Crystal structure study of ice from the Dome Fuji ice core by the X-ray diffraction reciprocal mapping measurements

• Project/Area Number: 21560004
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Applied materials science/Crystal engineering
• Research Institution: Kitami Institute of Technology
• Principal Investigator: HORI Akira 北見工業大学, 工学部, 准教授 (60280856)
• Co-Investigator(Renkei-kenkyūsha): MIYAMOTO Atushi 北海道大学, 低温科学研究所, 博士研究員 (00374645)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2009: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
• Keywords: 氷床コア / 氷 / X線回折 / 逆格子マップ / 結晶組織 / 転位密度 / 格子定数 / ロッキングカーブ

Research Abstract

X-ray diffraction reciprocal space mapping measurements were conducted to investigate the crystal structure of ice of the Dome Fuji ice core. The broadening of the rocking curve of the ice crystals was caused by the dislocations introduced during the ice sheet flow. The dislocation density decrease with the increasing depth. The lattice constant c of ice is larger than that of the laboratory ice and decreases with the increasing depth while the lattice constant a is only slightly larger than that of the laboratory and increases a little with the increasing depth. These can be attributed to micro bubbles in the ice samples.

Research Products

• [Presentation] X線回折方によるドームふじ氷床コア氷の構造に関する研究 (2011)
  • Author(s): 堀彰、宮本淳、本堂武夫
  • Organizer: 極地科学シンポジウム
  • Place of Presentation: 国立極地研究所(立川)
  • Year and Date: 2011-11-16
• [Presentation] X線回折方によるドームふじ氷床コア氷の構造に関する研究 (2011)
  • Author(s): 堀彰、宮本淳、本堂武夫
  • Organizer: 極域科学シンポジウム
  • Place of Presentation: 国立極地研究所(立川)
  • Year and Date: 2011-11-16
• [Presentation] X-ray Diffraction Measurements of Reciprocal Lattice Mapping on Vostok Ice Core (2010)
  • Author(s): Akira Hori, Atsushi Miyamoto, Takeo Hondoh, Vladimir Ya. Lipenkov
  • Organizer: International Conference on the Physics and Chemistry of Ice (PCI-2010)
  • Place of Presentation: 北海道大学(札幌)
  • Year and Date: 2010-09-09
• [Presentation] X-ray Diffraction Measurements of Reciprocal Lattice Mapping on Vostok Ice Core (2010)
  • Author(s): Akira Hori, Atsushi Miyamoto, Takeo Hondoh, Vladimir Ya.Lipenkov
  • Organizer: International Conference on the Physics and Chemistry of Ice(PCI-2010)
  • Place of Presentation: 札幌(北海道大学)
  • Year and Date: 2010-09-09
• [Presentation] Ice lattice distortion of the Dome Fuji deep ice core from X-ray diffraction measurements (2009)
  • Author(s): Akira Hori, Atushi Miyamoto, Takeo Hondoh
  • Organizer: The 2nd International Symposium on Dome Fuji Ice Core and Related Topics
  • Place of Presentation: 国立極地研究所(東京)
  • Year and Date: 2009-11-20
• [Presentation] Ice lattice distortion of the Dome Fuji deep ice core from X-ray diffraction measurements (2009)
  • Author(s): Akira Hori, Atsushi Miyamoto, Takeo Hondoh
  • Organizer: The 2nd International Symposium on Dome Fuji Ice Core and Related Topics
  • Place of Presentation: National Institute of Polar Research, Tokyo
  • Year and Date: 2009-11-19