极地研究

极地研究 ›› 2003, Vol. 14 ›› Issue (1-English): 73-80.

• 目次 • 上一篇    

Comparative studies in method for stratigraphical structure measurement of ice cores: Identification of cloudy bands

 Morimasa Takata1,3, Hitoshi Shoji2, Atsushi Miyamoto2,3 and Kimiko Shimohara2   

  1. 1 National Institute of Polar Research, Kaga 1-9-10, Itabashi-ku, Tokyo 173-8515, Japan;
    2 Kitami Institute of Technology, Koencho 165, Kitami, Hokkaido 090-8507, Japan;
    3 Institute of Low Temperature Science, Hokkaido University, N19W8, Kita-ku, Sapporo, Hokkaido 060-0819, Japan
  • 出版日期:1953-03-30 发布日期:1953-03-30
  • 通讯作者: Morimasa Takata

Comparative studies in method for stratigraphical structure measurement of ice cores: Identification of cloudy bands

 Morimasa Takata1,3, Hitoshi Shoji2, Atsushi Miyamoto2,3 and Kimiko Shimohara2   

  1. 1 National Institute of Polar Research, Kaga 1-9-10, Itabashi-ku, Tokyo 173-8515, Japan;
    2 Kitami Institute of Technology, Koencho 165, Kitami, Hokkaido 090-8507, Japan;
    3 Institute of Low Temperature Science, Hokkaido University, N19W8, Kita-ku, Sapporo, Hokkaido 060-0819, Japan
  • Online:1953-03-30 Published:1953-03-30
  • Contact: Morimasa Takata

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摘要：

Cloudy bands are typical stratigraphic structure in deep ice core. Detailed recording of cloudy bands is important for dating of ice core since pair of series cloudy band and clear layer is corresponds to annual layer and it sometimes corresponds to volcanic ash layer. We developed two type scanners, transmitted light method and laser tomograph method for the stratigraphic study. Measurements were carried out for NGRIP deep ice core, which containing many cloudy bands, using the two type scanners and digital camera. We discussed about the possibility of identification of cloudy bands by each method and about advantage and disadvantage of measurements and their results.

关键词: Ice core, cloudy band, physical structure, laser tomograph, measurement technique

Abstract:

Cloudy bands are typical stratigraphic structure in deep ice core. Detailed recording of cloudy bands is important for dating of ice core since pair of series cloudy band and clear layer is corresponds to annual layer and it sometimes corresponds to volcanic ash layer. We developed two type scanners, transmitted light method and laser tomograph method for the stratigraphic study. Measurements were carried out for NGRIP deep ice core, which containing many cloudy bands, using the two type scanners and digital camera. We discussed about the possibility of identification of cloudy bands by each method and about advantage and disadvantage of measurements and their results.

Key words: Ice core, cloudy band, physical structure, laser tomograph, measurement technique