Jinho Ahn, Seoul National University, Seoul, Korea, Republic of (South), Giyoon Lee, Seoul National University, Seoul, South Korea, Syed Azharuddin, Birbal Sahni Institute of Palaeosciences, Geochemistry, Lucknow, India, Jaekyung Han, Seoul National University, School of Earth and Environmental Sciences, Seoul, South Korea, Dr. Ikumi Oyabu, National Institute of Polar Research, Tokyo, Japan, Julia Marks Peterson, Oregon State University, Corvallis, United States, Changhee Han, Yonsei University, Department of Earth System Sciences, Seoul, South Korea, Motohiro Hirabayashi, NIPR National Institute of Polar Research, Tokyo, Japan, Edward Brook, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States and Kenji Kawamura, Natl. Inst. of Polar Research, Tokyo, Japan