Study on the mechanisms of Grain boundary diffusion of polar ice

极地冰晶界扩散机制研究

• 批准号: 21340136
• 负责人: AZUMA Nobuhiko
• 金额: $ 11.81万
• 依托单位: Nagaoka University of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21340136/
• 关键词: 環境変動; 極地; 超精密計測; 気候変動; 氷床流動; 立相変調ホモダイン干渉計; 氷のクリープ; 粒界拡散; 位相変調ホモダイン干渉計

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.

使用人造冰进行的谷物生长实验，发现晶界迁移的活化能为110。120kJ mol^<-1>，这是冰的自扩散的两倍。冰淇淋应变速率测量系统的不确定性小于10-10 S-1，最小测量时间为10分钟。感兴趣的冰样品设置在冷单元中，其设定温度和最高稳定性分别为-30 to-10℃和±20 mk或更少。修改的相位调制型同源干涉仪，其支持材料是超高的膨胀玻璃，与系统结合使用，以通过纳米尺度的分辨率或更少的分辨率测量冰变形。

项目成果

レーザー干渉測長法による氷の微小変位計測技術の開発IV

激光干涉法冰微位移测量技术开发IV

• 发表时间: 2009
• 作者: 菅原亮太;他7名
• 通讯作者: 他7名

Subgrain boundaries in Antarctic ice quantified by X-ray Laue diffraction

• DOI: 10.3189/002214311795306628
• 发表时间: 2011-03
• 期刊: Journal of Glaciology
• 影响因子: 3.4
• 作者: I. Weikusat;A. Miyamoto;S. H. Faria;S. Kipfstuhl;N. Azuma;T. Hondoh

Impeding effect of air bubbles on normal grain growth of ice

气泡对冰晶正常生长的阻碍作用

• 发表时间: 2012
• 期刊: Journal of Structural Geology
• 影响因子: 3.1
• 作者: N. Azuma;et al.
• 通讯作者: et al.