研究生: |
林幼淳 |
---|---|
論文名稱: |
波浪動能影響海溫結構之數值模擬研究 Effects of wave-induced mixing on the temperature structure |
指導教授: | 吳朝榮 |
學位類別: |
碩士 Master |
系所名稱: |
海洋環境科技研究所 Graduate Institute of Marine Environmental Science and Technology |
論文出版年: | 2010 |
畢業學年度: | 98 |
語文別: | 中文 |
論文頁數: | 56 |
中文關鍵詞: | 波浪 、數值模式 、溫度結構 |
論文種類: | 學術論文 |
相關次數: | 點閱:123 下載:10 |
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本研究透過數值模擬的方式,分析波浪對海水溫度的影響。首先利用波浪模式將海表面波浪的大小參數化,再換算為波浪引起之混合動能,並將混合動能定義為 值,希望透過波浪所引起之混合動能,去改善一般海流模式在夏、秋時期對於表層溫度模擬較差的問題。
本研究所使用的模式分別為MASNUM波浪模式與南海模式,將波浪模式計算的波浪動能依照不同程度放入南海模式內,並配合南海SEATS測站的溫度資料作為模式的驗證。比較SEATS測站資料與海流數值模式的結果顯示,在秋季的時候,海流模式對溫度的模擬確實較差,而包含 值的海流-波浪耦合模式能夠加強表層海水的混合,改善海流模式對溫度模擬較差的問題。然而增加的混合動能卻也會加深其他月份的混合層深度,造成其他月份有較大的誤差。
此外,本研究選用強颱—玲玲(2001) 作為研究強風下波浪對溫度影響的對象,並將原波浪模式中線性拖曳係數改變為Oey et al.(2006)的拖曳係數,減低因高風速造成的誤差。結果顯示,包含 值的海流-波浪耦合模式與一般海流模式間的差異在於 值的作用會導致颱風過後的湧升流深度不同。
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