EGRIP water isotope data 21.5 m (meters) to 2120.7 m depth at 10 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.

本数据集隶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。该项目通过钻探获取了东北格陵兰冰流（Northeast Greenland Ice Stream, NEGIS，北纬75.63°，西经35.98°）下方的冰芯。冰流是格陵兰冰盖（Greenland Ice Sheet, GIS）冰体大规模排泄的核心通道之一，本项目旨在获取冰流动力学的全新基础研究数据，以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提供了格陵兰冰盖东北部区域的古气候记录。本项目拥有众多国际合作伙伴，由丹麦冰与气候中心负责统筹管理，飞行保障作业由美国国家科学基金会极地项目办公室协调的、配备滑雪起降装置的大力神（Hercules）运输机提供支持。截至2022年5月，通过2017、2018及2019年的钻探作业，累计已获取约2099.2米的冰芯样品。本研究公开了冰芯深度21.5米至2120.7米区间内的氧、氢稳定同位素记录。经估算，基岩埋深约为2550米，剩余冰芯将在2022与2023年野外作业季完成采集。本次公开的数据产品受美国国家科学基金会资助项目“合作研究：末次冰期全格陵兰突发温度事件的指纹特征”（资助编号：1804098）支持。