中文摘要：

利用1988—2010年渤海湾埕北油田A平台的气象水文观测资料，对近23年渤海湾海雾进行了气候统计分析，并对其形成机制进行了探讨。结果表明，受海洋和陆地气流的双重影响，A平台雾日数在春、夏和秋季具有明显的海洋性特征，冬季受陆地影响较大；其中有59．2％的海雾出现在较暖海面上，平流蒸发雾多于平流冷却雾，这与渤海湾的气象水：疋特征有关；2～3级风是渤海湾成雾的最佳风速，其次是4—5级风；在海温大于气温的条件下，有88％的雾样本满足平流蒸发雾的成雾条件，蒸发增湿的作用显著；而在平流冷却雾中，海面蒸发仍然存在，表明海洋下垫面与陆地下垫面的差异。

英文摘要：

Using meteorological and hydrological observed data from 1988 to 2010 from Platform A of Chengbei Oilfield in Bohai Bay, the climate statistics of sea fog was analyzed and the occurring mechanism was discussed. The results show that due to the dual influence of flow from sea and land, the fog days have distinct marine char- acteristic in spring, summer and autumn, while have continental feature in winter. 59.2% fog events happened over warmer sea surface. Among them, advection evaporation fog days were more than advection cooling fog days, which was related to the meteorological hydrological features of Bohai Bay. The most suitable wind speed for sea fog formation was 2 - 3 grade wind, and second was 4 -5 grade wind. When the sea surface temperature were higher than that of air, more than 88 % fog samples satisfied the condition of advection evaporation fog for- mation due to the significantly increased humidity by evaporation. But, it still has sea surface evaporation in ad- vection cooling fog which indicated the difference between the continental surface and oceanic surface. The evap- oration in the samples of advection cooling fog showed the difference between the underlying surface of continen- tal and oceanic.