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| 講演名 | 2013-12-02 16:10 Velocity Measurement of Internal Waves in the South China Sea by Multi-Temporal and Multi-Sensor Satellite Images ○Dan-Bee Hong・Chan-Su Yang（UST）・Kazuo Ouchi（KIOST）  SANE2013-85 |
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| 抄録 | （和） | Oceanic internal waves are generated at the boundary of stratified water layers of different densities associated with salinity and/or temperature. They are often generated by the interaction between the bottom topography and tidal currents. As internal waves propagate the water particles are pushed upward and pulled downward by the stratified boundary, yielding varying surface currents, and these currents move in phase with the internal waves. The varying surface currents produce rough and smooth zones of sea surface, and these differences in surface roughness can be detected by optical imagers and synthetic aperture radars (SARs). In this study, MODIS/Terra and ENVISAT/ASAR were used to obtain sequential images of internal waves in the South China Sea for estimating the propagation properties of internal waves. Most of internal waves in the South China Sea were propagating westward due to strong currents of the Kuroshio. The phase velocities of these internal waves were measured by two methods using; 1) multi-temporal and multi-sensor images acquired in a very short time interval, 2) several packets of internal waves associated with semidiurnal tidal period in a single image. The internal wave velocities estimated by the method 1 ranged from 0.84 m/s to 1.91 m/s depending on the water depth, while those by the method 2 were from 0.37 m/s to 0.59 m/s. It was found that the velocity difference between two methods is up to 1.40 m/s and the phase velocity decreases with decreasing water depth. |
| （英） | Oceanic internal waves are generated at the boundary of stratified water layers of different densities associated with salinity and/or temperature. They are often generated by the interaction between the bottom topography and tidal currents. As internal waves propagate the water particles are pushed upward and pulled downward by the stratified boundary, yielding varying surface currents, and these currents move in phase with the internal waves. The varying surface currents produce rough and smooth zones of sea surface, and these differences in surface roughness can be detected by optical imagers and synthetic aperture radars (SARs). In this study, MODIS/Terra and ENVISAT/ASAR were used to obtain sequential images of internal waves in the South China Sea for estimating the propagation properties of internal waves. Most of internal waves in the South China Sea were propagating westward due to strong currents of the Kuroshio. The phase velocities of these internal waves were measured by two methods using; 1) multi-temporal and multi-sensor images acquired in a very short time interval, 2) several packets of internal waves associated with semidiurnal tidal period in a single image. The internal wave velocities estimated by the method 1 ranged from 0.84 m/s to 1.91 m/s depending on the water depth, while those by the method 2 were from 0.37 m/s to 0.59 m/s. It was found that the velocity difference between two methods is up to 1.40 m/s and the phase velocity decreases with decreasing water depth. | |
| キーワード | （和） | Internal waves / Phase velocity / SAR / MODIS / / / / |
| （英） | Internal waves / Phase velocity / SAR / MODIS / / / / | |
| 文献情報 | 信学技報, vol. 113, no. 335, SANE2013-85, pp. 81-86, 2013年12月. | |
| 資料番号 | SANE2013-85 | |
| 発行日 | 2013-11-25 (SANE) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| 著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します．(許諾番号：10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| PDFダウンロード | SANE2013-85 |
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| 研究会情報 | |
| 研究会 | SANE |
| 開催期間 | 2013-12-02 - 2013-12-03 |
| 開催地（和） | VAST/VNSC(1日目) & Melia Hotel, Hanoi（2日目） |
| 開催地（英） | VAST/VNSC(2nd Dec.) & Melia Hotel (3rd Dec), Hanoi, Vietnam |
| テーマ（和） | ICSANE 2013 (International Conference on Space, Aeronautical and Navigational Electronics) |
| テーマ（英） | ICSANE 2013 (International Conference on Space, Aeronautical and Navigational Electronics) |
| 講演論文情報の詳細 | |
| 申込み研究会 | SANE |
| 会議コード | 2013-12-SANE |
| 本文の言語 | 英語 |
| タイトル（和） | |
| サブタイトル（和） | |
| タイトル（英） | Velocity Measurement of Internal Waves in the South China Sea by Multi-Temporal and Multi-Sensor Satellite Images |
| サブタイトル（英） | |
| キーワード(1)（和/英） | Internal waves / Internal waves |
| キーワード(2)（和/英） | Phase velocity / Phase velocity |
| キーワード(3)（和/英） | SAR / SAR |
| キーワード(4)（和/英） | MODIS / MODIS |
| キーワード(5)（和/英） | / |
| キーワード(6)（和/英） | / |
| キーワード(7)（和/英） | / |
| キーワード(8)（和/英） | / |
| 第1著者 氏名（和/英/ヨミ） | Dan-Bee Hong / Dan-Bee Hong / |
| 第1著者 所属（和/英） | University of Science and Technology (略称： UST) University of Science and Technology (略称： UST) |
| 第2著者 氏名（和/英/ヨミ） | Chan-Su Yang / Chan-Su Yang / |
| 第2著者 所属（和/英） | University of Science and Technology (略称： UST) University of Science and Technology (略称： UST) |
| 第3著者 氏名（和/英/ヨミ） | Kazuo Ouchi / Kazuo Ouchi / |
| 第3著者 所属（和/英） | Korea Institute of Ocean Science and Technology (略称： KIOST) Korea Institute of Ocean Science and Technology (略称： KIOST) |
| 講演者 | 第1著者 |
| 発表日時 | 2013-12-02 16:10:00 |
| 発表時間 | 20分 |
| 申込先研究会 | SANE |
| 資料番号 | SANE2013-85 |
| 巻番号（vol） | vol.113 |
| 号番号（no） | no.335 |
| ページ範囲 | pp.81-86 |
| ページ数 | 6 |
| 発行日 | 2013-11-25 (SANE) |
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