有色溶解性有機物質 ( Colored Dissolved Organic Matter, CDOM ) ，是海洋環境中溶解態有機物質(DOM)的重要光學特性物質，也是總溶解態有機碳( DOC )組成的重要部份。在碳循環研究中，CDOM有助於了解DOM的組成，亦可協助辨認水團特性。
台灣海峽中初夏水團大致有大陸沿岸流水團和南海和黑潮水混合的水團。在DOM特徵中，大陸沿岸流水團CDOM主要螢光特徵為陸源，其影響下的測站DON/DOP值較高，且比值有向東遞減的趨勢，也顯示大陸沿岸流水團中溶解態有機物質多為陸源；而南海和黑潮水混合的水團中缺乏陸源輸入以及在低生產力的影響下，CDOM的螢光特徵顯示較大陸沿岸流範圍內測得之訊號弱。藉由台灣海峽各測站生地化參數與CDOM光學特性各參數歸納，顯示CDOM光學特性可作為追蹤DOM來源的參考依據。
東海夏季則出現6種水團特徵：長江沖淡水、黃海水團、大陸沿岸湧升水團、黑潮水團、台灣暖流水團和黑潮湧升水。CDOM的光學特徵清楚的顯示各測站溶解態有機物質的來源，有助於了解DOM濃度分佈的控制因子。在DOM元素碳氮磷比值上，多數測站C/P比值皆遠高於Redfield ratio，使得在東海DOM相對於大洋呈現碳富集的現象；而在底水部分伴隨著明顯的分解作用影響，因老舊DOC累積而形成高C/P比值的特徵。在1998年與2007年鹽度和吸收係數分佈圖對照下，長江沖淡水的減少在CDOM吸收係數特徵上亦表現出影響區域縮小的趨勢。由因子分析結果推測東海水文及生地化學參數的重要控制因子依序包括陸源輸入影響、黑潮影響、再循環作用和基礎生產力效應。

Colored dissolved organic matter (CDOM) is a part of total dissolved organic matter (DOM) and plays an important role in marine carbon cycling. Thus, a better description of the fates of CDOM may increase our understanding of DOM sources and sinks in marginal seas. This study aims to explore the distributions and possible controlling factors of DOM in the Taiwan Strait (TS) and the East China Sea (ECS) in the summer season.
The TS is a marginal sea of interest as it receives freshwater from both Taiwan Island and Mainland China and it also connects water transports between ECS, South China Sea (SCS) and Kuroshio water (KW). The concentration of DOM is slightly higher in the western side (China coast) than in the eastern side (Taiwan coast), and the highest concentration is always found in the Minjiang plume, revealing a significant impact of river discharge. The absorption and fluorescence properties of CDOM varied to a large degree with space arisen from the mixing of source waters including freshwater (from Taiwan and Mainland China), Changjiang diluted water (CDW), SCS water and KW. The KW and river-plume waters (Changjiang, Minjiang) have the lowest and highest values for absorption coefficient (a(325)) and fluorescence intensity of terrestrial humic-like CDOM (Ft: Ex/Em= 320-360/420-460), respectively. Both a (325) and Ft correlated inversely with salinity. Although the spectral slope (S) varied only within a small range, it still can be used to differentiate water masses in TS, as the S value is generally lower in coastal waters than in SCS and KW. Meanwhile, Ft is highly correlated with surface DIN and Si in TS, showing that these parameters are strongly influenced by terrestrial inputs.
There are six types of water masses mixing in the ECS in summer named CDW, Yellow Sea water (YSW), China coastal upwelling water, KW, Taiwan Strait Warm Current (TSWC) and Kuroshio upwelling water. Generally, the concentrations of DOC, DON and DOP are the highest in the surface water and decrease with depth due to strong degradation below the surface. The DOC/DOP and DOC/DON ratios of the most stations are higher than the Redfield ratio, showing a carbon enrichment of DOM in the ECS. The optical properties of CDOM show particular DOM characteristics in different water masses and reveal clearly the sources of DOM over various zones. After the operation of Tree-Gorges Dam, the CDW covering zone is likely reduced as reflected from the spatial patterns of salinity and absorption coefficient. The factor analysis implies that the terrestrial inputs and influence may be the dominant factor in constraining DOM and CDOM distributions in the TS and ECS.

誌謝 I
中文摘要 II
英文摘要 IV
目錄 VII
表目錄 IX
圖目錄 X

第一章 前言 1
第二章 研究區域 6
2.1 台灣海峽 6
2.2 東海 7
第三章 研究材料與方法 14
3.1 採樣方法 14
3.1.1 台灣海峽 14
3.1.2 東海陸棚 14
3.2 樣品分析 15
3.2.1 營養鹽分析 15
3.2.2 溶解態有機碳之測定 18
3.2.3 總溶解態氮及溶解態有機氮之測定 18
3.2.4 總溶解態磷及溶解態有機磷之測定 19
3.2.5 東海顆粒態有機碳之估算 20
3.2.6 有色性溶解態有機物質之測定 21
第四章 結果與討論 33
4.1 台灣海峽夏初季節營養鹽及有機碳化學 33
4.1.1 表水水文描述 33
4.1.2 表水營養鹽氮、磷與矽 33
4.1.3 表水溶解態有機碳、氮及磷 34
4.1.4 表水有色性溶解態有機物質(CDOM)的光學特性 36
4.1.5 多變數因子分析 38
4.2 東海夏季有機碳化學 55
4.2.1 水文描述 55
4.2.2 溶解態有機碳、氮及磷 56
4.2.3 有色性溶解態有機物質(CDOM)的光學特性 61
4.2.4 多變數因子分析 64
第五章 結論 94
參考文獻 96
中文部份： 96
網站： 96
英文部分： 97

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國家海洋科學研究中心 海洋資料庫
http://140.112.65.17/odbs/main/display.html

中國長江水利委員會水政水資源局網站
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