浙闽沿岸潮余流的空间变化

doi:10.3969/j.issn.1001-909X.2015.04.003

海洋学研究 ›› 2015, Vol. 33 ›› Issue (4): 30-36.DOI: 10.3969/j.issn.1001-909X.2015.04.003

浙闽沿岸潮余流的空间变化

林其良^1,2, 黄大吉^1,2,3, 宣基亮^1,2

1.卫星海洋环境动力学国家重点实验室,浙江杭州 310012;
2.国家海洋局第二海洋研究所,浙江杭州 310012;
2.浙江大学海洋学院,浙江杭州 310058

收稿日期:2015-05-25 修回日期:2015-07-23 出版日期:2015-12-15 发布日期:2022-11-28
作者简介:林其良(1989-),男,浙江台州市人,主要从事近海动力过程方面的研究。E-mail:635860038@qq.com
基金资助:
国家重点基础研究发展计划项目资助(2011CB409803);国家自然科学基金项目资助(41306025);国家海洋公益性行业科研专项经费项目资助(201205015)

Spatial variation of the tidal residual currents in the coastal area off Zhejiang and Fujian Provinces in the East China Sea

LIN Qi-liang^1,2, HUANG Da-ji^1,2,3, XUAN Ji-liang^1,2

1. State Key Laboratory of Satellite Ocean Environment Dynamics, Hangzhou 310012, China;
2. The Second Institute of Oceanography, SOA, Hangzhou 310012, China;
3. Ocean College, Zhejiang University, Hangzhou 310058, China

Received:2015-05-25 Revised:2015-07-23 Online:2015-12-15 Published:2022-11-28

摘要/Abstract

摘要： 利用非结构网格海洋环流模式(FVCOM),研究了浙闽沿岸潮余流的空间变化及其生成机制。结果表明,浙闽沿岸的潮余流具有明显的水平二维特征。根据潮余流的流速和方向,浙闽沿岸的潮余流可分为3个区域,自东北向西南,依次为区域I、区域II和区域III。区域I和区域III的潮余流较强,前者流速为0.6~2.5 cm/s,方向沿等深线指向西南;后者流速为0.5~1.5 cm/s,方向沿等深线指向东北。区域II的潮余流较弱,均小于0.6 cm/s,方向自岸向海逆时针旋转,离岸较近区域方向指向西南,离岸较远区域方向指向东北。结合浙闽沿岸的潮余流和海底地形进行分析,发现潮余流与地形β效应ddx1H成正比,这与前人研究获得的海底地形对潮流的整流机制相符合,表明浙闽沿岸海域陡峭的海底地形对潮流有明显的整流作用。

关键词: 数值模拟, 潮余流, 地形β效应, 浙闽沿岸

Abstract: A detailed spatial structure of the tidal residual currents (TRCs) in the coastal area off Zhejiang and Fujian Provinces in the East China Sea was simulated by an unstructured grid-volume, three-dimensional, primitive equations ocean model (FVCOM). The simulated TRCs have apparent horizontal 2-D characters. The TRCs were further divided into three regions from north to south according to their velocity and direction, i.e., Region I, Region II and Region III. The TRCs in Region I and Region III are stronger but in opposite direction, flowing along isobaths in the southwestward with a velocity of 0.6~2.5 cm/s and northeastward directions with a velocity of 0.5~1.5 cm/s, respectively. The TRCs in Region II are weaker (less than 0.6 cm/s), and their directions are unticlockwise with the distance away from the coast. The analysis shows that the TRCs are directly proportional to the topographic beta factor ddx1H, this is consistent with the previous studies, and indicates the rectification of tidal currents when they flow over the steep bottom topography.

Key words: numerical simulation, tidal residual currents, topographic beta factor, coastal area off Zhejiang and Fujian Provinces

中图分类号:

P731

林其良, 黄大吉, 宣基亮. 浙闽沿岸潮余流的空间变化[J]. 海洋学研究, 2015, 33(4): 30-36.

LIN Qi-liang, HUANG Da-ji, XUAN Ji-liang. Spatial variation of the tidal residual currents in the coastal area off Zhejiang and Fujian Provinces in the East China Sea[J]. Journal of Marine Sciences, 2015, 33(4): 30-36.

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浙闽沿岸潮余流的空间变化

Spatial variation of the tidal residual currents in the coastal area off Zhejiang and Fujian Provinces in the East China Sea

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