1. Division of Polar Ocean Sciences; Korea Polar Research Institute; Songdo Incheon 406-840 South Korea
2. Department of Earth Sciences; Brock University; St. Catharines Ontario L2S 3A1 Canada
3. Unit of Arctic Sea-Ice Prediction; Korea Polar Research Institute; Songdo Incheon 406-840 South Korea
4. Division of Polar Paleoenvironment; Korea Polar Research Institute; Songdo Incheon 406-840 South Korea
5. Division of Polar Life Sciences; Korea Polar Research Institute; Songdo Incheon 406-840 South Korea