东海沿岸海水表层温度的变化特征及变化趋势

根据东海沿岸引水船、嵊山、大陈、南麂、北礵、平潭、厦门和东山8个海洋观测站的40a表层海水温度(SST)资料进行了统计与分析.研究结果表明:东海沿岸SST主要受制于太阳辐射,呈南高北低分布,但也不同程度地受到当地地理环境、气候环境、水文环境的影响;SST的年变化具有显著的年周期和半年周期;东海沿岸SST存在多种显著周期的振荡,且南北测站SST的主导振荡有差异;就近40a的资料而言,东海沿岸的SST总体呈上升趋势,其中冬季上升幅度最大,暖冬是SST总体呈上升趋势的重要因素.

Characteristics and trend of SST variation in the coastal region of the East China Sea

The 40 years SST data of eight hydrological observation stations (Yinshuichuan, Shengshan,Dachen,Nanji,Beishuang,Pingtan,Xiamen,and Dongshan) in the coastal region of the East China Sea are sumarised and analisized. The research results show that the SST is mainly controlled by solar radiation, secondly controlled by local geography, climate and hydrological conditions. The SST contribution takes on the following trend: south is higher than north. The SST has obviously annual and biannual periods. There exist various SST periodic vibrations, and there exist difference between the south main vibration and the north one. According to 40 years SST data along the East China Sea, as a whole, the SST is increasing with time, with the winter increasing range most, so the warm winter is the important factor to increasing SST.