3:40 PM - 3:55 PM
Yuriko KOIKE1, *Jun ASANUMA2, G. DAVAA3 (1.Graduate school of Life and Environmental Sciences, University of Tsukuba, Japan, 2.Center for Research in Isotopes and Environmental Dtnamics, University of Tsukuba, Japan, 3.National Agency for Monitoring for Environment and Meteorology, Mongolia)