IFREE, JAMSTEC, Natsushima-cho 2-15, Yokosuka 237-0061, Japan
K. Kuroki
CDEX, JAMSTEC, Yokohama Institute for Earth Science, 3173-25 Showa-machi, Kanazawa-ku, Yokohama 236-0001, Japan
T. Sugawara
Department of Marine Science, Marine Works Japan Ltd., c/o Kochi Institute for Core Sample Research, JAMSTEC, B200 Monobe, Nankoku Kochi 783-8502, Japan
K. Aoike
CDEX, JAMSTEC, c/o Kochi Institute for Core Sample Research, JAMSTEC, B200 Monobe, Nankoku Kochi 783-8502, Japan
K. Iijima
IFREE, JAMSTEC, Natsushima-cho 2-15, Yokosuka 237-0061, Japan
S. Sugisaki
Department of Polar Science, The Graduate University for Advanced Studies, c/o National Institute of Polar Research, 9-10, Kaga 1-chome, Itabashi-ku, Tokyo 173- 8515, Japan
