Institute of Low Temperature Science, Hokkaido University/Nagaoka University of Technology/Institute of Low Temperature Science, Hokkaido University/Institute of Low Temperature Science, Hokkaido University/Institute of Low Temperature Science, Hokkaido University/Institute of Low Temperature Science, Hokkaido University/Nagaoka National College of Technology/Kitami Institute of Technology/National Institute of Polar Research
抄録(英)
Dating of ice cores is of important but is difficult for an ice core where there is low snow accumulation, and also for the deep part because seasonal chemical and isotopic signals are not easily preserved due to vapor migration after snow deposition and molecular diffusion in the deep part of ice sheet. In this paper, an attempt to reveal annual layer thickness is conducted on the basis of precise number density measurement of air bubbles and air hydrates. The annual layer thickness from air bubbles and hydrates agrees well with a calculated value within 10-15% at all depths of the 2500 m deep core. The obtained thickness in the interglacial period according to Eemian period in the Greenland ice core was half of the calculated value.
雑誌書誌ID
AA00733561
雑誌名
Memoirs of National Institute of Polar Research. Special issue
Estimation of annual layer thickness from stratigraphical analysis of Dome Fuji deep ice core
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KJ00000011445
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概要
