Controls on Alkenone Carbon Isotope Fractionation in the Modern Ocean – Supporting Data

Here we present data from the article "Controls on Alkenone Carbon Isotope Fractionation in the Modern Ocean." This study explores carbon isotope fractionation in alkenone biomarkers (Ep37:2)––produced by Noelaerhabdaceae coccolithophores––that were recovered from modern suspended particulate organic matter and core-top/late Holocene sediments. We evaluate the influence of CO2, coccolithophore cell size, growth rate, and irradiance on Ep37:2 and test whether observations and quantitative relationships derived from laboratory cultures are applicable to the natural environment. This dataset contains two files. (1) A compilation of coretop and particulate alkenone carbon isotope measurements, as well as coretop alkenone carbon isotope data and coccolith size data generated in this study. This datafile also includes oceanographic data, metadata, and other derived parameters used to conduct the analyses in the study. (2) Estimates of biomass-weighted Noelaerhabdaceae coccolith length and cell radius from a compilation of core-top and water-column samples of Noelaerhabdaceae species abundance and coccolith size measurements. This dataset was used to generate estimates of coccolith length for samples in the alkenone carbon isotope compilation where no measurements were conducted or reported.本研究基于论文《现代海洋中烯酮碳同位素分馏的控制因素》中的数据展开。本研究聚焦于由诺氏颗石藻科（Noelaerhabdaceae）颗石藻（coccolithophore）产生的烯酮类生物标志物（alkenone biomarkers，Ep37:2）的碳同位素分馏现象，相关样品采自现代悬浮颗粒有机质与岩芯表层/晚全新世沉积物。本研究评估了二氧化碳浓度、颗石藻细胞尺寸、生长速率与辐照度对Ep37:2的影响，并检验了实验室培养体系中得到的观测结果与定量关系是否可推广至自然环境。本数据集包含两个文件：(1) 岩芯表层与颗粒态烯酮碳同位素测量数据汇编，以及本研究生成的岩芯表层烯酮碳同位素数据与颗石尺寸数据。该数据文件还包含本研究开展分析所需的海洋学数据、元数据（metadata）以及其他衍生参数。(2) 基于诺氏颗石藻科物种丰度与颗石尺寸测量数据的岩芯表层及水柱样品汇编，估算得到的生物量加权诺氏颗石藻科颗石长度与细胞半径。本数据集被用于生成烯酮碳同位素汇编中未开展或未报道测量的样品的颗石长度估算值。