1. Department of Earth & Environmental Sciences Chungbuk National University Cheongju 28644 Korea
2. Université Lyon 1 & CNRS UMR 5023 7 rue Dubois F69622 Villeurbanne France
3. Department of Palaeobiology Swedish Museum of Natural History Box 50007 S‐104 05 Stockholm Sweden
4. Division of Polar Earth‐System Sciences Korea Polar Research Institute Incheon 21990 Korea
5. Instituto Antártico Chileno (INACH) Plaza Muñoz Gamero 1055 Punta Arenas Chile
6. Facultad de Ciencias Agronómicas Casilla 1004 Universidad Chile Santiago Chile
7. Division of Polar Life Sciences Korea Polar Research Institute Incheon 21990 Korea