碩士 / 國立臺灣海洋大學 / 環境生物與漁業科學學系 / 100 / This study applied both an edge detection method on high-resolution (1.1-km) sea surface temperature (SST) imagery and a new Chl-a front detection method on high-resolution (1.1-km) chlorophyll-a (Chl-a) imagery, based on a seven-year (2002-2008) satellite-derived data set. We attempt to investigate the difference between SST fronts and Chl-a fronts in the East China Sea during the summer season. Four frontal bands were detected in our results. (1)The Jiansu Fronts (JFs) exists off Jiansu Province with several frontal bands. (2)Yangtze Bank Front (YBF) appears in a ring-shape off the Yangtze River Estuary. (3)China Coastal Front (CCF) distributes along the 50m isobath from northern ECS extending southwestward into Taiwan Strait. (4)Kuroshio Front (KF) forms from the northeast of Taiwan with a curving shape between the 100-200 isobath.
In summer, the SST fronts are not easily defined (GM <0.15°C/km.) owing to the southwest monsoon, Taiwan Strait Warm Current and the Kuroshio Current. However, the Chl-a fronts are best methodology to detect the position and the gradient magnitude of front in the East China Sea, especially in the Yangtze Bank and southern Mainland China Coast (south of Hangzhou Bay). In addition, several Chl-a fronts related to the intrusion of Kuroshio are also detected in the northeast of Taiwan. In this study, the different remote sensing technology gives us forther understanding on hydrographic variation in the East China Sea.
| Identifer | oai:union.ndltd.org:TW/100NTOU5451003 |
| Date | January 2012 |
| Creators | Chi-sen Yang, 楊其生 |
| Contributors | Ming-an Lee, 李明安 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 66 |
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