Hokkaido University, Faculty of Engineering, Division of Solid Waste, Resources and Geoenvironment Engineering: Drs. Tsubasa Otake, Yoko Ohtomo

Ibaraki University, Faculty of Science Geoenvironmental Science field: Dr. Ko Hashizume

Atmosphere and Ocean Research Institute, the University of Tokyo: Drs. Kotaro Shirai, Naoto Takahata, Yuya Tsukamoto

Nagoya University, Graduate School of Environmental Studies: Dr. Kenichiro Sugitani

Pennsylvania State University: Dr. Hiroshi Ohmoto,

Wisconsin University-Madison: Drs. John W. Valley, Noriko Kita, Kouki Kitajima

Norway Geological Survey: Dr. Aivo Lepland