Beskrivelse
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 (United States) ski-equipped Hercules aircraft managed through the US Office of Polar Programs, National Science Foundation. Here we present high-resolution water-isotope data (oxygen and hydrogen isotopes) measured at 1 millimeter (mm) resolution and placed on an age scale for the last ~49.9 ka b2k (thousands of years before 2000 Common Era (CE)) according to the Greenland Ice Core Chronology (GICC05). Records of delta-D (hydrogen isotopes) and delta-18O (oxygen isotopes) were measured using a semi-automated continuous flow analysis (CFA) system in conjunction with a Picarro cavity ring-down laser spectrometer (CRDS; model L2130-i). EGRIP water isotope data 21.5 m (meters) to 2120.7 m depth at 10 centimeter (cm) resolution from CFA can be found at Arctic Data Center doi:10.18739/A2CC0TV6D, and at 5 cm resolution: doi:10.18739/A2H41JP05. 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.
| Dato for tilgængelighed | 2024 |
|---|---|
| Forlag | NSF Arctic Data Center |