碩士 / 國立臺灣海洋大學 / 海洋環境資訊學系 / 98 / An existing nonlinear, three-dimensional model, Princeton Ocean Model (POM), is used to study the tidal current flowing across the Keelung Sill. The model was forced by tides from the global tidal model, NAO99b, with realistic coastal geometry and field-measured very high-resolution bathymetry around the sill. The model result indicates that the sea surface temperature variation near the Keelung Sill was chaotic, but some kind of rules could still be found. During both of the flood and the ebb tide periods, the cold bottom water climbed along steep terrain and crossed the sill soon after slipping along steep terrain down to the bottom of the other side of sill. The accompanied downwelling will press the surface warm water much deeper. When the tidal range is relatively large, upwelling would rush the bottom cold water off the sea surface. Therefore, we can see a wide range of cold water area on the sea surface. A physical phenomenon occurs near the sill that the internal tides generated obviously during the ebb tide.
| Identifer | oai:union.ndltd.org:TW/098NTOU5282034 |
| Date | January 2010 |
| Creators | Miao-Tien Cheng, 鄭淼天 |
| Contributors | Yao-Tsai Lo, 羅耀財 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 86 |
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