利用NOAA卫星AVHRR图像对渤海表层水温年变化的初步分析

利用ＮＯＡＡ卫星ＡＶＨＲＲ图像（使用１９９２～１９９４年共２２幅图像）选取渤海中的１５个特征区域进行分析。根据其年变化曲线，结合渤海的实际情况，讨论了渤海中相应海区的年变化，并且对大部分区域水温变化特征的形成机制进行一些初步的探讨。文中指出，辽西低温中心的动力机制是绕半岛潮流引起的垂直向环流的作用，而正是由于辽东半岛的特殊的地理特征，才可能产生这一明显的低温中心。冬季的黄海暖流在渤海中的作用是非常显著的，它是使冬季渤海中部及南部水温明显高于北部辽东湾水温的重要原因。上述工作证实，利用卫星图像进行海水温度年变化的分析是切实可行的，由此，应充分发挥卫星遥感技术上的优势，以加快海洋学的发展。

Preliminary Analysis of Annual Variation of Surface Water Temperature in Bohai Sea from NOAA AVHRR

The paper picks out 15 special patches in the Bohai Sea for analysis from 22 NOAA AVHRR images (from 1992 to 1994). According to the annual variation curves and the factual circumstances in the Bohai Sea, it discusses the annual variation and the causes of surface water temperature of some patches. It is pointed out that the dynamical mechanism of Liaoxi low temperature center is the action of vertical circulation by tidal currents around the peninsula. In winter the Huanghai warm current has a great effect on the Bohai Sea. It is a main cause why the surface water temperature in the center and the south of the Bohai Sea is evidently higher than that in Liaodong Bay. Based on the above analysis, it is practicable analysising surface water temperature using satellite technique to accelerate the development of oceanography.