Preprints
https://doi.org/10.5194/gmd-2022-52
https://doi.org/10.5194/gmd-2022-52
Submitted as: model evaluation paper
15 Mar 2022
Submitted as: model evaluation paper | 15 Mar 2022
Status: this preprint is currently under review for the journal GMD.

The development and validation of a global 1/32° surface wave-tide-circulation coupled ocean model: FIO-COM32

Bin Xiao1,2,3, Fangli Qiao1,2,3, Qi Shu1,2,3, Xunqiang Yin1,2,3, Guansuo Wang1,2,3, and Shihong Wang1,2,3 Bin Xiao et al.
  • 1First Institute of Oceanography, and Key Laboratory of Marine Science and Numerical Modeling, Ministry of Natural Resources, Qingdao 266061, China
  • 2Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology, Qingdao 266237, China
  • 3Shandong Key Laboratory of Marine Science and Numerical Modeling, Qingdao 266061, China

Abstract. Model resolution and the included physical processes are two of the most important factors that determine the realism of the ocean model simulations. In this study, a new global surface wave-tide-circulation coupled ocean model FIO- COM32 with resolution of 1/32° × 1/32° is developed and validated. Promotion of the horizontal resolution from 1/10° to 1/32° leads to significant improvements of the simulations of surface eddy kinetic energy (EKE), fine structures of sub- mesoscale to mesoscale movements and the accuracy of simulated global tide. The non-breaking surface wave-induced mixing (Bv) is proved to be an important contributor that improves the agreement of the simulated summer mixed layer depth (MLD) of the model and the Argo observations even with high horizontal resolution of 1/32°, the mean error of the simulated mid-latitude summer MLD is reduced from -4.8 m in numerical experiment without Bv to -0.6 m in experiment with Bv. With the global tide is included, the global distributions of internal tide can be explicitly simulated in this new model and is comparable to the satellite observations. Comparisons using Jason3 along-track sea surface height (SSH) wave-number spectral slopes of mesoscale ranges show that internal tide induced SSH undulations is a key factor contributing to the substantially improved agreement of model and satellite observations in the low latitude and low EKE regions. For ocean model community, surface wave, tidal current and ocean circulation have been separating into different streams for more than half century. It should be the time to merge these streams for new generation ocean model development.

Bin Xiao et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on gmd-2022-52', Baylor Fox-Kemper, 07 Apr 2022
  • RC2: 'Comment on gmd-2022-52', Anonymous Referee #2, 19 Apr 2022
  • RC3: 'Comment on gmd-2022-52', Anonymous Referee #3, 03 May 2022

Bin Xiao et al.

Bin Xiao et al.

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Short summary
A new global surface wave-tide-circulation coupled ocean model FIO-COM32 with resolution of 1/32° × 1/32° is developed and validated. Both the promotion of the horizontal resolution and included physical processes are proved to be important contributors to the significant improvements of FIO-COM32 simulations. It should be the time to merge these separated model components (surface wave, tidal current and ocean circulation) for new generation ocean model development.