【摘要】：基于FVCOM海洋數(shù)值模式,采用非結(jié)構(gòu)三角形網(wǎng)格較好地刻畫了臺(tái)灣海峽復(fù)雜的岸線邊界及海底地形,建立了臺(tái)灣海峽的三維潮汐潮流數(shù)值模型.模擬結(jié)果同長(zhǎng)期觀測(cè)資料符合良好,較好地反映出臺(tái)灣海峽內(nèi)潮汐、潮流運(yùn)動(dòng)的變化狀況和分布特征,利用T_tide工具包進(jìn)行水位潮流調(diào)和分析給出了M2、S2、K1、O1四個(gè)主要分潮的同潮圖、表層潮流橢圓分布.分析表明,M2分潮由臺(tái)灣島南北兩端傳入臺(tái)灣海峽,兩支潮波在澎湖—臺(tái)灣淺灘南緣相遇,呈NE—SW向傾斜,振幅最大值為2.45m,出現(xiàn)在福建省湄洲灣、興化灣一帶.K1分潮潮波由東北向西南傳入,并向南海傳播,傳播方向上右側(cè)振幅較左側(cè)大0.05m.臺(tái)灣海峽存在一條分潮潮流橢圓率為0的分隔線,該分隔線大致呈NE—SW走向,分隔線上半部分潮流橢圓旋轉(zhuǎn)方向?yàn)槟鏁r(shí)針方向,下半部分為順時(shí)針方向.四個(gè)主要分潮潮流橢圓長(zhǎng)軸基本呈NE—SW走向,但在臺(tái)灣淺灘表層潮流橢圓長(zhǎng)軸方向?yàn)镹W—SE向,澎湖水道呈N—S向.臺(tái)灣淺灘處四個(gè)分潮的潮流橢圓均較大,對(duì)應(yīng)的潮流也強(qiáng),可能受當(dāng)?shù)厮钶^淺的影響.
[Abstract]:Based on the FVCOM ocean numerical model, the complex shoreline boundary and seabed topography of the Taiwan Strait are well described by using unstructured triangular meshes, and the three-dimensional tidal current numerical model of the Taiwan Strait is established. The simulation results are in good agreement with the long-term observation data. The variation and distribution characteristics of tidal and tidal movements in the Taiwan Strait are well reflected. The harmonic analysis of water level and tidal current in the Taiwan Strait is carried out by using T_tide toolkit, and the results of M _ 2, S _ 2, K _ 1 are given. O1 the cotidal diagram of the four main tidal components and the ellipse distribution of the surface tidal current. The analysis shows that the M2 component flows into the Taiwan Strait from the north and south ends of Taiwan Island, and the two tidal waves meet at the southern margin of the Penghu-Taiwan Shoal, with a NE-SW tilt and a maximum amplitude of 2.45m, which appears in Meizhou Bay, Fujian Province. In Xinghua Bay, the tidal wave K _ 1 was transmitted from northeast to southwest and spread to the South China Sea. The amplitude on the right side was 0.05m higher than that on the left. There is a separation line with a tidal current ellipse ratio of 0 in the Taiwan Strait. The separation line is approximately NE-SW-trending. The upper half of the separation line rotates counterclockwise and the lower part of the separation line is clockwise. The long axis of the ellipse of the four main tidal currents basically shows the trend of NE-SW, but the direction of the ellipse of the surface tidal current of the Taiwan Shoal is NW-SE, and the direction of the Penghu waterway is N S. The tidal current ellipse of the four sub-tides in the Taiwan shallow beach is large, and the corresponding tidal current is also strong, which may be affected by the shallow water depth.
【作者單位】： 廈門藍(lán)海天信息技術(shù)有限公司;
【基金】：廈門市科技計(jì)劃資助項(xiàng)目(3502Z20151224)
【分類號(hào)】：P731.23

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