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研究生:吳庭宇
研究生(外文):Ti-Yu Wu
論文名稱:南海海域二氧化碳及能量通量觀測之研究
論文名稱(外文):Observation of CO2 and energy fluxes at South China Sea
指導教授:莊秉潔莊秉潔引用關係
學位類別:碩士
校院名稱:國立中興大學
系所名稱:環境工程學系所
學門:工程學門
學類:環境工程學類
論文種類:學術論文
論文出版年:2008
畢業學年度:96
語文別:中文
論文頁數:88
中文關鍵詞:海洋環境渦流協變性系統海洋校正公式二氧化碳通量WPL項校正
外文關鍵詞:marine environmentEddy Covariance systemCO2 fluxesship motion correctionWPL correction
相關次數:
  • 被引用被引用:3
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於海洋環境中應用渦流協變性系統進行大氣和海面各項通量觀測時,需考慮到各種干擾因素。以航行中的研究船而言,首先要考慮到的是船體晃動、轉動以及移動所造成之三維風向誤差,這包含了船的偏向角和船速的校正。此外還要考慮開放式儀器會受到環境因素的干擾,如海水、海鹽對於紅外線氣體分析儀所造成的偵測誤差,也都會使資料的可用率及正確率下降。
本研究中共分析三個海洋上的通量及微氣象觀測實驗,分別在2006年5月於台灣海峽、2006年7月及2007年7月於南海進行。為校正風場的誤差,根據陀螺儀所記錄之偏向角,利用Fujitani (1981)所推導之海洋校正公式進行修正,再進行WPL項(Webb et al., 1980)校正以修正水氣及熱通量之影響,最後計算出正確之二氧化碳通量以及其他能量通量。經過陀螺儀校正後發現二氧化碳通量大多為大氣向海面傳輸,又以中午時最為旺盛;但經過WPL校正後,卻變成相反之趨勢。而在蒸發潛熱通量以及可感熱通量部分,各項校正前後都是由海洋向上傳輸,且最大值在中午發生。此外,根據太陽輻射的測量,中午海面反照率約為0.04~0.08,可更了解海洋環境之參數。
While using Eddy Covariance system to observe air-sea flux in the marine environment, there are many problems that must be considered. On the research ship, the problems that should be considered first are errors of wind velocity resulted from shaking, rotation and movement. In addition, it will reduce usability and accuracy of data when the open path analyzer is covered with water drops and salt.
In this research, three flux experiments were carried out at Taiwan Straits in May 2006, and at South China Sea in July 2006 and 2007. In order to correct the error of the wind field, Fujitani (1981) suggested that true wind velocity should be corrected by ship motion correction according to the angle of deflection. Then the CO2 fluxes should be corrected by the latent heat fluxes and the sensible fluxes (WPL correction) (Webb et al., 1980). After ship motion correction and WPL correction, we can calculate the true fluxes.
The CO2 fluxes including ship motion correction showed a sink from the air to the ocean, especially at noon. But the total CO2 fluxes including WPL correction showed a source from the ocean to the air. Other fluxes, the latent heat fluxes and the sensible fluxes, showed a source from the ocean to the air, and the maximums appeared at noon. In addition, according to the measurement of solar radiation, the albedo of sea was 0.04 - 0.08, it can let us understand the parameter of the marine environment even more.
第一章 前言 1
1.1研究緣起 1
1.2研究目的 2
第二章 文獻回顧 3
第三章 研究理論與實驗方法 10
3.1 座標系統 12
3.2 海洋平台校正方法 19
3.3 WPL校正 22
3.4 地表反照率 25
第四章 實驗設備 26
4.1渦流協變性系統儀器(Eddy Covariance System, ECS) 27
4.1.1 高速反應系統(High Response Subsystem) 27
4.1.2 低速反應系統(Low Response Subsystem) 34
4.2 校正系統 37
4.2.1陀螺儀(motion pack-Gyro) 37
4.2.2 全球衛星定位系統(Garmin 16-HVS GPS Receiver) 39
4.3自動可調式噴水裝置 40
第五章 案例一 2006年5月1149航次 41
5.1 背景說明 41
5.2 風速校正 44
5.2.1 船速 44
5.2.2 各方向風速之校正 46
5.3 各通量之校正比較 48
5.3.1 二氧化碳通量 48
5.3.2 蒸發潛熱通量 49
5.3.3 可感熱通量 50
第六章 案例二 2006年7月802航次 52
6.1 背景說明 52
6.2 各項觀測資料 56
6.2.1 二氧化碳濃度 56
6.2.2 水氣濃度 57
6.2.3 大氣溫度 58
6.3輻射通量與反照率 60
6.3.1輻射通量 60
6.3.2反照率 61
第七章 案例三 2007年7月837航次 63
7.1 背景說明 63
7.2 風速校正 67
7.2.1 船速 67
7.2.2 各方向風速之校正 69
7.3 各通量之校正比較 72
7.3.1 WPL校正風速 72
7.3.2 二氧化碳通量 73
7.3.3 蒸發潛熱通量 75
7.3.4 可感熱通量 76
7.4 輻射通量與反照率 79
7.4.1 輻射通量 79
7.4.2 反照率 80
第八章 結論與建議 82
8.1結論 82
8.2建議 83
第九章 參考文獻 84
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