An assessment of global ocean tide simulation by a coupled climate model FGOALS-g3

Huang Xinyu; Wang Caixia; Wei Jilin; Yu Zipeng; Tian Zhiwei; Liu Hailong

doi:10.12284/hyxb2024091

Volume 46 Issue 8

Sep. 2024

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Huang Xinyu，Wang Caixia，Wei Jilin, et al. An assessment of global ocean tide simulation by a coupled climate model FGOALS-g3[J]. Haiyang Xuebao，2024, 46(8)：63–73 doi: 10.12284/hyxb2024091

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Huang Xinyu，Wang Caixia，Wei Jilin, et al. An assessment of global ocean tide simulation by a coupled climate model FGOALS-g3[J]. Haiyang Xuebao，2024, 46(8)：63–73 doi: 10.12284/hyxb2024091

Citation:

Huang Xinyu，Wang Caixia，Wei Jilin, et al. An assessment of global ocean tide simulation by a coupled climate model FGOALS-g3[J]. Haiyang Xuebao，2024, 46(8)：63–73 doi: 10.12284/hyxb2024091

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An assessment of global ocean tide simulation by a coupled climate model FGOALS-g3

doi: 10.12284/hyxb2024091

1.
Key Laboratory of Physical Oceanography, Ministry of Education, Ocean University of China, Qingdao 266100, China
2.
State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
3.
Laoshan Laboratory, Qingdao 266237, China

Received Date: 2024-01-18
Rev Recd Date: 2024-07-30

Available Online: 2024-08-12

Publish Date: 2024-09-26

Abstract

Abstract

Tides act an important role in the transfer of ocean energy and mixing, and provide the main energy to maintain the global thermohaline circulation and influence the global ocean circulation. Previous work has explored the sensitivity of ocean circulation states to tidal forcing within an individual ocean model at a low resolution. To further investigate the influence of tidal forcing on ocean circulation and climate states, it is imperative to incorporate the tidal forcing into a coupled climate model. In this paper, the eight major equilibrium constituents are included into the coupled climate model FGOALS-g3 explicitly, and we evaluate its ability to simulate global ocean tides, which lays the basic for the further research on the influence of tidal forcing on large-scale circulation and climate states.We apply tidal harmonic analysis on the sea surface height data to obtain the harmonic constants of each constituent, and compare the model results with the global tidal models TPXO9 and FES2014, and the open ocean tide dataset from st102. The results show that the coupled model FGOALS-g3 can effectively simulate the barotropic tides in the global ocean, with relatively small errors compared to the global tidal models and the observation dataset. Compared with these two global tidal models, the mean square error is relatively small, and the errors are mostly distributed in the region of larger amplitudes. And compared with st102 dataset, the average amplitude relative errors of the eight major equilibrium constituents simulated by FGOALS-g3 are all less than 10%, and the total mean square errors are all less than 10 cm.
- barotropic tide,
- coupled climate model,
- harmonic analysis

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References(44)

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