| 摘要: |
| 基于大亚湾附近海域高频地波雷达的长期海流观测资料，利用T_tide工具包进行调和分析得到该海域余流季节变化特征。分析结果显示：大亚湾附近海域余流的变化特征主要呈冬、夏两种形态，其变化过程与季风的变化同步。其中，冬季形态从10月到次年3月，流向为SW向，流速可达30 cm/s以上；夏季形态仅在5—8月间出现，流向为NE向，流速可达23 cm/s。大亚湾附近海域的余流分布特征不仅与海表面风场变化相关，而且与海底地形也存在显著相关关系。此外，粤东沿岸流与珠江冲淡水对大亚湾附近海域余流空间分布具有调控作用。 |
| 关键词: 海洋水文学 余流 高频地波雷达 季节变化 大亚湾 |
| DOI：10.3969/J.ISSN.2095-4972.2021.02.010 |
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| 基金项目:中国科学院战略性先导科技专项（A类）资助项目（XDA19030301）;深圳市科技创新委员会基础研究资助项目（JCYJ20170307170456535）；深圳市科技计划资助项目（JSGG20170413170110695）；城市计算与数据智能学科建设资助项目 |
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| Analysis of the seasonal variation of the residual currents by HF Surface Wave Radar data in adjacent waters of Daya Bay |
| YUAN Kairui,WANG Jiujuan,LIN Jiayu,HAN Yu,WANG Kaimin,XU Yucheng,GHEN Jinsong |
| (Center for Geospatial Information, Shenzhen Institution of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China; Shenzhen Engineering Laboratory for Big Data Analysis and Application of Ocean Environment, Shenzhen 5l8055, China;Marine Monitoring and Forecasting Center of Shenzhen City, Shenzhen 5l8055, China) |
| Abstract: |
| The seasonal variation of residual currents in adjacent waters of Daya Bay was analyzed based on the longterm current data observed by HF Radar with T_tide toolkit. The results showed that the variation of residual current in adjacent waters of Daya Bay was mainly the types of winter and summer and it changed synchronously with monsoon. The residual current flowed southwest in winter, which lasted from October to March of the next year, and the current velocity had reached more than 30 cm/s. While the residual current flowed northeast in summer, which lasted only from May to August, with velocity up to 23 cm/s. The seasonal variation of residual currents was not only correlated with wind, but also significantly correlated with the seabed topography. Besides, the east Guangdong coastal current and the Pearl River diluent water had regulating effect on the spatial distribution of residual current in adjacent waters of Daya Bay. |
| Key words: marine hydrology residual current HF radar seasonal variation Daya Bay |
