12:36 PM - 12:39 PM
[AHW24-P07] Secular change of stable carbon isotopic ratio in groundwater samples during their storage in laboratory
3-min talk in an oral session
*Hiroshi TAKAHASHI1, Hiroko HANDA1, Masayo MINAMI2, Takafumi ARAMAKI3, Toshio NAKAMURA2 (1.Geological Survey of Japan, AIST, 2.Center for Chronological Research, Nagoya University, 3.National Institute for Environmental Studies)