Abstract
As a member of the Chinese modeling groups, the coupled ocean-ice component of the Chinese Academy of Sciences’ Earth System Model, version 2.0 (CAS-ESM2.0), is taking part in the Ocean Model Intercomparison Project Phase 1 (OMIP1) experiment of phase 6 of the Coupled Model Intercomparison Project (CMIP6). The simulation was conducted, and monthly outputs have been published on the ESGF (Earth System Grid Federation) data server. In this paper, the experimental dataset is introduced, and the preliminary performances of the ocean model in simulating the global ocean temperature, salinity, sea surface temperature, sea surface salinity, sea surface height, sea ice, and Atlantic Meridional Overturning Circulation (AMOC) are evaluated. The results show that the model is at quasi-equilibrium during the integration of 372 years, and performances of the model are reasonable compared with observations. This dataset is ready to be downloaded and used by the community in related research, e.g., multi-ocean-sea-ice model performance evaluation and interannual variation in oceans driven by prescribed atmospheric forcing.
Highlights
The ocean covers more than 70% of the entire surface of the Earth and contains more than 95% of the Earth’s water that participates in the hydrological cycle
To compare the behaviors of different ocean models and understand the origin of model biases in phase 6 of the Coupled Model Intercomparison Project (CMIP6), the Ocean Model Intercomparison Project (OMIP), an endorsed sub-project of CMIP6, was proposed (Griffies et al, 2016), which provides an experimental protocol for global ocean/sea-ice simulations forced with common atmospheric datasets
Because the Ocean Model Intercomparison Project Phase 1 (OMIP1) experiments are conducted by the ocean–ice coupled model component of the Chinese Academy of Sciences’ Earth System Model, version 2.0 (CAS-ESM2.0), we mainly focus on OMIP1 in this paper
Summary
The ocean covers more than 70% of the entire surface of the Earth and contains more than 95% of the Earth’s water that participates in the hydrological cycle. To compare the behaviors of different ocean models and understand the origin of model biases in phase 6 of the Coupled Model Intercomparison Project (CMIP6), the Ocean Model Intercomparison Project (OMIP), an endorsed sub-project of CMIP6, was proposed (Griffies et al, 2016), which provides an experimental protocol for global ocean/sea-ice simulations forced with common atmospheric datasets. The Co-ordinated Ocean–Ice Reference Experiment II (CORE II) datasets (Large and Yeager, 2009) are applied to force the global ocean/sea-ice models, which is denoted as phase 1 of the physical part of OMIP (OMIP1). Because the OMIP1 experiments are conducted by the ocean–ice coupled model component of the Chinese Academy of Sciences’ Earth System Model, version 2.0 (CAS-ESM2.0), we mainly focus on OMIP1 in this paper. The coupled ocean–ice component of CAS-ESM2.0 will participate in the OMIP1 experiment, and datasets will be released to CMIP6 for researchers worldwide. The remainder of the paper is structured as follows: Section 2 describes the model and experimental design; section 3 gives a basic technical validation of OMIP1; a summary is provided in section 4; and section 5 offers usage notes
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