2011 Fiscal Year Final Research Report
Study on the mechanisms of Grain boundary diffusion of polar ice
| Project/Area Number |
21340136
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | Nagaoka University of Technology |
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Principal Investigator |
AZUMA Nobuhiko 長岡技術科学大学, 工学部, 教授 (70182996)
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| Co-Investigator(Kenkyū-buntansha) |
ITO Yoshiro 長岡技術科学大学, 工学部, 教授 (60176378)
AKETAGAWA Masato 長岡技術科学大学, 工学部, 教授 (10231854)
TAKATA Morimasa 長岡技術科学大学, 工学部, 助教 (50377222)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 環境変動 / 極地 / 超精密計測 / 気候変動 / 氷床流動 |
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| Research Abstract |
Grain growth experiments performed using artificial ice and it was found that the activation energy for the grain boundary migration was 110. 120 kJ mol^<-1>, which is twice that for the self-diffusion of ice. An ice creep strain rate measurement system with an uncertainty of order less than 10-10 s-1 and a minimum measurement time of 10 min is developed. The ice specimen of interest is set in a cold cell, with a set-point temperature and maximum stability of-30 to-10℃and±20 mK or less, respectively. A modified phase modulation homodyne interferometer, the supporting material of which is ultralow-thermal-expansion glass, is combined with the system to measure the ice deformation with the resolution of nanometer scale or less.
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