热带海洋学报 ›› 2017, Vol. 36 ›› Issue (4): 35-47.doi: 10.11978/2016118CSTR: 32234.14.2016118

• • 上一篇    下一篇

利用理想模型实验研究涡旋碰撞海岛的过程*

魏子淋1,2(), 薛惠洁1,3(), 覃慧玲1, 耿兵绪1   

  1. 1. 热带海洋环境国家重点实验室(中国科学院南海海洋研究所), 广东 广州510301
    2. 中国科学院大学, 北京100049
    3. 缅因大学, 海洋科学学院, 美国缅因州04469
  • 收稿日期:2016-11-17 修回日期:2017-04-07 出版日期:2017-07-20 发布日期:2017-07-26
  • 作者简介:

    作者简介:魏子淋(1992—), 男, 湖北省宜昌市人, 硕士研究生, 主要从事中尺度涡研究。E-mail:zlwei@scsio.ac.cn

  • 基金资助:
    国家自然科学基金委基金(41476013);中国科学院战略性先导科技专项(XDA11010304)

Using idealized numerical experiment to study an eddy colliding with an island*

Zilin WEI1,2(), Huijie XUE1,3(), Huiling QIN1, Bingxu GENG1   

  1. 1. State Key Laboratory of Tropical Oceanography (South China Sea Institute of Oceanology, Chinese Academy of Sciences), Guangzhou 510301, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
    3. School of Marine Sciences, University of Maine, the State of Marine 04469, USA
  • Received:2016-11-17 Revised:2017-04-07 Online:2017-07-20 Published:2017-07-26
  • Supported by:
    National Natural Science Foundation of China (41476013);Chinese Academy of Sciences Strategic Leading Science and Technology Projects (XDA11010304)

摘要:

利用区域海洋模式(regional ocean modeling system, ROMS)构建理想模型实验来探讨f-平面上涡旋碰撞海岛的过程。结果表明, 在理想模型设定条件下, 当北半球的反气旋式涡旋以一定速度与尺度相当的海岛发生正面碰撞时, 反气旋式涡旋的部分涡度会从涡旋移动方向的左侧“绕”过海岛形成一个新的反气旋式涡旋, 同时, 在碰撞过程中, 会在移动方向碰撞点的右侧形成一个新的气旋式涡旋。在碰撞过程中, 海岛主要起阻挡作用, 产生碰撞方向水流速度的切变导致涡度梯度的增加, 从而使涡旋结构中的正负涡度发生聚集, 导致涡旋结构的改变。

关键词: 涡旋, 海岛, 碰撞, ROMS, 理想实验

Abstract:

In this study, we used the Regional Ocean Modeling System (ROMS) to investigate the interaction of eddy with an island by constructing an idealized numerical experiment on the f-plane. The results are as follows. Under the specified condition of the idealized experiment, when the anticyclonic eddy in the Northern Hemisphere collides with the island of a comparable size, part of the anticyclonic eddy's vorticity bypasses the island from the left side of the moving eddy to form a new anticyclonic eddy. At the same time, a new cyclonic eddy forms on the right side of the eddy. In the colliding process, the island mainly acts as a blocking object to increase the vorticity gradient near collision point and to aggregate the positive and negative vorticity related to the eddy leading to modification of the eddy structure.

Key words: eddy, island, collision, ROMS, idealized experiment

中图分类号: 

  • P731.2