Dome Fuji, Antarctica 1993 Shallow Core 1 cm Electrical Conductivity Measurements (ECM)

In 1993, the 34th wintering party of the Japanese Antarctic Research Expediton (JARE-34) conducted shallow core drilling at Dome Fuji Station, East Antarctica to make a pilot borehole for deep core drilling. Then, an ice core of 112.59 depth was recovered by electro-mechanical drill. The core was brought to the National Institute of Polar Research (NIPR: Tokyo). In 1995, core analysis was started to determine: (1) the recent circumstance of deposition process at Dome Fuji Station, and (2) the formation process of stratigraphic structure and its characteristics in a shallow layer. Chronology, chemical and physical properties are examined. The ECM signal was measured at DF 1250 V and about -15C. The data were corrected to values corresponding to -15C by use of the Arrhenius law for temperature dependence (Neftel, 1985). Density was also corrected for effects of firn density. Analogue ECM data were digitized at 1 mm intervals. After taking the moving average of 10 data, Data set was made at intervals of 1 cm.1993年，日本南极考察队第34次越冬分队（JARE-34）在南极东部富士穹顶站开展浅冰芯钻探作业，为后续深层冰芯钻探施工试验钻孔。随后使用机电式钻机获取了深度达112.59米的冰芯，该冰芯被运送至位于东京的国立极地研究所（National Institute of Polar Research, NIPR）。 1995年，研究团队启动冰芯分析工作，旨在实现两大目标：（1）明确富士穹顶站当前沉积过程的环境背景；（2）揭示浅层地层结构的形成过程及其特征。研究人员对冰芯的年代学、化学与物理性质进行了检测与分析。 电导率信号（ECM）在DF 1250 V电压、约-15℃的条件下完成测量；研究依据描述温度依赖性的阿伦尼乌斯定律（Arrhenius law，Neftel, 1985），将测量数据校正至对应-15℃时的数值。同时针对粒雪密度的影响，对冰芯密度进行了校正。 以1毫米的间隔对模拟ECM信号数据进行数字化处理，在对10组连续数据点进行移动平均处理后，最终以1厘米为间隔生成数据集。