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Ship-borne electromagnetic induction sounding of sea-ice thickness in the southern Sea of Okhotsk

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タイトル: Ship-borne electromagnetic induction sounding of sea-ice thickness in the southern Sea of Okhotsk
著者: Uto, Shotaro 著作を一覧する
Toyota, Takenobu 著作を一覧する
Shimoda, Haruhito 著作を一覧する
Tateyama, Kazutaka 著作を一覧する
Shirasawa, Kunio 著作を一覧する
発行日: 2006年11月
出版者: International Glaciological Society
誌名: Annals of Glaciology
巻: 44
号: 1
開始ページ: 253
終了ページ: 260
出版社 DOI: 10.3189/172756406781811510
抄録: Recent observations have revealed that dynamical thickening is dominant in the growth process of sea ice in the southern Sea of Okhotsk. That indicates the importance of understanding the nature of thick deformed ice in this area. The objective of the present paper is to establish a ship-based method for observing the thickness of deformed ice with reasonable accuracy. Since February 2003, one of the authors has engaged in the core sampling using a small basket from the icebreaker Soya. Based on these results, we developed a new model which expressed the internal structure of pack ice in the southern Sea of Okhotsk, as a one-dimensional multilayered structure. Since 2004, the electromagnetic (EM) inductive sounding of sea-ice thickness has been conducted on board Soya. By combining the model and theoretical calculations, a new algorithm was developed for transforming the output of the EM inductive instrument to ice + snow thickness (total thickness). Comparison with total thickness by drillhole observations showed fair agreement. The probability density functions of total thickness in 2004 and 2005 showed some difference, which reflected the difference of fractions of thick deformed ice.
Rights: © 2006 International Glaciological Society
Relation (URI):
資料タイプ: article
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 白澤 邦男


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