碩士 / 國立中山大學 / 海洋物理研究所 / 94 / This study investigates the variations of flow field and water mass due to the influence of topographic effect in the Kaoping Submarine Canyon. The data used in this study are collected from five cruises of field observations using research vessel OR3. Instruments deployed include ship-board ADCP、CTD、tow-ADCP, moored ADCP and vertical arrays of temperature loggers. The collected data are analyzed through a variety of time series analysis technique, such as harmonic analysis、low-pass filter、FFT and EOF analysis.
The results show that (1) the flow in the Kao-ping Canyon was dominated by semi-diurnal tide. Harmonic analysis shows that both bottom layer and the shelf region are dominated by the M2 tide. The amplitude increases with canyon depth, and the major axis of tidal current align with canyon orientation. (2) Water mass are moving around by the oscillation tidal current along the canyon. During flood, surface water flow to southeast, while bottom flow is up canyon. During ebb, surface water goes to northwest, while bottom flow is down canyon. (3) The low-pass flows indicate a counter-clockwise rotation from surface down, which is explained due to bottom frictional effect. (4) EOF analysis of CTD profiles suggested that the first mode (semi-diurnal tide) can explain 88% of the variations.
| Identifer | oai:union.ndltd.org:TW/094NSYS5281002 |
| Date | January 2006 |
| Creators | Yu-ru Lin, 林育如 |
| Contributors | none, 王玉懷 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 85 |
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