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Observations of vertical tidal motions of a floating iceberg in front of Shirase Glacier, East Antarctica, using a geodetic-mode GPS buoy
https://nipr.repo.nii.ac.jp/records/12704
https://nipr.repo.nii.ac.jp/records/12704ca606c76-10c0-48ad-b6f0-c3872267e1bd
Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2016-05-31 | |||||
タイトル | ||||||
タイトル | Observations of vertical tidal motions of a floating iceberg in front of Shirase Glacier, East Antarctica, using a geodetic-mode GPS buoy | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Observations of vertical tidal motions of a floating iceberg in front of Shirase Glacier, East Antarctica, using a geodetic-mode GPS buoy | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Vertical tidal motion by GPS-buoy | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Fluctuating horizontal flow | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Tidal harmonic | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Global ocean tide model | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Subsidence by basal melting | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Aoyama, Yuichi
× Aoyama, Yuichi× Kim, Tae-Hee× Doi, Koichiro× Hayakawa, Hideaki× Higashi, Toshihiro× Ohsono, Shingo× Shibuya, Kazuo |
|||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | A dual-frequency GPS receiver was deployed on a floating iceberg downstream of the calving front of Shirase Glacier, East Antarctica, on 28 December 2011 for utilizing as floating buoy. The three-dimensional position of the buoy was obtained by GPS every 30 s with a 4–5-cm precision for ca. 25 days. The height uncertainty of the 1-h averaged vertical position was ∼0.5 cm, even considering the uncertainties of un-modeled ocean loading effects. The daily evolution of north–south (NS), east–west (EW), and up–down (UD) motions shows periodic UD variations sometimes attaining an amplitude of 1 m. Observed amplitudes of tidal harmonics of major constituents were 88%–93% (O1) and 85%–88% (M2) of values observed in the global ocean tide models FES2004 and TPXO-8 Atlas. The basal melting rate of the iceberg is estimated to be ∼0.6 m/day, based on a firn densification model and using a quasi-linear sinking rate of the iceberg surface. The 30-s sampling frequency geodetic-mode GPS buoy helps to reveal ice–ocean dynamics around the calving front of Antarctic glaciers. | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 白瀬氷河カービングフロント付近の氷山上に測位用2周波GPS受信機を設置し、GPSブイとして活用した。その30秒毎の3次元位置を、精度4—5 cmで、約25日間測定した。平滑化した1時間毎の上下成分(0.5 cm程度の不確定性を持つ)は海洋潮汐による周期変動を示し、海洋潮汐解析で得られた主要分潮の振幅は、FES2004やTPXO-8 Atlas海洋潮汐モデルの88%–93%(O1分潮)や85%–88%(M2分潮)の値を持つ。氷山表面の沈降率とフィルン圧密モデルから、氷山底面の融解速度、0.6 m/dayが推定された。このように氷山を活用したGPSブイは、カービングフロント付近の氷・海洋ダイナミクスを明らかにするのに役立つ。 | |||||
書誌情報 |
en : Polar Science 巻 10, 号 2, p. 132-139, 発行日 2016-06 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 18739652 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | http://doi.org/10.1016/j.polar.2016.02.005 | |||||
関連名称 | 10.1016/j.polar.2016.02.005 |