Water-ice characteristics of five cores from a terrestrial permafrost area in northeastern Siberia

Water/ice content was derived from weight differences before and after freeze-drying the samples. Water isotope ratios (δ18O, δ2H, d excess), pH, conductivity and DOC were measured using pore water extracted from the sediment samples using Rhizone samplers. Water isotopes were measured at AWI Potsdam Stable Isotope Laboratory using a Finnigan MAT Delta-S mass spectrometer. DOC was measured at AWI Potsdam Hydrochemistry Laboratory using a Shimadzu TOC-V CPH Total Organic Carbon Analyzer.

样品的水/冰含量通过冷冻干燥前后的重量差值计算得出。利用根际采样器（Rhizone samplers）从沉积物样品中提取孔隙水后，对该孔隙水的水同位素比值（δ¹⁸O、δ²H、氘过量参数d excess）、pH值、电导率以及溶解性有机碳（Dissolved Organic Carbon, DOC）开展了测定。水同位素的检测工作在波茨坦AWI稳定同位素实验室完成，使用菲尼根MAT Delta-S型质谱仪进行分析。溶解性有机碳（DOC）的测定则在波茨坦AWI水化学实验室开展，采用岛津（Shimadzu）TOC-V CPH总有机碳分析仪完成检测。