热带海洋学报

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孟加拉湾陆架对潮汐的影响研究

徐一凯,胡松,朱宇航,王飞,张春玲   

  1. 上海海洋大学海洋科学学院,上海 201306

  • 收稿日期:2022-05-23 修回日期:2022-07-16 出版日期:2022-08-02 发布日期:2022-08-02
  • 通讯作者: 胡松
  • 基金资助:

    国家重点研发计划子课题(2021YFC3101702)

Impacts of continental shelf on tide of the Bay of Bengal

XU Yikai, HU Song, ZHU Yuhang, WANG FeiZHANG Chunling   

  1. College of Marine Science, Shanghai Ocean University, Shanghai 201306, China

  • Received:2022-05-23 Revised:2022-07-16 Online:2022-08-02 Published:2022-08-02
  • Contact: Song HU
  • Supported by:

    National Key Research and Development program sub-project (2021YFC3101702)

摘要: 孟加拉湾典型地形对潮汐的影响机制尚未得到深入研究,故本文基于FVCOM(Finite-Volume Community Ocean Model)设置了一组控制试验和三组对照试验,通过数值试验手段理解湾顶和两侧陆架地形,以及陆架区域显著的峡谷地形对该区域潮汐的影响机制。试验结果显示:恒河峡谷有利于减小峡谷附近的潮波振幅,但对湾顶潮差影响不大;顶部陆架宽度有助于增大潮波振幅,增大湾顶的潮差;东侧陆架有助于增强开尔文波,增大湾顶潮差,但是影响不如顶部的陆架显著;西侧陆架仅对西部局地有影响,但对整体同潮图分布影响较小。

关键词: 孟加拉湾, 陆架, FVCOM, 潮汐, 数值试验

Abstract: The influence mechanism of the typical topography of the Bay of Bengal on the tide has not been fully studied. Therefore, this study sets up a group of control experiment and three groups of comparative experiments based on FVCOM (Finite-Volume Community Ocean Model) to understand the influence mechanism of the north, west and east continental shelf topography, as well as the influence of the most visible canyon topography in the continental shelf area on the tide. The results show that the Ganga Trough will reduce the amplitude of tidal wave near the canyon, but has little effect on the tidal range at the head of the bay; the width of the top shelf is helpful to increase the amplitude of tidal wave and the tidal range at the head of the bay; the eastern continental shelf helps to enhance Kelvin wave and increase the tidal range at the top of the bay, but the impact is not as significant as that on the top shelf; and the western continental shelf only has an impact on the western region, but has little impact on the co-tidal distribution of the whole area.

Key words: Bay of Bengal, continental shelf, FVCOM, tide, numerical experiments