Sulfate anomaly (dissolved) measurements of marine sediment from Long Core Expedition KN195-03

Abstract: The KN195-03 research cruise on board the R/V Knorr (Chief scientist Steven D’Hondt) took place in January-February 2009 and had as primary objective to test and refine quantitative models for the magnitude and geographic distribution of subseafloor biomass and organic-fueled subseafloor respiration. Sediment cores were taken at thirteen sites across the equatorial Pacific and the North Pacific Gyre. Knowledge of the chemical composition of the porewater throughout the collected cores is fundamental to answer the driving research questions of this scientific expedition. The shipboard geochemistry laboratory generated interstitial waters by squeezing 597 individual samples, and by extracting an additional 153 solutions by Rhizon sampling. Due to the time needed to analyze this very high number of samples, not all were analyzed for each dissolved constituent. We present here the shipboard porewater sulfate anomaly dataset (from which dissolved sulfate can be calculated) measured by ion chromatography.摘要：KN195-03号科考航次由R/V努诺号（R/V Knorr）执行，首席科学家为史蒂文·德翁特（Steven D’Hondt），于2009年1月至2月开展。本次航次的核心目标为验证并优化关于海底下生物质丰度与地理分布、以及有机燃料驱动的海底呼吸作用的定量模型。研究团队在赤道太平洋与北太平洋环流区的13个站位采集了沉积物岩芯。明确所采集岩芯中孔隙水的化学成分，是解答本次科考核心研究问题的基础。本次航次的船上地球化学实验室通过挤压597个独立样品获取孔隙水，并通过Rhizon采样（Rhizon sampling）法额外提取了153份溶液。由于分析海量样品需要耗费大量时间，并非所有溶解组分都完成了对应检测。本文公开了通过离子色谱法（ion chromatography）测定的船上孔隙水硫酸盐异常数据集（可由此计算溶解态硫酸盐含量）。