黄海北部(石岛以北、渤海海峡以东)海区,是我国海雾较多的海区之一,其中成山头和小长山岛近海海雾最为频繁,年平均雾日分别为82天和51天左右。该区以平流雾为主,其生消较为突然,持续时间短则十几分钟,长则达二十多天。 平流海雾具有明显的日变化和季节性变化规律。一日中,海雾多发生在半夜至凌晨的时间内,上午最少。一年中,夏季出雾最多,秋季最少(见表1)。从月际变化看,自3月起 The northern part of the Yellow Sea (north of Shidao, east of Bohai Strait) is one of the sea areas with more sea fog in China. Among them, sea fog near Chengshantou and Xiaochangshan Island is the most frequent, with average annual foggy days of 82 days and 51 Days or so. The area is dominated by advection fog. Its birth abruptness is relatively sudden with a short duration of ten minutes and a long length of more than 20 days. Advection sea fog has obvious diurnal and seasonal variation. One day, the sea fog occurred in the middle of the night to midnight, at least the morning. In the year, the most mist was in summer and the lowest in autumn (see Table 1). Change from month to month, starting from March