Satellite observations of the North Equatorial Countercurrent in the Western Pacific

• Main Authors: Ying-Hao Huang, 黃英豪
• Other Authors: Nan-Jung Kuo
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/70939578881445091097

碩士 === 國立臺灣海洋大學 === 海洋環境資訊學系 === 97 === The research is based on the data of the Aqua satellite Moderate Resolution Imagining Spectroradiometer (MODIS) and Quick Scatterometer (QuikSCAT) satellite SeaWinds to analyze and investigate the spatial and temporal variations of the chlorophyll-a concentration (Chl-a), sea surface temperature (SST) and sea surface wind (SSW) in the area of the North Equatorial Countercurrent in the western Pacific Ocean. The result shows the higher Chl-a in the southwestern area. Meanwhile, the highest and spatially homogeneous Chl-a happens in January-March, while the lowest Chl-a in July-September. From SST observation, the higher temperature mainly in the south, the colder water will move southward in December, January and February. A special cooling in the western side happens in July-September because of a cold plume happening outside the west part in these months. From SSW observation, it is northeasterly and the strongest in January-March, then it turns to be southwesterly from July, and the northeasterly again in December. The analysis of empirical orthogonal function indicates Chl-a increasing with SST decreasing during El Nino period, the reversed situation in La Nina. For SSW, there is no obvious influence of El Nino, while La Nina induces SSW increasing.