The performance of a z-level ocean model in modeling the global tide

作     者：XIAO Bin QIAO Fangli SHU Qi 

作者机构：College of Oceanic and Atmospheric Sciences Ocean University of China The First Institute of OceanographyState Oceanic Administration Laboratory for Regional OceanographyNumerical Modeling Qingdao National Laboratory for Marine Science and Technology 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2016年第35卷第11期

页      面：35-43页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 0908[农学-水产] 0707[理学-海洋科学] 

基　　金：The National Natural Science Foundation of China(NSFC)-Shandong Joint Fund for Marine Science Research Centers under contract No.U1406404 the National Natural Science Foundation of China under contract No.41406027 the National Basic Research Program(973 Program)of China under contract No.2010CB950300 the Project of Comprehensive Evaluation of Polar Areas on Global and Regional Climate Changes under contract No.CHINARE04-04 

主　　题：global tide Modular Ocean Model global tidal energy flux 

摘      要：The performance of a z-level ocean model, the Modular Ocean Model Version 4（MOM4）, is evaluated in terms of simulating the global tide with different horizontal resolutions commonly used by climate models. The performance using various sets of model topography is evaluated. The results show that the optimum filter radius can improve the simulated co-tidal phase and that better topography quality can lead to smaller rootmean square（RMS） error in simulated tides. Sensitivity experiments are conducted to test the impact of spatial resolutions. It is shown that the model results are sensitive to horizontal resolutions. The calculated absolute mean errors of the co-tidal phase show that simulations with horizontal resolutions of 0.5° and 0.25° have about 35.5% higher performance compared that with 1° model resolution. An internal tide drag parameterization is adopted to reduce large system errors in the tidal amplitude. The RMS error of the best tuned 0.25° model compared with the satellite-altimetry-constrained model TPXO7.2 is 8.5 cm for M_2. The tidal energy fluxes of M_2 and K_1 are calculated and their patterns are in good agreement with those from the TPXO7.2. The correlation coefficients of the tidal energy fluxes can be used as an important index to evaluate a model skill.