The Xiamen Symposium on Marine Environmental Sciences (XMAS 2025)

Based on the SCHISM (Semi-implicit Cross-scale Hydroscience Integrated System Model)ocean model, a series of numerical experiments are carried out based on multi-source data. Using tidal harmonic analysis method, the harmonic constants for four constituents (M₂, S₂, K₁, and O₁), and their relative cotidal charts are generated. Additionally, the location of the no-tide point is compared with the outcomes of previous studies. The results obtained through a comparison with harmonic constants from 114 tide gauge stations indicate that the tidal model can effectively simulate tidal characteristics in the China seas. The harmonic constants are verified by 114 coastal tide gauge stations and FES2014 tidal model. Moreover, the influence of self-attraction loading (SAL) tides on tidal simulations is further quantitatively examined, the findings demonstrate that SAL effect significantly influences the M₂ component tide, resulting in an amplitude impact exceeding 20mm in both Zhejiang and Fujian regions. In addition, this study includes sensitive experiments investigating the effects of altering resolution and incorporating shallow water constituents by validating the model using three tide gauge stations near Dongtou District in Wenzhou City. It’s noteworthy that improving model resolution from 3km to 100m can enhance simulation accuracy by approximately 30%, whereas the inclusion of shallow water constituents only results in an improvement of up to about 8% in certain areas.

基于SCHISM（Semi-implicit Cross-scale Hydroscience Integrated System Model，半隐式跨尺度水科学集成系统模型）海洋模型，基于多源数据进行了一系列数值试验。使用潮汐谐波分析方法，生成四种成分（M₂、S₂、K₁ 和 O₁）的谐波常数及其相对曲线图。此外，将禁潮点的位置与以前的研究结果进行了比较。通过与 114 个验潮站的谐波常数进行比较得到的结果表明，潮汐模型可以有效地模拟中国海域的潮汐特征。谐波常数由 114 个沿海潮汐测站和 FES2014 个潮汐模型验证。此外，进一步定量研究了自吸引载荷 （SAL） 潮汐对潮汐模拟的影响，结果表明 SAL 效应显着影响 M₂ 分量潮汐，导致浙江和福建地区振幅影响超过 20 mm。此外，本研究还包括敏感实验，通过使用温州市洞头区附近的三个验潮站验证模型，调查改变分辨率和纳入浅水成分的影响。值得注意的是，将模型分辨率从 3 公里提高到 100 米可以将模拟精度提高约 30%，而包含浅水成分只能在某些区域提高约 8%。
 

numerical simulation, tides