壳堆以及对档案和现代贝壳的分析，有可能提供整个全新世近岸条件的多地点、季节性档案。存在大量来自考古贝壳的氧和碳同位素数据，但分别发表在考古、地球化学、和古海洋学期刊，尚未进行全面分析以检查海洋学随时间的变化。在这里，我们编制了一个数据库，其中包含来自东北太平洋北美海岸（北纬 32° 至 50°）的考古、档案和现代海洋软体动物的先前公布的氧和碳同位素数据。该数据库包括从 8880 年前 (BP) 到现在的 550 多个现代、考古和亚化石贝壳的氧和碳同位素数据，其中总共有 4,845 个 δ¹³ C 和 5,071 次总 δ ¹⁸ O 测量。贝壳测年和采样策略因研究而异（每个贝壳 1-118 个样本），并且因期刊学科而异。数据来自各种双壳类动物和腹足动物物种，Mytilus spp。是最常分析的分类单元。这个新颖的数据库可用于调查近岸海面条件的变化，包括暖冷振荡、热浪和上升流强度，并提供近岸方解石 δ ¹³ C 和 δ ¹⁸ O 值，可与大量的近海有孔虫进行比较方解石 δ ¹³ C 和 δ ¹⁸来自海洋沉积物岩心的 O 数据。通过利用先前公布的来自米登和博物馆贝壳的地球化学数据，而不是对新标本进行采样，未来的科学研究可以减少或省略具有文化价值的标本和遗址的改变或破坏。该数据集可通过 PANGEA 公开获取，网址为 https://doi.org/10.1594/PANGAEA.932671（Palmer 等，2021）。