基于遥感的台湾岛周边海域表层海水温盐特征

卫星遥感具有观测周期短、频率高的优势，可实现大范围、连续的海洋观测。利用遥感的手段对台湾岛周边海域表层海水温度和盐度进行反演，研究了台湾岛周边海域表层海水温度和盐度的分布特征及其成因。研究表明，台湾岛周边海域海水表层温度总体呈现西北低、东南高，由NW向SE以圆弧状向吕宋岛北部沿岸扩散，温度逐步升高，吕宋岛北部沿岸常年温度在26 ℃以上；台湾岛东部海域海水盐度全年相对稳定，吕宋岛北部有一相对固定高盐度区域，台湾海峡受季风、黑潮分支、沿岸流的影响，盐度分布变化较大。

USING REMOTE SENSING FOR STUDY OF TEMPERATURE AND SALINITY OF SURFACE SEAWATER SURROUNDING TAIWAN

With the advantages of short observation cycle and high frequency, satellite remote sensing is widely used for large scale and continuous marine observations. In this paper, the temperature and salinity of sea water around Taiwan Island have been retrieved from remote sensing images. Upon the basis, the distribution pattern of surface water temperature and salinity in the surrounding sea area of Taiwan Island and their causes are studied and discussed. The study revealed that the surface temperature of the sea water surrounding Taiwan Island is relatively low in the northwest and gets higher to southeast, and expands to the southeast coast of northern Luzon in an arc shape. Along the northern coast of the Luzon Island, the year-round temperature reaches 26 degrees. In the eastern part of the sea surrounding Taiwan Island, however, salinity of sea water is stable throughout the year, there is a relatively fixed high salinity region to the north of Luzon in the Taiwan Strait. Under the joint affect of monsoon, Kuroshio current and coastal current, salinity changes greatly in spatial distribution.