摘要
為了解台灣東北部海域長距型CODAR(近岸高頻測流雷達)的觀測，比較CODAR軟體提供流場，與本研究分析徑向資料分布，前者使用2011年3月3日至2012年3月15日之資料，後者資料時間為2011年9月1日至2011年10月31日，兩者分析結果與台灣東北部海域歷史觀測資料互相驗證。研究結果顯示(1)黑潮表層流受風場變化影響很大，有季節性的變化，夏季極大值達1.5 m/s，冬季極小值0.5 m/s。(2)計算合成流速，選用CODAR資料角度最好介於15°至165°。(3)比較CODAR軟體提供流場，與本研究分析徑向速度所得，相關係數為0.56，差異區域主要發生在CODAR涵蓋範圍邊界。(4)比較一周平均地轉流場，在角度良好的範圍內，徑向合成速度表現較佳。(5)使用EOF分析CODAR長期觀測，第一模態佔40%，表面海流受季風的影響。

Abstract

This study analyzed long-range CODAR data collected at two stations (Suao and Hanban) in the northeast Taiwan. Two methods were applied, the software provided by CODAR and the radial velocity reversion least-square method, to calculate the true flow. The former method applied to data collected during 2011/03/ 03 to 2012/03/15, while the latter applied to data of 2011/09/01 to 2011/10/31. Results of data analyses showed that (1) Current speed increased in the summer with maximum of 1.5m/s and reduced to a minimum of 0.5 m/s in the winter. (2) Reasonably good data can be obtained using both methods for data collected in the angles between 15 ° and 165 °. (3) Current velocity data computed by the above two methods has a cross correlation coefficient 0.56. The major differences occurred at the edges of CODAR coverage area. (4) The weekly averaged geostrophic currents suggest that the radial velocity reversion least-square method providing a better result than those of CODAR software. (5) EOF analysis of long term CODAR records showed that the first mode accounted for 40% of total variance. The northeast monsoon is important to the surface flows in this region.

目錄
謝誌................................................................i
中文摘要...........................................................ii
英文摘要..........................................................iii
目錄...............................................................iv
第一章 緒論............................................ ...........1
1-1 前言....................................................1
1-2 黑潮水文簡介............................................1
1-3 雷達測流與CODAR相關研究................................5
1-4 研究目的................................................8
第二章 資料蒐集...................................................27
2-1蘇澳區域CODAR資料......................................27
2-2 歷史資料...............................................29
第三章 資料處理與分析分法.........................................35
3-1 合成流速資料分析.......................................35
3-2 徑向流速資料分析.......................................36
3-3 徑向合成流速資料分析...................................41
3-4 歷史水文資料分析.......................................44
3-5 海流分析之調和分析及相關分析...........................45
第四章 結果與討論..................................................78
4-1 合成流速2種方法之比較.................................78
4-2 不同資料之比較.........................................80
4-3 相關研究之討論.........................................85
第五章 結論.......................................................102
第六章 參考資料...................................................103
附錄..............................................................106

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