Measurements of molecular hydrogen (H2), neon (Ne), and methane (CH4) in a shallow ice core drilled at Summit, Greenland during June and July of 2024

The goal of this study was to measure in situ hydrogen gas (H2) and neon (Ne) levels in a shallow ice core drilled at Summit, Greenland in the summer of 2024. To prevent post-coring exchange with the atmosphere, samples were extracted and analyzed on site as described in Saltzman et al. (2025) and Patterson et al. (2025). Additionally, several samples were extracted in the field and stored in glass flasks for later analysis at the University of California, Irvine (UCI) ice core laboratory. Methane (CH4) levels in the ice core were measured at the Oregon State University ice core laboratory in order to develop an age scale for the ice core. This dataset contains 1) H2 measurements 2) Ne measurements 3) CH4 measurements Each file contains the mean depth and assigned gas age as described in Patterson et al. (2025).

本研究旨在对2024年夏季于格陵兰岛萨米特（Summit）钻取的浅冰芯开展原位氢气（H₂）与氖气（Ne）浓度测定。为避免取芯后样品与大气发生气体交换，研究团队按照Saltzman等人（2025）与Patterson等人（2025）所述方法，现场完成样品提取与分析工作。此外，部分野外提取的样品被封存于玻璃烧瓶中，后续将在加州大学欧文分校（University of California, Irvine, UCI）冰芯实验室开展分析。本研究还在俄勒冈州立大学冰芯实验室测定了该冰芯内的甲烷（CH₄）浓度，以此构建该冰芯的年代标尺。本数据集包含三类数据：1）氢气浓度测定结果；2）氖气浓度测定结果；3）甲烷浓度测定结果。每个数据文件均包含平均深度与指定气体年代信息，具体方法参见Patterson等人（2025）所述内容。