| 基于FVCOM的南海北部海域潮汐潮流数值模拟 |
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| 引用本文： | 杨万康,尹宝树,杨德周,徐振华.基于FVCOM的南海北部海域潮汐潮流数值模拟[J].海洋科学,2013,37(9):10-19. |
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| 作者姓名： | 杨万康 尹宝树 杨德周 徐振华 |
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| 作者单位： | 中国科学院 海洋研究所；中国科学院 环流与波动实验室；中国科学院 研究生院;中国科学院 海洋研究所；中国科学院 环流与波动实验室;中国科学院 海洋研究所；中国科学院 环流与波动实验室;中国科学院 海洋研究所；中国科学院 环流与波动实验室 |
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| 基金项目： | 国家自然科学青年基金(41106017); 国家自然科学基金重点基金(41030855) |
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| 摘 要： | 基于非结构三角形网格的FVCOM(finite-volume coastal ocean model )数值模型, 对南海北部海域的潮汐、潮流进行了精细化数值模拟研究, 并根据模拟结果详细分析了M2, S2, K1, O1 分潮的潮汐和潮流特征。研究结果表明: 神泉港到甲子港海域表现为正规全日潮性质, 珠江口附近海区潮汐以不正规半日潮为主, 其他海域主要表现为不规则全日潮; 陆架海域和深水海域主要表现为往复流, 陆架坡折区存在较强的旋转流, 陆架坡折区为不规则半日潮流和不规则全日潮流的分界线; 东沙群岛附近海域以不规则全日潮流为主, 旋转方向为顺时针; 整个海域的最大流速分布与等深线基本平行, 东沙群岛附近速度明显变大, 最大值出现在台湾浅滩附近, 最大值超过70 cm/s; 南海潮波系统以巴士海峡传入的大洋潮波为主, 分为三支潮流, 以不同的形式进出南海北部海域; 余流在台湾浅滩附近达到最大, 超过6 cm/s, 自南向北进入台湾海峡, 近岸余流自东向西沿岸流动。本研究在东沙群岛周边的模拟结果与前人基于实测资料的分析吻合较好, 并且由于采用了高精度的三角网格, 本文对东沙群岛周边海域的潮汐潮流结构和性质的刻画和分析是迄今为止较为精细的, 同时本研究还提高了对沿岸验潮站调和常数的模拟精度。
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| 关 键 词： | 南海北部 FVCOM(finite-volume coastal ocean model) 潮汐 潮流 陆架坡折区 |
| 收稿时间： | 2012/4/16 0:00:00 |
| 修稿时间： | 2013/7/30 0:00:00 |
Application of FVCOM in numerical simulation of tide and tidal currents in the northern South China Sea |
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| Abstract: | A high resolution hydrodynamic model was established using an unstructured triangular grid, FVCOM(finite-volume coastal ocean model)to study the tides and tidal currents of the northern South China Sea. The simulation results were in good agreement with observation data. According to the simulation results, the tidal and tidal currents characteristics of M2, S2, K1, O1 was analyzed. With the application of high resolution triangular gird, the characteristics of tide and tidal currents around the Dongsha Islands were computed exactly and analyzed in detail. The simulated tidal constituents were more accurate than previous study. The results showed that the areas between the Shenquan Port and the Jiazi Port were dominated by regular diurnal tide and the Zhujiang River Estuary was expressed irregular semi-diurnal tide. The tidal characteristic of other areas were irregular diurnal tide. The continental shelf area was dominated by rectilinear, while the area near continental slope was characterized by strong rotary current. The shelf break area is the boundary between irregular diurnal and irregular semi-diurnal tidal currents. Dongsha areas were dominated by irregular diurnal tidal currents in which the currents rotate clockwise. The distributions of the maximum possible current velocities were paralleled with the depth. The possible velocity was especially high around the Dongsha Islands and the maximum velocity could reach 70 cm/s near the Taiwan Strait. For the northern South China Sea, the tidal motion was maintained by the ocean tides from the the Bashi Channel, which were divided into three different forms out of the northern South China Sea; The maximum residual current appeared on the west of the Taiwan Strait, which flowed into the Taiwan Strait from south to north at a speed of 6 cm/s. The coastal residual current flowed along the China Shore from east to west. |
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| Keywords: | the northern South China Sea FVCOM (finite-volume coastal ocean model) tide tide current shelf break area |
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