D4 continuous ice core chemistry measurements below pore closeoff

Archived samples below the pore close off depth in the west-central Greenland D4 ice core were analyzed for a broad range of elements, chemical species, isotopes, and selected gases with the DRI/OSU continuous ice core analytical system largely to investigate the impact of site characteristics (accumulation rate, temperature, elevation, locations, surface melt history, impurity concentrations) on the fidelity of Greenland ice core gas (methane and carbon monoxide) records. Included are measurements from ~63 m depth to the bottom at ~145.4 m.

格陵兰岛中西部D4冰芯中孔隙封闭深度（pore close off depth）以下的存档冰样，采用DRI/OSU连续冰芯分析系统（continuous ice core analytical system），针对多种元素、化学组分、同位素及选定气体开展了分析，主要用于探究采样点特征（site characteristics，包括积累速率（accumulation rate）、温度、海拔、位置、表面融化历史（surface melt history）与杂质浓度（impurity concentrations））对格陵兰冰芯气体（甲烷（methane）与一氧化碳（carbon monoxide））记录保真度（fidelity）的影响。本次分析涵盖了从约63米深度至约145.4米冰芯底部的全部测量数据。