Eclipse Icefield (Yukon, Canada) June 2023 firn core stratigraphy, density, and borehole temperatures

This dataset contains measurements pertaining to three firn cores recovered from Eclipse Icefield (Yukon, Canada) June 2-4, 2023. Cores B501 and B502 were drilled from the surface to depths of 16.2 and 10.9 meters (m), respectively, at 60.844 degrees north (°N), 139.851 degrees west (°W), 0.6m apart from each other, to assess the small-scale spatial variability of near-surface melt features. Core B201 was drilled from the surface to 14.7m depth at 60.835°N, 139.830°W (at a similar elevation ~1.5 kilometers to the southeast). Cores B501 and B502 were drilled in one night over the course of 5 hours (h); core B201 was drilled the following night. The purpose of these data is to characterize the firn at Eclipse Icefield, specifically in terms of its alteration via melting. In particular, this dataset contains density measured in one of the three cores, borehole temperatures from two of the three boreholes, and stratigraphy recorded for all three cores.

本数据集涵盖2023年6月2日至4日从加拿大育空地区日食冰原（Eclipse Icefield）采集的三根粒雪芯（firn core）的相关测量数据。其中，B501与B502号粒雪芯于北纬60.844°、西经139.851°处钻取，两孔间距0.6米，钻取深度分别为16.2米与10.9米，本次采样旨在评估近地表融蚀特征的小尺度空间变异性。B201号粒雪芯则于北纬60.835°、西经139.830°处钻取，该点位位于前两孔东南方向约1.5公里处，海拔高度相近，钻取深度为14.7米。B501与B502号粒雪芯在一夜内耗时5小时完成钻取，B201号粒雪芯则于次日夜间完成钻取。本数据集的研究目标为表征日食冰原的粒雪特征，尤其是其因融蚀作用产生的改造情况。具体而言，本数据集包含三根粒雪芯中一根的密度测量数据、三个钻孔中两个的孔内温度数据，以及全部三根粒雪芯的地层序列记录。