Total organic carbon and total nitrogen (TOC and TN) concentration of the Northeast Greenland (NEG) shelf sediments from POLARSTERN cruise PS109

Samples for the assessment of total organic carbon and total nitrogen (TOC and TN) content in the sediment on the Northeast Greenland shelf have been collected with R/V Polarstern during PS109 between September and October 2017 using a camera-equipped multiple corer (TV-MUC; core area 0.007 m²). Upon arrival on deck, the upper 5 cm of three MUC cores were sliced into 1cm intervals, using a cut-off syringe, and then stored at -20°C. The samples were dried at 60°C, subsequently treated with hydrochloric acid in order to remove the inorganic carbon until the sediment was not bubbling anymore, and then dried again at 60°C. Finally, percent TOC and TN were determined using an ELTRA CS2000 Carbon Analyzer.

2017年9月至10月期间，在‘极星号’考察船（R/V Polarstern）执行PS109航次时，使用配备相机的多管取样器（TV-MUC；取样面积0.007平方米）采集了东北格陵兰陆架沉积物中总有机碳与总氮（TOC和TN）含量评估所需的样本。样本被带上甲板后，使用截切式注射器将三个多管取样器（MUC）岩心的顶部5厘米按1厘米间隔切片，随后在-20°C下保存。样本先于60°C下干燥，随后用盐酸处理以去除无机碳，直至沉积物不再冒泡，之后再次于60°C下干燥。最终，采用ELTRA CS2000碳分析仪测定了TOC与TN的百分比含量。