ice flow is as small as possible, whereas the latest East GRIP research is conducted upstream of the North East Greenland Ice Stream. This is the largest active ice stream in Greenland, and EastGRIP takes a different perspective from the previous GRIP. In addition, the depth of ice that corresponds to the warm period of the early Holocene of the conventional Greenland ice core had the characteristic of being extremely fragile. Due to the influence of its characteristics, it was almost impossible for conventional Greenland ice cores to collect highly accurate chemical analysis data and gas analysis data with high time resolution. As a result of considering this difficulty, EastGRIP has installed a cold temperature chamber to keep the drilled ice below -30 °C immediately after the drilling, and efforts were made to minimize the destruction of ice cores by eliminating small steps of several tens of microns in the core field processing. The cold air prevents the expansion of air bubbles and prevents the ice from breaking. As a result, ice cores capable of continuous flow analysis have been acquired even from fragile depth zones, and it is expected that more detailed and accurate chemical analysis and gas analysis data will be acquired in the future. Other ice core projects East Greenland Ice-core Project (EastGRIP) WAIS Divide Ice Core Project DYE3 Camp Century South Pole Ice Core Project Arctic Ice Core Project See also Climatology Dansgaard-Oeschger event European Project for Ice Coring in Antarctica GISP Ice core Sources Alley, RB, Andrews, J., Brigham-Grette, J, Clarke, GK., Cuffey, K., Fitzpatrick, J., Funder, S, Marshall, S., Miller, G., Mitrovica, J., Muhs, D., Otto-Bliesner, B., Polyak, L, & White, JW., (2010). ‘History of the Greenland Ice Sheet: paleoclimatic insights’, Quaternary Science Reviews, vol. 29, no. 15, pp. 1728–1756, doi: 10.1016/j.quascirev.2010.02.007. Anklin, J., Barnola, J., Beer, T., Blunier, J., Chappellaz, H., Clausen, D., … Thorsteinsson, W. (1993). Climate instability during the last interglacial period recorded in the Greenland Ice-core Project. Nature (London), 364(6434), 203–207. Arctic Challenge of Sustainability. (2017). ‘Deep ice coring under the EGRIP in 2017’. Arctic Challenge for Sustainability Project. Retrieved from https://www.nipr.ac.jp/arcs/blog/en/2017/12/EGRIP2017-2.html Christ, Bierman, P. R., Schaefer, J. M., Dahl-Jensen, D., Steffensen, J. P., Corbett, L. B., Peteet, D. M., Thomas, E. K., Steig, E. J., Rittenour, T. M., Tison, J.-L., Blard, P.-H., Perdrial, N., Dethier, D. P., Lini, A., Hidy, A. J., Caffee, M. W., & Southon, J. (2021).