| Measurements of sea ice thickness and its subice morphology analysis using ice-penetration radar in the Arctic Ocean |
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| 作者姓名： | 孙波 邓新生 康建成 罗宇忠 温家洪 李院生 |
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| 作者单位： | Polar Research Institute of China，Polar Research Institute of China，Polar Research Institute of China，Polar Research Institute of China，Polar Research Institute of China，Polar Research Institute of China Shanghai 200129，China，Laboratory of Ice Core and Cold Region Environment，Cold and Arid Regions Environmental and Engineering Institute，Chinese Academy of Sciences，Lanzhou 730000，China，Shanghai 200129，China，Shanghai 200129，China，Shanghai 200129，China，Shanghai 200129，China，Shanghai 200129，China |
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| 基金项目： | 国家自然科学基金，科技部资助项目，Chinese Arctic expedition foundation and Laboratory foundation of |
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| 摘 要： | 1 IntroductionSeaice ,asanimportantcomponentoftheArcticclimatesystem ,hasdrawnsignifi cantscientificinterest.Seaicethicknessanditsmorphologyhavedramaticimpactsono cean atmosphere iceinteractions(Wadhams 1 994;Barryetal.1 993 ;Dickson 1 999;PadhamsandNorman 2 0 0 0 ) ,whichdirectlyaffecttheexchangeprocessandspeedofheatandmassbetweentheoceanandtheatmosphere ,dominatethephysicalmechanicsfea turesofseaice ,andaffecttheseaicemovement&deformationaswellasicefreezing&meltingprocess(Hollandetal.1 99…
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Measurements of sea ice thickness and its subice morphology analysis using ice-penetration radar in the Arctic Ocean |
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| Sun Bo ,Deng Xinsheng ,Kang Jiancheng ,Luo Yuzhong ,Wen Jiahong and Li Yuansheng Polar Research Institute of China,Shanghai ,China Laboratory of Ice Core and Cold Region Environment,Cold and Arid Regions Environmental and Engineering Institute,Chinese Academy of Sciences,Lanzhou ,China.Measurements of sea ice thickness and its subice morphology analysis using ice-penetration radar in the Arctic Ocean[J].Chinese Journal of Polar Science,2003,14(1). |
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| Authors: | Sun Bo Deng Xinsheng Kang Jiancheng Luo Yuzhong Wen Jiahong and Li Yuansheng Polar Research Institute of China Shanghai China Laboratory of Ice Core and Cold Region Environment Cold and Arid Regions Environmental and Engineering Institute Chinese Academy of Sciences Lanzhou China |
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| Institution: | 1. Polar Research Institute of China, Shanghai 200129,China;Laboratory of Ice Core and Cold Region Environment, Cold and Arid Regions Environmental and Engineering Institute, Chinese Academy of Sciences, Lanzhou 730000,China
2. Polar Research Institute of China, Shanghai 200129,China |
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| 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. |
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| Keywords: | the Arctic Ocean radar penetration sea ice thickness underside morphology sea ice type |
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