*Urumu TSUNOGAI1, Sho MINAMI1, Hiroki SAKUMA1, Daisuke KOMATSU1, Fumiko NAKAGAWA2
(1.Graduate School of Environmental Studies, Nagoya University, 2.Faculty of Science, Hokkaido University)
Keywords:oligotrophic lake, mesotrophic lake, dissolved oxygen, triple oxygen isotopes, vertical profile, seasonal variation
In order to quantify the gross production rate of dissolved oxygen molecules (DO) in hydrosphere beneath thermocline, vertical distributions of the triple oxygen isotopic compositions of DO in oligotrophic/mesotrophic lakes were determined, together with their temporal variations.