EGRIP water isotope data 21.5 m (meters) to 2120.7 m depth at 5 cm resolution, from continuous flow analysis (CFA).

This data set is part of a joint international effort for the East GReenland Ice-core Project (EGRIP), which has retrieved an ice core by drilling through the Northeast Greenland Ice Stream (NEGIS, 75.63°N (North), 35.98°W (West)). Ice streams are responsible for draining a significant fraction of the ice from the Greenland Ice Sheet (GIS), and the project was developed to gain new and fundamental information on ice stream dynamics, thereby improving the understanding of how ice streams will contribute to future sea-level change. The drilled core also provides a new record of past climatic conditions from the northeastern part of the GIS. The project has many international partners and is managed by the Centre for Ice and Climate, Denmark with air support carried out by US ski-equipped Hercules aircraft managed through the US (United States) Office of Polar Programs, National Science Foundation. As of May 2022, approximately 2099.2 m (meters) of ice core have been recovered from the combined efforts of drilling operations in 2017, 2018, and 2019. Here we present records of stable isotopes of oxygen and hydrogen from 21.5 meters to 2120.7 m depth. Bedrock is estimated to be at a depth of approximately 2550 m; the remaining ice is expected to be recovered in the 2022 and 2023 field seasons. The data product presented here is supported by the National Science Foundation project: Collaborative Research: The fingerprint of abrupt temperature events throughout Greenland during the last glacial period. Award # 1804098.

本数据集属于东格陵兰冰芯计划（East GReenland Ice-core Project, EGRIP）的国际联合研究项目的一部分。该计划通过在东北格陵兰冰流（Northeast Greenland Ice Stream, NEGIS，北纬75.63°，西经35.98°）处钻探获取了冰芯。冰流是格陵兰冰盖（Greenland Ice Sheet, GIS）中大量冰体向外排泄的主要通道，本项目旨在获取冰流动力学的全新基础研究数据，进而深化对冰流如何影响未来海平面变化的认知。本次钻探获取的冰芯同时也提供了格陵兰冰盖东北部地区过去气候环境演化的全新记录。该项目拥有众多国际合作方，由丹麦冰与气候中心负责统筹管理，航空保障任务由美国国家科学基金会极地项目办公室协调调度的配备滑雪式起落架的美国大力神（Hercules）运输机执行。截至2022年5月，通过2017、2018及2019年的多轮钻探作业，已累计获取约2099.2米的冰芯。本研究公开了21.5米至2120.7米深度段的氧与氢稳定同位素序列记录。经科学估算，基岩埋藏深度约为2550米，剩余未钻探的冰层预计将在2022和2023年的野外作业季中完成获取。本次公开的数据产品得到了美国国家科学基金会资助项目"合作研究：末次冰期全格陵兰地区极端温度事件的指纹特征"（资助编号：1804098）的支持。