臺灣博碩士論文加值系統

本研究使用交通部中央氣象局於台灣周邊海域之三浮標站(龜山島、台東、新竹)資料，分析各測站在路徑2、3、4類登陸颱風警報期間之對應波高與週期變化特性，藉由從警報發布到解除之期間，颱風的強度、移動速度、路徑與七級風暴風半徑，對比三個測站所觀測到之波高、週期資料，探討侵台颱風對台灣周邊海域形成湧浪的影響。分析結果顯示，颱風的強度並不是影響湧浪大小變化的主要因素，在颱風路徑方面，當侵台路徑是2、3、4類時，台東測站的湧浪大部分會比龜山島測站提早發生，當颱風路徑為第2、3類時，台東測站最大波高大部分比龜山島測站為低，當颱風路徑為第4類時，台東測站最大波高與平均波高才會大於龜山島測站。當颱風穿越中央山脈到達台灣西側時，因受到中央山脈阻擋，颱風強度減弱，所以新竹測站的平均波高、平均週期、湧浪發生持續時間都比台東測站與龜山島測站明顯減弱。登陸颱風在近台七級風暴風半徑大於250km以上時，平均週期會大於8秒，但平均波高在不同路徑時會有所差別，但均有達到中央氣象局所定之湧浪標準，颱風的移動速度較慢時(小於0.15°/hr)，湧浪之延續時間會較長。

This study uses data from three buoy stations (Guishan Island, Taitung, Hsinchu) of the Central Weather Bureau to analyze variability features of wave height and period in Taiwan’s surrounding oceans influenced by landfall typhoons on Taiwan along type-2, type-3, and type-4 tracks. Analyses connect the intensify, moving speed, track type, and radius of surrounding flows reaching Beaufort force-7 scale of typhoons to swells occurring in typhoon warning periods. Analyses show that typhoon intensity is not the main cause for swell occurrence around Taiwan. For landfall typhoons, on average, the occurrence of swells is normally earlier at Taitung than Guishan Island. However, the maximum wave height is smaller (larger) at Taitung than Guishan Island for TCs with the type-2 and type-3 tracks (a type-4 track). The averaged wave height is larger at Taitung than Guishan Island when typhoons move through southern Taiwan. After crossing the Central Mountain Range, typhoons are weakened in intensity and thus the averaged wave height and period plus occurrence frequency of swell at Hsinchu are apparently weaker than those observed at Taitung and Guishan Island. The averaged wave period can be greater than 8s when landfall typhoons nearby Taiwan have a radius of force-7 flows greater than 250 km. The averaged wave height varies with different typhoon tracks, but all can be larger than 1.5m. A longer duration of swell associates with slow-moving typhoons with a speed slower than 0.15o/hr.

摘要 I
Abstract II
誌謝 IV
目錄 V
表目錄 VI
圖目錄 VII
第一章、前言 1
1.1 研究背景與動機 1
1.2 研究目的 3
1.3 文獻回顧 4
1.4 研究流程 6
第二章、研究資料與研究方法 7
2.1 研究資料 7
2.2 浮標測站資料 9
2.3 研究方法 11
第三章、研究成果 13
3.1 第二類路徑颱風 13
3.1.1 蘇拉颱風 13
3.1.2 蘇力颱風 18
3.1.3 杜鵑颱風 23
3.1.4 尼莎颱風 28
3.2 第三類路徑颱風 32
3.2.1 麥德姆颱風 32
3.2.2 蘇迪勒颱風 37
3.2.3 梅姬颱風 42
3.3 第四類路徑颱風 47
3.3.1 凡那比颱風 47
3.3.2 南瑪都颱風 51
3.3.3 尼伯特颱風 55
3.3.4 白鹿颱風 59
3.4 綜合討論 63
第四章、結論 65
參考文獻 68
中文文獻 68
英文文獻 69
網路資料 71

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