海南新海夏季潮流谱分析和余流研究
The spectrum analysis of tidal current and the study of residual current in summer in Xinhai Bay of Hainan Province
-
摘要: 根据夏季琼州海峡新海附近15 m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12 h,12.4 h,日潮存在两个,一个在23.9 h,另一个在25.8 h前后;在半日潮和全日潮分量中,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8.3 h,6.2 h和超过24 h的4.2 d,3 d等也很明显,但是未通过显著性检验; 大多数余流流速在5~10 cm/s之间,个别情况超过40 cm/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。Abstract: 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.
-
Key words:
- Xinhai /
- spectrum analysis /
- tidal current /
- residual current
-
SHI Maochong, CHEN Changsheng , XU Qichun, et al. The role of the Qiongzhou Strait in the seasonal variation of the South China Sea circulation [J]. J Phys Oceanogr , 2003,32(1):103-121. 侍茂崇,陈春华,黄方,等.琼州海峡冬末春初朝余流场特征 [J].海洋学报,1998, 20(1):1-4. 薛惠洁,柴扉,徐亚丹,等.南海海流数值计算 [J]//中国海洋学文集,第13集. 北京:海洋出版社,2001:1-14. 杨士瑛, 鲍献文, 陈长胜,等. 夏季粤西沿岸流特征及其产生机制 [J]. 海洋学报,2003,25(6):1-8. 陈达森,陈波,严金辉,等.琼州海峡余流场季节性变化特征 [J].海洋湖沼通报,2006(2):12-17. 陈上及,马继瑞.海洋数据处理分析方法及其应用 [M].北京:海洋出版社,2000:96-107. 黄祖珂,黄磊.潮汐原理与计算 [M].青岛:中国海洋大学出版社,2005. THOMPSON R O R Y. Low-pass filters to suppress inertial and tidal frequencies [J]. J Phys Oceanogr ,1983, 13 (6):1077-1083. 侍茂崇,严金辉,陈波,等.琼州海峡夏季三塘潮流谱分析和余流特征研究[J]. 中国海洋大学学报,2011,41(11):1-4. 侍茂崇,等.物理海洋学 [M].济南:山东教育出版社,2005.
点击查看大图
计量
- 文章访问数: 1506
- HTML全文浏览量: 4
- PDF下载量: 1341
- 被引次数: 0