热带海洋学报 ›› 2017, Vol. 36 ›› Issue (3): 46-54.doi: 10.11978/2016079CSTR: 32234.14.2016079

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大亚湾的潮汐动力学研究——Ⅱ.潮位和潮流双峰现象的产生机制

严聿晗1,2(), 武文2, 宋德海1(), 鲍献文1,2   

  1. 1. 中国海洋大学物理海洋教育部重点实验室, 山东 青岛 266100
    2. 中国海洋大学海洋与大气学院, 山东 青岛 266100
  • 收稿日期:2016-08-23 修回日期:2016-09-22 出版日期:2017-05-20 发布日期:2017-06-01
  • 作者简介:

    作者简介:严聿晗(1993—), 男, 浙江省金华市人, 硕士研究生, 近海环流与物质输运。Email: yanyuhan@outlook.com

  • 基金资助:
    国家重点基础研究发展计划(2015CB452905);中国博士后科学基金第8批特别资助(2015T80742)

Study on the tidal dynamics in Daya Bay, China — Part Ⅱ. The generation of double high waters and double-peak flood-current flows

Yuhan YAN1,2(), Wen WU2, Dehai SONG1(), Xianwen BAO1,2   

  1. 1. Key Laboratory of Physical Oceanography, Ministry of Education, Ocean University of China, Qingdao 266100, China
    2. College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China
  • Received:2016-08-23 Revised:2016-09-22 Online:2017-05-20 Published:2017-06-01
  • About author:

    Author:QIU Chunhua.E-mail: qiuchh3@mail. sysu.edu.cn

  • Supported by:
    Major State Basic Research Development Program (2015CB452905);China Postdoctoral Science Foundation (2015T80742)

摘要:

文章为大亚湾潮汐动力学系列研究论文的第二部分, 主要关注大亚湾双峰水位现象和涨潮流速双峰现象的产生机制。基于前人研究成果和数学解析方法, 得出在大亚湾海域水位的双峰现象主要是由以M2为代表的半日分潮与四分之一日分潮(如M4分潮)和六分之一日分潮(如M6分潮)共同作用造成的。并对产生双峰水位和涨潮流速双峰的条件进行了数学解析, 利用数值模拟结果发现, M2/M4分潮组合在大亚湾并不能产生双峰水位现象, 而M2/M6分潮组合只能在大亚湾东北的范和港产生双峰水位现象。相对而言, M2、M4和M6 3个分潮叠加的组合在双峰水位的产生范围和双峰间落差上都要大于上述2个分潮的组合。在大亚湾湾内区域, 涨潮流速双峰可以由M2/M4分潮组合, M2/M6分潮组合和M2/M4/M6分潮组合产生, M2/M4/M6分潮产生的涨潮流速双峰强度要比另外两组分潮组合大。

关键词: 大亚湾, 双峰水位, 涨潮流速双峰, 六分之一日分潮, 数值模拟

Abstract:

This paper is the second part of our studies on tidal dynamics in Daya Bay (DYB), China. It illustrates the generation mechanism of double high waters and double-peak flood-current flows. Double high waters resulted from a subtle interaction between a semi-diurnal tide (M2) and higher harmonics (M4 and M6) in DYB. Based on previous studies, the conditions to produce double high waters and double-peak flood-current flows were found in this study by using an analytical method. The double high waters could be generated by combinations of M2/M6 tides (limited in the Fanhe Harbor) or M2/M4/M6 tides; however, the combination of M2/M4 tides failed to produce this unique phenomenon in DYB. Besides, the water falling range between two high waters generated by the combination of M2/M4/M6 tides was larger than that of M2/M6 tides, both in extension and in magnitude. The combinations of M2/M4, M2/M6 and M2/M4/M6 were all able to produce double-peak flood-current flows, but the magnitude of M2/M4/M6 triplet was larger than the other two pairs in DYB.

Key words: Daya Bay, double high waters, double-peak flood-current flows, sexta-diurnal tides, numerical simulation