Abstract
A global eddy-permitting ocean-ice coupled model with a horizontal resolution of 0.25° by 0.25° is established on the basis of Modular Ocean Model version 4 (MOM4) and Sea Ice Simulator (SIS). Simulation results are compared with those of an intermediate resolution ocean-ice coupled model with a horizontal resolution of about 1° by 1°. The results show that the simulated ocean temperature, ocean current and sea ice concentration from the eddy-permitting model are better than those from the intermediate resolution model. However, both the two models have the common problem of ocean general circulation models (OGCMs) that the majority of the simulated summer sea surface temperature (SST) is too warm while the majority of the simulated subsurface summer temperature is too cold. Further numerical experiments show that this problem can be alleviated by incorporating the non-breaking surface wave-induced vertical mixing into the vertical mixing scheme for both eddy-permitting and intermediate resolution models.
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Foundation item: The Key Project of the National Science Foundation of China under contract No. 40730842; the “973” Project of China under contract No. 2010CB950303; the Scientific Research Foundation of the First Institute of Oceanography, State Oceanic Administration of China under contract No. 2011T02; the National Key Technology R&D Program of China under contract No. 2011BAC03B02; the Key Supercomputing Science-Technology Project of Shandong Province of China under contract No. 2011YD01107.
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Shu, Q., Qiao, F., Song, Z. et al. A comparison of two global ocean-ice coupled models with different horizontal resolutions. Acta Oceanol. Sin. 32, 1–11 (2013). https://doi.org/10.1007/s13131-013-0335-z
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DOI: https://doi.org/10.1007/s13131-013-0335-z