本文用能谱方法分析了黄 海的 海表面水温（SST）场的准周期变化。
Quasi-periodic variations of the sea surface temperature (SST) field from Huanghai Sea are analysed by using the energy spectrum method.
空间模式在时域上具有一定的振荡周期。其中，前滨模式以4天的准周期变化为主，滩肩模式则有2 8天的准周期性变化。
These modes have obviously oscillations in temporal domain, in which the foreshore mode has mainly quasi period about 4 days, while the quasi period for the beach berm mode is 2 8 days.
平均雾日较多的宜君、石泉和西安有较明显的年变化，大致有6年和8年的准周期。
The mean foggy days of Yijun, Shiquan and xi 'an exist obvious interannual change, about quasi-period of 6, 8 years.
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