Eddy-resolving Simulation of CAS-LICOM3 for Phase 2 of the Ocean Model Intercomparison Project
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Eddy-resolving Simulation of CAS-LICOM3 for Phase 2 of the Ocean Model Intercomparison Project Yiwen LI1,2, Hailong LIU1,2, Mengrong DING1,2, Pengfei LIN*1,2, Zipeng YU1,2, Yongqiang YU1,2, Yao MENG1,2, Yunlong LI3, Xiaodong JIAN3, Jinrong JIANG4, Kangjun CHEN1, Qian YANG1,2, Yaqi WANG1,2, Bowen ZHAO1,2, Jilin WEI1,2, Jinfeng MA1, Weipeng ZHENG1,2, and Pengfei WANG1 1State
Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
2College
of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China 3National
4Computer
Supercomputer Center in Tianjin, Tianjin 300457, China
Network Information Center, Chinese Academy of Sciences, Beijing 100190, China (Received 5 March 2020; revised 24 June 2020; accepted 10 July 2020) ABSTRACT
A 61-year (1958–2018) global eddy-resolving dataset for phase 2 of the Ocean Model Intercomparison Project has been produced by the version 3 of Chinese Academy of Science, the State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics/Institute of Atmospheric Physics (LASG/IAP) Climate system Ocean Model (CAS-LICOM3). The monthly and a part of the surface daily data in this study can be accessed on the Earth System Grid Federation (ESGF) node. Besides the details of the model and experiments, the evolutions and spatial patterns of large-scale and mesoscale features are also presented. The mesoscale features are reproduced well in the high-resolution simulation, as the mesoscale activities can contribute up to 50% of the total SST variability in eddy-rich regions. Also, the large-scale circulations are remarkably improved compared with the low-resolution simulation, such as the climatological annual mean SST (the RMSE is reduced from 0.59°C to 0.47°C, globally) and the evolution of Atlantic Meridional Overturning Circulation. The preliminary evaluation also indicates that there are systematic biases in the salinity, the separation location of the western boundary currents, and the magnitude of eddy kinetic energy. All these biases are worthy of further investigation. Key words: eddy-resolving dataset, mesoscale eddies, CAS-LICOM3, OMIP Citation: Li, Y. W., and Coauthors, 2020: Eddy-resolving simulation of CAS-LICOM3 for phase 2 of the Ocean Model Intercomparison Project.. Adv. Atmos. Sci., 37(10), 1067−1080, https://doi.org/10.1007/s00376-020-0057-z.
1. Background and Summary To understand the origin of model biases in phase 6 of the Coupled Model Intercomparison Project (CMIP6), the Ocean Model Intercomparison Project (OMIP; Griffies et al., 2016) was proposed to trace the coupled model biases in ocean–sea-ice models. Recently, the protocol of OMIP has been updated and two kinds of OMIP experiments forced by two different datasets have been proposed. Phase 1 of OMIP (OMIP-1) is forced by the CORE-II dataset (Large and Yeager, 2009), mainly derived fro
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