Abstract. Stable water isotopes stored in snow, firn and ice are used to reconstruct climatic parameters. The imprint of these parameters at the snow surface and their preservation in the upper snowpack are determined by a number of processes influencing the recording of the environmental signal. Here, we present a dataset of approximately 3800 snow samples analysed for their stable water isotope composition, which were obtained during the summer season next to the deep drilling site of the East Greenland Ice Core Project in northeast Greenland (75.635411° N, 36.000250° W). Sampling was carried out every third day between 14 May and 3 August 2018 along a 39 m long transect. Three depth intervals in the top 10 cm were sampled at 30 positions with a higher resolution closer to the surface (0–1 and 1–4 cm depth vs. 4–10 cm). The sample analysis was carried out at two renowned stable water isotope laboratories that produced isotope data with the overall highest uncertainty of 0.09 ‰ for δ18O and 0.8 ‰ for δD. This unique dataset shows the strongest δ18O variability closest to the surface, damped and delayed variations in the lowest layer, and a trend towards increasing homogeneity towards the end of the season, especially in the deepest layer. Additional information on the snow height and its temporal changes suggests a non-uniform spatial imprint of the seasonal climatic information in this area, potentially following the stratigraphic noise of the surface. The data can be used to study the relation between snow height (changes) and the imprint and preservation of the isotopic composition at a site with 10–14 cm w.e. yr−1 accumulation. The high-temporal-resolution sampling allows additional analyses on (post-)depositional processes, such as vapour–snow exchange. The data can be accessed at https://doi.org/10.1594/PANGAEA.956626 (Zuhr et al., 2023a).

中文翻译：

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格陵兰岛东北部 EastGRIP 营地上层积雪的时空稳定水同位素数据，于 2018 年夏季采样

摘要。储存在雪、冷杉和冰中的稳定水同位素用于重建气候参数。这些参数在雪表面的印记及其在上层积雪中的保存是由影响环境信号记录的许多过程决定的。在这里，我们提供了约 3800 个雪样本的数据集，分析了其稳定水同位素组成，这些样本是在夏季格陵兰岛东北部东格陵兰冰芯项目深钻现场附近（北纬 75.635411°，西经 36.000250°）获得的。 ）。 2018年5月14日至8月3日期间，每三天沿一条39 m长的横断面进行采样。在靠近表面的 30 个位置以更高分辨率对顶部 10 厘米的三个深度间隔进行采样（0-1 和 1-4 厘米深度与 4-10 厘米深度）。样品分析是在两个著名的稳定水同位素实验室进行的，所产生的同位素数据总体最高不确定度为 δ18O 0.09 ‰ 和 δD 0.8 ‰。这个独特的数据集显示了最接近地表的最强 δ18O 变化、最底层的阻尼和延迟变化，以及在季节结束时均匀性增加的趋势，特别是在最深层。关于雪高及其时间变化的附加信息表明，该地区季节性气候信息的空间印记不均匀，可能遵循地表的地层噪声。这些数据可用于研究积雪高度（变化）与 10-14 cm we yr−1 积累地点的同位素组成的印记和保存之间的关系。高时间分辨率采样允许对（后）沉积过程进行额外分析，例如汽雪交换。数据可通过 https://doi.org/10.1594/PANGAEA.956626 访问（Zuhr 等人，2023a）。