GISP2 Ions: Deep (D) Core

Ion data set produced by the Glacier Research Group for the GISP2 D core, from 2 - 3040 m. 2 to 96 m is B core data. The remainder of data is from D core. D core samples were mechanically cleaned between 96-710m and 1370-1510m. All other samples were melted using a teflon coated aluminium apparatus which melted the center portion from a 3.5x3.5cm section of ice.本数据集为冰川研究小组（Glacier Research Group）为格陵兰冰芯项目2（GISP2）的D冰芯制作的离子数据集，数据覆盖深度范围为2至3040米。其中深度2至96米的数据取自B冰芯，其余数据均来自D冰芯。在96米至710米以及1370米至1510米的深度区间内，D冰芯样品采用机械清洁法进行处理；其余所有样品均使用聚四氟乙烯（Teflon）涂层铝制融样装置进行融样，该装置仅融化3.5厘米×3.5厘米截面冰样的中心部分。