极地研究

极地研究 ›› 2003, Vol. 14 ›› Issue (1-English): 1-11.

• 目次 •    下一篇

Measurements of sea ice thickness and its subice morphology analysis using ice-penetration radar in the Arctic Ocean

 Sun Bo1,2, Deng Xinsheng1, Kang Jiancheng1, Luo Yuzhong1, Wen Jiahong1 and Li Yuansheng1   

  1. 1 Polar Research Institute of China, Shanghai 200129, China;
    2 Laboratory of Ice Core and Cold Region Envrionment, Cold and Arid Regions Environmental and Engineering Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • 出版日期:1953-03-30 发布日期:1953-03-30
  • 通讯作者: Sun Bo

Measurements of sea ice thickness and its subice morphology analysis using ice-penetration radar in the Arctic Ocean

1 Polar Research Institute of China, Shanghai 200129, China;
2 Laboratory of Ice Core and Cold Region Envrionment, Cold and Arid Regions Environmental and Engineering Institute, Chinese Academy of Sciences, Lanzhou 730000, China   

  1. Sun Bo
  • Online:1953-03-30 Published:1953-03-30

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摘要：

Based on radar penetrating measurements and analysis of sea ice in the Arctic Ocean, The potential of radar wave to measure sea ice thickness and map the morphology of the underside of sea ice is investigated. The results indicate that the radar wave can penetrate Arctic summer sea ice of over 6 meters thick; and the propagation velocity of the radar wave in sea ice is in the range of 0.142 m·ns-1 to 0.154 m·ns-1. The radar images display the roughness and micro-relief variation of sea ice bottom surface. These features are closely related to sea ice types, which show that radar survey may be used to identify and classify ice types. Since radar images can simultaneously display the linear profile features of both the upper surface and the underside of sea ice, we use these images to quantify their actual linear length discrepancy. A new length factor is suggested in relation to the actual linear length discrepancy in linear profiles of sea ice, which may be useful in further study of the area difference between the upper surface and bottom surface of sea ice.

关键词: the Arctic Ocean, radar penetration, sea ice thickness, underside morphology, sea ice type

Abstract:

Based on radar penetrating measurements and analysis of sea ice in the Arctic Ocean, The potential of radar wave to measure sea ice thickness and map the morphology of the underside of sea ice is investigated. The results indicate that the radar wave can penetrate Arctic summer sea ice of over 6 meters thick; and the propagation velocity of the radar wave in sea ice is in the range of 0.142 m·ns-1 to 0.154 m·ns-1. The radar images display the roughness and micro-relief variation of sea ice bottom surface. These features are closely related to sea ice types, which show that radar survey may be used to identify and classify ice types. Since radar images can simultaneously display the linear profile features of both the upper surface and the underside of sea ice, we use these images to quantify their actual linear length discrepancy. A new length factor is suggested in relation to the actual linear length discrepancy in linear profiles of sea ice, which may be useful in further study of the area difference between the upper surface and bottom surface of sea ice.

Key words: the Arctic Ocean, radar penetration, sea ice thickness, underside morphology, sea ice type