GROWTH PROCESS OF AIR-HYDRATES AND DIFFUSION OF AIR MOLECULES IN DEEP ICE SHEET

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概要

• 論文の詳細を見る

• Geometrical parameters of air-hydrate crystals in Vostok ice cores revealed that air-hydrate crystals were growing in the deep ice sheet. Air-hydrate crystals with radius of 65 to 100μm grew while smaller crystals dis-appeared. Moreover, the smaller the crystal was, the quicker its number concen-tration decreased. A growth model of air-hydrate crystals in ice sheets was developed by assuming the spherical diffusion field of gas molecules and their steady state diffusions. The model with the given geometrical parameters gave an estimate that the product of the diffusion coefficient and equilibrium concen-tration of gas molecules in ice is of order 10^<-19> m^2 s^<-1> under the conditions of the deep ice sheet. This estimate is reasonable if the concentration of gas molecules in ice is assumed to be the same as that of self-interstitial of ice. The results indicate that gas molecules could diffuse several tens of centimeters during 100 kyr.

• 国立極地研究所の論文

著者

• Mae Shinji

  Department of Applied Physics, Hokkaido University

• Morimoto S

  National Institute Of Polar Research Organization Of Information And Systems

• Morimoto Shinji

  National Institute of Polar Research

• Morimoto S

  National Inst. Polar Res. Tokyo Jpn

• Uchida T

  Hokkaido National Industrial Research Institute

• Mae S

  National Institute Of Polar Research Research Organization Of Information And Systems

• HONDOH Takeo

  The Institute of Low Temperature Science, Hokkaido University

• UCHIDA Tsutomu

  Hokkaido National Industrial Research Institute

• LIPENKOV Vladimir

  Laboratoire de Glaciologie et Geophysique de l' Environnement

• DUVAL Paul

  The Arctic and Antarctic Research Institute

• KAWABATA Junichi

  Hokkaido National Industrial Research Institute

• Lipenkov Volodya

  The Arctic and Antarctic Research Institute

• Mae Shinji

  Department Of Applied Physics Hokkaido University

• Mae Shinji

  Department Of Applied Physics Faculty Of Engineering Hokkaido University

• Duval Paul

  Laboratoire De Glaciologie Et Geophysique De L'environnement

• Mae S

  Hokkaido Univ. Sapporo

• Hondoh Takeo

  The Institute Of Low Temperature Science Hokkaido University

• Hondoh T

  Hokkaido Univ. Hokkaido Jpn

• Kawabata Junichi

  Hokkaido Institute Of Public Health

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