Pore water macronutrient data from Greenland margin and the Labrador Sea

The dataset contains pore water macronutrient (nitrate+nitrite, nitrite, ammonium, phosphate) concentration measurements, obtained from seven sediment cores collected from the Greenland margin and the Labrador Sea. Porewaters were extracted from the sediment cores using Rhizon samplers and frozen for transport. The frozen samples were thawed according to GoSHIP protocols and analysed for inorganic macronutrients using a SEAL analytical AAIII segmented flow colorimetric auto-analyser. Seawater nutrient reference materials (KANSO Ltd. Japan) were also analysed to check analyser performance and to guarantee the quality control of the final reported data. The typical uncertainty of the analytical results were between 2-3%, and the limits of detection for nitrate and phosphate were 0.02 mmol/m3, and 0.01 mmol/m3 for nitrite. For full methods and analytical quality control, see Hendry et al., 2019. The samples were collected as part of the European Research Council project ICY-LAB (ERC-2015-STG grant agreement number 678371).

本数据集涵盖孔隙水常量营养盐（硝酸盐+亚硝酸盐、亚硝酸盐、铵盐、磷酸盐）的浓度测量数据，数据采自格陵兰陆缘与拉布拉多海获取的7根沉积岩芯。孔隙水通过Rhizon采样器从沉积岩芯中提取，经冷冻保存以用于运输。冷冻保存的样品按照GoSHIP规程进行解冻，随后采用SEAL AAIII型分段流动比色自动分析仪对无机常量营养盐进行分析。同时还分析了日本KANSO有限公司生产的海水营养盐标准参考物质，以校验分析仪的运行性能，并保障最终发布数据的质量控制。分析结果的典型不确定度介于2%至3%之间；硝酸盐与磷酸盐的检出限为0.02 mmol/m³，亚硝酸盐的检出限为0.01 mmol/m³。完整的实验方法与分析质控流程详见Hendry等人2019年的研究成果。本数据集的样品采集工作隶属于欧洲研究理事会ICY-LAB项目（资助协议编号：ERC-2015-STG 678371）。