北京大学学报自然科学版 ›› 2022, Vol. 58 ›› Issue (5): 839-849.DOI: 10.13209/j.0479-8023.2022.055

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基于高频地波雷达观测的粤港澳大湾区春季海表流特征研究

任磊1,2, 杨凡3,†, 杨凌娜1, 陈晓帆1, 潘广维1, 韦骏2,4,†    

  1. 1. 中山大学海洋工程与技术学院, 珠海 519082 2. 南方海洋科学与工程广东省实验室(珠海), 珠海 519082 3. 国家海洋局珠海海洋环境监测中心站, 珠海 519015 4. 中山大学大气科学学院, 珠海 519082
  • 收稿日期:2021-07-02 修回日期:2021-09-30 出版日期:2022-09-20 发布日期:2022-09-20
  • 通讯作者: 杨凡, E-mail: yangf@scs.mnr.gov.cn, 韦骏, E-mail: weijun5@mail.sysu.edu.cn
  • 基金资助:
    广东省重点领域研发计划(2020B1111020003)、国家自然科学基金(51909290, 41976007, 91958101)、广东省科技计划(2020A1414010264)和广州市科技创新项目(201904010430)资助

Characteristics of Surface Currents in Guangdong-Hong Kong-Macao Greater Bay Area in Spring Based on High Frequency Radar Observations

REN Lei1,2, YANG Fan3,†, YANG Lingna1, CHEN Xiaofan1, PAN Guangwei1, WEI Jun2,4,†   

  1. 1. School of Ocean Engineering and Technology, Sun Yat-sen University, Zhuhai 519082 2. Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082 3. Zhuhai Marine Environmental Monitoring Central Station of the State Oceanic Administration, Zhuhai 519015 4. School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai 519082
  • Received:2021-07-02 Revised:2021-09-30 Online:2022-09-20 Published:2022-09-20
  • Contact: YANG Fan, E-mail: yangf@scs.mnr.gov.cn, WEI Jun, E-mail: weijun5@mail.sysu.edu.cn

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摘要：

基于高频地波雷达系统监测得到的海表流资料, 选取907个高密度空间点, 运用调和分析等方法, 探究粤港澳大湾区2020年3月的潮流特征。结果表明, 该海域潮流以不规则半日潮M2分潮为主, 且浅水分潮影响显著。主要全日分潮和半日分潮的倾角都在120°~160°之间, 即最大流速都为西北?东南流向, 表现为向岸?离岸流动的趋势。随着与海岸线距离的增加, 潮型系数和浅水系数逐渐增大, 区域南部离岸区表现出不规则全日潮的特征。可能最大流速和实测最大流速的范围分别为0.33~71.01 cm/s和58.63~149.99 cm/s, 其大值都分布于研究区的西北部和南部。

关键词: 高频地波雷达, 海流, 潮流, 粤港澳大湾区, 调和分析, 最大流速 

Abstract:

Based on the sea surface currents data of Guangdong-Hong Kong-Macao Greater Bay Area (GBA) in March 2020 obtained from high frequency radar (HFR), the surface currents data from 907 densely distributed points were selected to analyze the characteristics of spatial-temporal variation. Harmonic analysis and some other methods were used to explore the characteristics of tidal currents. The results show that the irregular semidiurnal tide M2 is dominant in the sea area, and the shallow-water effect is significant. The dip angles of the main diurnal and semidiurnal tides are between 120° to 160°. The direction of maximum flow rate is WN-ES, which shows the trend of shore offshore flow. As the distance to the shoreline increases, the tidal current pattern coefficient and the effect of shallow water constituents coefficient gradually increase, and the offshore area in the south of the research area shows the characteristics of irregular diurnal tide. The ranges of probable maximum current velocity and measured maximum current velocity were 0.33 cm/s to 71.01 cm/s and 58.63 cm/s to 149.99 cm/s, respectively, with the upper-end values distributed in the northwest and south of the study area.

Key words: high frequency radar, currents, tidal currents, Guangdong-Hong Kong-Macao Greater Bay Area; harmonic analysis, maximum current velocity

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