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研究生：	江紫綾 Tzu-Ling Chiang
論文名稱：	北南海流況之研究 Circulation structure in the northern South China Sea
指導教授：	吳朝榮 Wu, Chau-Ron
學位類別：	碩士 Master
系所名稱：	地球科學系 Department of Earth Sciences
論文出版年：	2006
畢業學年度：	94
語文別：	中文
論文頁數：	85
中文關鍵詞：	海洋數值模式、南海暖流、渦旋脫離
英文關鍵詞：	ocean numerical modeling, South China Sea Warm Current, eddy shedding
論文種類：	學術論文
相關次數：	點閱：290 下載：23
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南海（South China Sea，SCS）位於0°N~23°N、99°~121°E，是一個東北－西南走向半封閉性的海盆。其對外的通道多為水深較淺或水道狹窄的海峽，唯有東北部的呂宋海峽具有較廣闊及縱深的水道。
　　本研究，利用POM（Princeton Ocean Model）建構一個高解析度的區域海流數值模式來模擬並描述南海的流況。運用巢狀嵌合模式系統之方法，利用較大模式範圍輸出之結果，提供南海模式所需之初始條件及邊界條件。並使用AVHRR（Advanced Very High Resolution Radiometer）的海表面溫度。
　　南海模式（South China Sea Model，SCSM）的範圍東西向介於99°~124°E，南北向介於2°~27°N，水平解析度為1/16°x 1/16°，垂直方向有26個σ層，執行時間為1999~2003年。
　　本模式可重現南海季節、季內變化，並可成功地模擬出南海暖流（South China Sea Warm Current，SCSWC）。經由分析及試驗得知，風應力的變化並沒有立即地影響南海暖流。另外亦求得呂宋海峽附近之渦旋脫離週期於夏天為90~120天，冬天為40~50天，冬天形成之渦旋個數較多。渦旋脫離後向西行進的速率大約是0.09~0.11公尺/秒，與此區域之第一斜壓羅士培波（1st baroclinic Rossby wave）之行進速率相近。

誌謝…………………………………………………………………………  V
摘要…………………………………………………………………………  VI
目錄…………………………………………………………………………  VII
表目錄………………………………………………………………………  X
圖目錄………………………………………………………………………  XI
第一章　緒論………………………………………………………………  1
　　1.1地理位置…………………………………………………………  1
　　　　1.1.1南海………………………………………………………  1
　　　　1.1.2南海北部…………………………………………………  2
　　1.2早期與近期之研究………………………………………………  2
　　　　1.2.1南海海流與水文狀況……………………………………  2
　　　　1.2.2南海暖流（South China Sea Warm Current）…  4
　　　　1.2.3 實驗計畫………………………………………………   6
　　1.3本論文之研究目的………………………………………………  7
第二章　研究方法及工具…………………………………………………  9
　　2.1南海模式（South China Sea Model）……………………  9
　　　　2.1.1模式特色…………………………………………………  9
　　　　2.1.2模式理論…………………………………………………  12
　　　　2.1.3模式設定…………………………………………………  18
　　2.2經驗正交函數（EOF）…………………………………………   22
第三章　模式之結果及討論………………………………………………  24
　　3.1比較與驗證………………………………………………………  24
　　　　3.1.1南海流況…………………………………………………  24
　　　　3.1.2流速比較…………………………………………………  25
　　　　3.1.3溫度比較…………………………………………………  25
　　3.2結果與討論－初探南海暖流……………………………………  26
　　　　3.2.1模式重現…………………………………………………  26
　　　　3.2.2南海北部淺處與深處比較………………………………  27
　　　　3.2.3風場是南海暖流主要的動力機制嗎？…………………  28
　　　　3.2.4風應力、南海暖流及壓力梯度力間的關係……………  29
　　　　3.2.5南海暖流形成機制的試驗………………………………  30
　　3.3結果與討論－渦旋脫離（eddy shedding）…………………  31
　　　　3.3.1脫離理論…………………………………………………  31
　　　　3.3.2再次驗證…………………………………………………  31
　　　　3.3.3脫離週期…………………………………………………  32
　　　　3.3.4分析渦旋…………………………………………………  33
　　　　3.3.5渦旋之行進………………………………………………  35
第四章　結論………………………………………………………………  36
　　4.1結論………………………………………………………………  36
　　4.2未來工作…………………………………………………………  37
　　　　4.2.1南海暖流之深入探討……………………………………  37
　　　　4.2.2渦旋對南海水文與環流的影響…………………………  37
　　　　4.2.3呂宋海峽之深層海水交換研究…………………………  37
　　　　4.2.4物理－生地化耦合模式研究……………………………  38
參考文獻 …………………………………………………………………… 39
附件…………………………………………………………………………  45
                                

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