碩士 / 國立臺灣海洋大學 / 海洋環境資訊系 / 102 / Abstract
This study investigates the rapid growth wave events occurred in the sea near the southeastern tip of Taiwan in 2000-2012 by analyzing the hourly or bi-hourly wave and meteorological information recorded by the Water Resources Agency’s Eluanbi buoy. The rapid growth waves were defined as those waves with significant wave height not only increased more than two times and also grew to higher than 1.5 m in the time span of 6 hours. It was found that in the 13 years there were 218 rapid growth wave events. Among these events, the occurrence percentage was highest in the fall season. The investigation found that the rapid growth wave events were mostly associated with the arrival of the cold, continental high pressure system. Typhoons and tropical depressions were the second most causes of the rapid growth wave events.
This study also calculated the mean of wave and meteorological data for each time interval in the time span 8 hours before and after the start of rapid growth over all events. It was seen that when the wave started to grow, the mean wave height for events associated with typhoon or tropical depression was higher than those associated with continental high pressure system. The mean wave period at each time interval decreased at first before and until the start of wave growth. Then the mean wave period increased afterward. The mean atmospheric pressure and wind speed did not vary much for the events not associated with typhoons or tropical depressions. However, the mean atmospheric pressure did show a decreasing trend after the start of rapid growth, while the wind speed increased after the wave growth. For the events not associated with typhoons and tropical depressions, the mean wind speed did not vary much with time. On the other hand for the events associated with typhoons, the mean wind speed noticeably increased after the start of the wave growth. Finally for all rapid growth events, the wind direction was mostly in the northeast to north of northeast directions.
Keywords: Rapid growth waves; Significant wave height; Typhoon, Continental cold,
high pressure system
| Identifer | oai:union.ndltd.org:TW/102NTOU5276028 |
| Date | January 2014 |
| Creators | LIN, CHE-YU, 林哲宇 |
| Contributors | Tsai, Cheng-Han, 蔡政翰 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 72 |
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