Japan Geoscience Union Meeting 2018

Presentation information

[JJ] Evening Poster

H (Human Geosciences) » H-TT Technology & Techniques

[H-TT18] Development and applications of environmental traceability methods

Tue. May 22, 2018 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall7, Makuhari Messe)

convener:Ichiro Tayasu(Research Institute for Humanity and Nature), Takanori Nakano(Research Institute for Humanity and Nature, Inter-University Research Institute Corporation National Institutes for the Humanities), Keisuke Koba(京都大学生態学研究センター)

[HTT18-P02] Seasonal precipitation isotope variability in the northern Nobi Plain, central Japan

Nami Oomiya1, *Maki Morimoto1 (1.Gifu University)

Keywords: precipitation, hydrogen isotope ratio, oxygen isotope ratio, Nobi Plain

The weekly isotopic compositions of precipitation in the northern Nobi Plain, central Japan have been investigated in the period from August 2016 to the present. Rain gauges were installed at five observation sites along the 4 km east-west survey line from Gifu university to Mt. Kinka, (329 meters msl) in Gifu city. The weekly precipitation and their hydrogen and oxygen isotope ratios obtained show clear seasonal variations, and especially in March and October, d-excess values changed significantly. Weekly horizontal distribution patterns of precipitation were classified by their characteristics and the weather conditions. The vertical isotopic gradients are slightly different between east and west slopes of Mt. Kinka, and this suggests that those differences are related to seasonal changes of wind directions and rain-producing clouds.