Isotope studies of inner snow layers in a temperate region .

Reports that post-depositional change of isotope concentration was investigated in a temperate snow pack. Daily snow pit studies that were carried out at Moshiri, Hokkaido; Isotope analysis that was conducted on snow particles and the liquid water in between the particles, and on the precipitation and the runoff water (from the bottom of the snow pack) that collected during the observation period; Finding that the oxygen isotope concentration in the liquid part was smaller than the solid part of the wet snow; Difference between the isotope concentrations of the liquid and the solid that was low in the surface snow layer, but increased at the bottom; Results that suggested that isotope fractionation took place between the liquid and the solid, when liquid water (formed by melting at the snow surface layer) flowed groundwards.