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題名:渤海懸浮物濃度之季節性分佈    
The Seasonal Distribution of the Suspended Matter in Bohai
著者:賴文君(Wen-Chun Lai) ;劉倬騰(Cho-Teng Liu) ;杜勇(Yung Du)
出版地區:台灣
出版城市:台北市
學科:地球科學
關鍵字:渤海 ; 懸浮物 ; 海洋水色 ; 遙測 ; Bohai ; Suspended Matter ; Ocean Color ; Remote Sensing
刊名:台灣海洋學刊
卷期:34卷2期(1995.5)
頁碼:45-60
語言:繁體中文
摘要: 中文摘要PDF ; 英文摘要PDF

對近岸與河口的環境監測與環境變遷而言,海中懸浮物的分佈與傳送是很重要的一環,所以海水懸浮物濃度資料是海洋環境的基本資料之一。雖然海上實測可得到精確的數據,但是它對海洋環境參數的時空代表性相當有限,而且大範圍的海上觀測並不容易,所以衛星遙測是大範圍觀測的較合適方法。可以用來觀測水中懸浮物濃度的遙感探測波段是可見光波段,但是目前並沒有合適的海洋衛星可用於偵測懸浮物。本文嘗試以NOAA系列氣象衛星的極高解像輻射儀(Advanced Very High Resolution Radiometer, AVHRR)資料來推算海中懸浮物濃度的分布。從一些可見光譜與懸浮物關係圖中,我們可以發現懸浮物濃度在NOAA衛星的紅黃光波段與反射率雖非線性關係,但成正相關。因此我們計算了NOAA衛星第一波段的反射率,並用其作為懸浮物濃度的指標,分析懸浮物濃度的空間分布與季節性變化,由所得的結果與文獻上的實測資料相比較,可以看到以紅黃光反射率來代表懸浮物濃度是可行的,其所推算出的表水反射率的分佈,不管在空間上或時間上的變化都與實測的統計資料相符。在時間變化上,冬季裡懸浮物濃度較高,夏季裡懸浮物濃度較低,夏季沿岸高懸浮物濃度水有向岸退縮趨勢。在空間上的分佈,渤海的懸浮物濃度較黃海高,岸邊及河口區較離岸處高。黃河雖然注入大量的泥沙但其範圍都僅限於河口附近。同時我們也嘗試探討影響懸浮物濃度的因素。若無實測資料決定參素,此反射率只是一種指標,而非真正的懸浮物濃度,也不易分辨浮游植物及懸浮泥沙,但在定性上,適於觀測懸浮物的分布,尤其對河口,可知河水的流向,若能再配合實測資料,則更能瞭解河口的環境變遷。
For the monitoring of environmental change in the coastal region or in the estuary, the distribution and the transport of the suspended matter (SM) in the sea water is an important part, and therefore the concentration of SM is a basic information for the marine environment. Although the in situ data are generally more accurate, they may not represent the marine environment at the large spatial scale nor the long time scale. Due to the difficulty, cost and the manpower required for large scale ocean survey, the satellite remote sensing is the best alternative. The visible light is most suitable for the remote sensing of SM, but there is no satellite dedicated for detecting the SM. We use NOAA satellite's AVHRR (Advanced Very High Resolution Radiometer) data to derive the SM distribution in Bohai. In the spectra of SM in the visible bands, there is clearly a positive correlation between the SM concentration and the reflectance of yellow and red light at the sea surface. The yellow and red light reflectance derived from the first two channels of AVHRR data is adopted as the index of SM concentration. The spatial and temporal distribution of this index matches with the SM concentration measured in situ. The SM concentration is high in the winter and low in the summer, and the extent of high SM coastal water retreats closer to shore. The SM concentration is higher in Bohai than in Yellow Sea, higher near the coast than in offshore region. The large amount of SM carried by the Yellow River into Bohai is mostly deposited in the vicinity of the river mouth. Since the reflectance is only a qualitative index, it can not differentiate the plankton from the sediment, but it does help in monitoring the SM in the estuary and coastal regime, in displaying the path of river water into the sea, and in quantifying the change of estuary if combined with in situ data.


    

本卷期目次
台灣海洋學刊 34卷2期 (1995.5)
The Volume Transport of the North Equatorial Current in the Western North Pacific between 14°N and 20°N/ Chong-Kung WuJian-Hwa Hu
Thorium Isotopes as Tracers of Chemical Scavenging and Particle Dynamics in the Ocean: Review and Perspective/ Chih-An HuhChing-Ling Wei
A Preliminary Case Study on the Radiance Imagery of Ocean Color Sensors of FY-1-02 and ROCSAT-1/ De-Lu PanCho-Teng LiuTian-Ming MaoWen-Chun LaiPing Shi
渤海懸浮物濃度之季節性分佈/ 賴文君劉倬騰杜勇
Evaluation on the Precision of Stable Isotopic Analysis of Trace Carbonate Samples for Paleotemperature Estimates/ David D. SheuWen-Chen JouMing-Jue Chen
A Note on the Accuracy of Shipboard ADCP on Ocean Researcher I/ Tswen-Yung TangJa-Chang Ma
 
   
 
   

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