Multi-scale tide open boundary optimizing and forecasting method

The invention belongs to the technical field of shallow sea environment data reanalysis and forecasting, and relates to a multi-scale tide open boundary optimization and forecasting method. According to the method, the harmonic constants of the open boundary of the partial tide flow in the numerical mode are optimized, the optimal open boundary condition of the tide is sought by calculating the adjustment coefficient factors corresponding to the harmonic constants and Fourier series expansion of the adjustment coefficient factors based on observation data, the tide simulation error is reduced, and the tide flow forecast data with higher precision are provided; data support is provided for engineering decisions such as production and life, traffic and transportation; and step-by-step recursive optimization is realized, so that the required calculation amount is greatly reduced, and the optimization effect is improved. 本发明属于浅海环境数据再分析和预报技术领域，本发明涉及一种多尺度潮汐开边界优化及预报方法。本发明优化数值模式分潮潮流开边界调和常数，基于观测数据，通过对调和常数对应的调整系数因子及其傅里