臺灣博碩士論文加值系統

摘要

本研究使用高解析度衛星海洋表面溫度影像，以邊緣偵測法觀測臺灣北部海域冬季海洋表面溫度鋒面，並且解析出二個明顯的鋒面帶：一為沿著50公尺等深線分布且有溫度梯度高值之“大陸沿岸鋒面”，此鋒面可說是大陸沿岸水與離岸陸棚水之間的邊界。另外，自臺灣東北部沿岸延伸至東海陸棚的“黑潮鋒面”，以寬廣的圓弧形沿著100公尺等深線彎延曲行，並且在北緯約26.5度左右東折向外洋流去而離開東海陸棚，此鋒面應是黑潮水與其他陸棚水之間的邊界。
值得注意的是此黑潮鋒面是同時由冷、暖海流所構成，另佐以現場觀測之垂直溫鹽結構圖顯示，在122°E有一低溫低鹽的鋒面，此冷水域是介於黑潮暖水與陸棚混合水之間形成，並已證實為湧昇流結構，稱之為冷渦。由於這個湧昇冷渦的存在而使得冷渦左側形成冷鋒面且右側同時形成暖鋒面。






關鍵字：鋒面、邊緣偵測法、黑潮、海洋表面溫度、衛星遙測

目錄
表目錄----------------------------------------------------I
圖目錄---------------------------------------------------II
摘要-----------------------------------------------------III
Abstract--------------------------------------------------V
壹、前言---------------------------------------------------1
一、 衛星應用於SST觀測及SST鋒面偵測概況----------------1
二、臺灣北部海域海洋環境特性-----------------------------2
三、研究動機---------------------------------------------3
貳、村料方法-----------------------------------------------6
一、衛星遙測影像與海洋探測資料---------------------------6
二、A-HIGHERS系統與SST影像------------------------------7
三、邊緣偵測法------------------------------------------11
參、結果--------------------------------------------------16
一、月平均 SST影像--------------------------------------16
二、月平均鋒面分佈圖------------------------------------16
三、現場觀測--------------------------------------------17
肆、結論與討論--------------------------------------------19
參考文獻-------------------------------------------------22
謝辭-----------------------------------------------------29

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