摘要
海雾是海洋上低层大气中的一种水汽凝结现象。由于雾中能见度低，海雾成为海洋运输、水产捕捞、海洋开发和海上军事活动等的一大障碍，是海洋上的一种灾害性天气。
In this section, the climatic background of marine fog, its synoptic feature,the advectioh effect of low level atmosphere and the turbulent exchange between air and sea were summarily studied by basically using special observation bata on marine fog. The results showed that fog on the seas was mainly advection fog, it occurred from March to August while the air temperature was greater than SST;warm and humid air, suitable wind field and stable stratification presented the synoptic teature of marine fog forming,warm advection in low level was an im~ portent characteristic before fog form ing, but it did not form in the phase of the most strong warm advection,otherwise in the phase of the advection decreasing. When the warm and humid air moved on the sea surface,it needed an advection range in which the air reached saturation. Using the concept,the distribution of marine fog on the Huanghai Sea could be better described.The results also showed that the mechanism of marine fog which could be maintained was that the cooling ratio Of the air was greater than the dryiny ratio of the air When ta>tw and the ratio of humidity increasing was greater than that of the temperature increasing when ta<tw.In addition, the results of the observation also showed that fog occurred on the seas included frontal fog. The height of marine fog was about 400m by using the height of the inversion layer to estimate.
