EGU21-1020, updated on 10 Jan 2023
EGU General Assembly 2021
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Preliminary results for stratigraphy and chronology of blue ice in Larsen Glacier, East Antarctica

Giyoon Lee1, Jinho Ahn1, Hyeontae Ju2, Florian Ritterbusch3, Ikumi Oyabu4, Songyi Kim2, Kenji Kawamura4,5,6, Zheng-Tian Lu3, Sangyoung Han1, Sambit Ghosh1, Yeongcheol Han2, Sangbum Hong2, Changhee Han2, Soon Do Hur2, Wei Jiang3, and Guomin Yang3
Giyoon Lee et al.
  • 1Seoul National University, School of Earth and Environmental Sciences, Seoul, Republic of Korea (
  • 2Korea Polar Research Institute, Incheon, Republic of Korea
  • 3University of Science and Technology of China, Hefei, China
  • 4National Institute of Polar Research, Tachikawa, Japan
  • 5Department of Polar Science, School of Multidisciplinary Sciences The Graduate University for Advanced Studies, SOKENDAI, Tachikawa, Japan
  • 6Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan

Among the paleoclimate archives, we may take advantage of ice cores to directly measure greenhouse compositions of ancient air. Nevertheless, ice cores from deep drilling projects recover limited amount of ice for a given time period and hence limiting the studies that need an extensive amount of ice such as trace gas isotopes. In contrast, blue ice areas (BIAs) may provide a large amount of ancient ice outcropped at the surface. However, ice flow makes the blue ice stratigraphy complicated in many areas, and accordingly makes it difficult to reconstruct a continuous stratigraphy. Recently, the oldest ice was discovered at Allan Hills BIA (about 2.7 Ma). However, the stratigraphy is not continuous for the older part. Here we show preliminary results from Larsen Glacier, East Antarctica. The Ground Penetrating Radar (GPR) results show parallel ice layers near the surface with dips of 1-5° and indicate that the ice thickness ranges of 200–400 m. δDice of a vertical core sample matches well with that in the horizontally spaced surface ice samples. Greenhouse gas concentrations are significantly altered at shallow depths of < ~4.5 m. The δ18Oatm, CH4 concentration and stable isotopes of ice (δ18Oice, δDice) indicate that the Larsen BIA cover the Last Glacial Termination at the studied sites. 81Kr ages, corrected by 85Kr for the modern air contamination, are less than 54 ka, supporting the ages constrained by the other chemistry data.

How to cite: Lee, G., Ahn, J., Ju, H., Ritterbusch, F., Oyabu, I., Kim, S., Kawamura, K., Lu, Z.-T., Han, S., Ghosh, S., Han, Y., Hong, S., Han, C., Hur, S. D., Jiang, W., and Yang, G.: Preliminary results for stratigraphy and chronology of blue ice in Larsen Glacier, East Antarctica, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-1020,, 2021.

Corresponding displays formerly uploaded have been withdrawn.