From 10th June to 28th July 2023, Prof. ZHANG Nan from College of Construction Engineering and the Institute of Polar Science and Engineering of Jilin University was invited to participate in the Arctic site visit of the international cooperative expedition to Arctic Greenland "East Greenland Deep Ice Core Project" (EastGRIP) organized by the University of Copenhagen, Denmark, to participate in the implementation of deep ice and under-ice bedrock coring drilling in the Northeast Ice Stream, to conduct ice sample processing and borehole logging and to test the polar ice borehole logging instrument developed by Jilin University, the only Chinese organization invited. The main goal of this expedition work season is to drill through the ice cap and drill samples of basal warm ice, moraine and bedrock. After 30 days of drilling and sampling work, Professor ZHANG Nan and the team successfully drilled through the Greenland ice cap, with a final depth of 2658m, and drilled 2.8m samples of moraine and bedrock at the bottom of the ice cap, successfully completing the field mission, and returned to China on 28th July.

    The project started in 2015 and was organized by the University of Copenhagen in Denmark, with the participation of scientific research teams from many countries in the world, including China, Denmark, Germany, the United States, the United Kingdom, France, Switzerland, Norway, Russia, Japan, South Korea, Italy, etc. The main task is to drill continuous ice cores from the Northeast Greenland Ice Stream (NEGIS) to the ice-rock interface, and the ice cores and rock samples obtained from the drilling provide a series of important information for the research on the dynamics of the glaciers and the paleoclimatic studies on the changes of the global temperature and the concentration of greenhouse gases, etc.