根据夏季琼州海峡新海附近15m处地层潮流谱分析结果可得,无论是f＞0或f＜0,全日潮谱峰都高于半日潮谱峰.其中,半日潮周期,约为12h,12.4h,日潮存在两个,一个在23.9h,另一个在25.8h前后；在半日潮和金日潮分量中,反时针分量是主要的、顺时针的日潮能谱只有反时针的84％；顺时针的半日潮能谱只有反时针的63％;浅水分潮8.3h,6.2h和超过24h的4.2d,3d等也很明显,但是未通过显著性检验；大多数余流流速在5～10cm/s之间,个别情况超过40cm/s.受反时针运动涡旋影响,余流主要向偏东北、北、西北方向运动.在这个区间内的流向,占总观测数68％以上；风对余流也有重要影响:东北风将使余流方向偏向西北,偏北向风将使余流方向偏南.%Based on the result of tidal current in the Xinhai area of Qiongzhou Strait, no matter f> 0 or f< 0 , diurnal tidal spectrum peak is higher than the semidiurnal tidal spectrum peak. Among them, the cycles of semidiurnal tide are about 12. 0 h and 12. 4 h, and the cycles of diurnal tide are about 23. 9 h and 25. 8 h. In the component of diurnal and semidiurnal tide, the anti-clockwise component is the main component; clockwise diurnal spectrum is only 84% of anti-clockwise diurnal tidal energy spectrum; clockwise semidiurnal tidal energy spectrum is only 63% of anti-clockwise semidiurnal tidal energy spectrum. The main cycles of shallow-water tide are 8. 3 h and 6.2 h, and others longer than one day, such as 4. 2 d and 3 d, are also obvious, but they all don't content significant test. The velocity of most residual currents ranges from 5 cm/s to 10 cm/s, some particulars are over 40 cm/s. Influenced by the anti-clockwise circulation movement, the main directions are in the range of NE,N and NW , which make up more than 68% of the total observations. Wind also has significant effect; northeast wind will make direction of residual current to south, the north wind will make the direction of residual current to south.
展开▼
