Carbonate chemistry analyses (total alkalinity, DIC, and d13C of DIC) from discrete bottle samples and CTD data from 12 stations sampled during R/V Endeavor cruise EN669 in the Gulf of Maine during August 2021

This dataset includes seawater properties observed during cruise EN669 on the R/V Endeavor in the Gulf of Maine, conducted in August 2021 by PI Katherine Allen and the shipboard science party. Included are data from twelve CTD/Niskin rosette casts at twelve different stations accompanied by carbonate chemistry analyses (total alkalinity, DIC, and d13C of DIC) from discrete bottle samples collected during each cast. Bottle samples were analyzed by Adam Subhas at the Woods Hole Oceanographic Institution after the cruise was complete. Data from CTD casts were collected by the Endeavor's shipboard scientific party. These Gulf of Maine seawater observations provide constraints on growth conditions of synchronously collected foraminifera, enabling geochemical paleo-proxies to be assessed and refined for regional paleoceanographic reconstructions.本数据集涵盖2021年8月由首席研究员（Principal Investigator, PI）凯瑟琳·艾伦（Katherine Allen）与奋进号研究船（R/V Endeavor）的船载科学团队于缅因湾（Gulf of Maine）开展的EN669航次中观测获取的海水理化性质数据。本次航次共在12个不同站位开展温盐深剖面仪（Conductivity, Temperature, Depth, CTD）与尼斯金采水器（Niskin rosette）阵列的布放取样作业，获取12组站位数据；同时针对每个站位取样获得的离散瓶样开展碳酸盐化学分析，分析指标包括总碱度、溶解无机碳（Dissolved Inorganic Carbon, DIC）以及溶解无机碳的碳同位素δ¹³C。航次结束后，离散瓶样的分析工作由伍兹霍尔海洋研究所（Woods Hole Oceanographic Institution）的亚当·苏巴斯（Adam Subhas）完成。温盐深剖面仪的剖面数据由奋进号研究船的船载科学团队采集。上述缅因湾海水观测数据可为同期采集的有孔虫（foraminifera）的生长环境提供约束条件，助力地球化学古环境代用指标的评估与优化，为区域古海洋学重建工作提供支撑。