A Coupled Experiment with LICOM2 as the Ocean Component of CESM1

• Published in: Acta meteorologica Sinica Vol. 30; no. 1; pp. 76 - 92
• Main Author: 林鹏飞 刘海龙 薛巍 李慧岷 王夫常 张明华
• Format: Journal Article
• Language: English
• Published: Beijing The Chinese Meteorological Society 01.02.2016; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China%Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China%Computer Network Information Center, Chinese Academy of Sciences, Beijing 100190, China
• Subjects: Atmospheric Protection/Air Quality Control/Air Pollution; Atmospheric Sciences; Earth and Environmental Science; Earth Sciences; Geophysics and Environmental Physics; Marine; Meteorology; 地球系统; 大气模型; 太平洋年代际振荡; 工业实验; 成分; 气候系统; 海洋模型; 耦合模型; coupled model; LICOM2; climate system; CESM1; simulation
• ISSN: 2095-6037; 0894-0525; 2198-0934; 2191-4788
• DOI: 10.1007/s13351-015-5045-3

In the present study, the LASG/IAP Climate system Ocean Model version 2 （LICOM2） was implemented to replace the original ocean component in the Community Earth System Model version 1.0.4 （CESM1） to form a new coupled model referred to as CESMI＋LICOM2. The simulation results from a 300-yr prein- dustrial experiment by using this model were evaluated against both observations and the Flexible Global Ocean-Atmosphere-Land System Model with grid-atmospheric model version 2 （FGOALS-g2）. It was found that CESMI＋LICOM2 simulates well the mean features of the ocean, sea ice, and atmosphere, relative to models used in the Coupled Model Intercomparison Experiment （CMIP5）, when compared with obser- vations. The spatial distribution of SST bias in CESMI＋LICOM2 is similar to that in the Community Climate System Model version 4 （CCSM4）. The simulated climate variabilities, such as ENSO and Pacific decadal oscillation, are also reasonably simulated when compared with observations. The successful implementation of LICOM2 in the CESM1 framework greatly enhances the capability of LICOM2 in conducting high-resolution simulations and model tuning. Compared with FGOALS-g2, the simulations of both SST and Atlantic meridional overturning circulation are significantly improved in CESMI~LICOM2. The former can be mainly attributed to the atmospheric model, and the latter to the improvement in the parameterization of diapycnal mixing. The study provides a base to further improve the present version of LICOM and its functionalities in the coupled model FGOALS at both low and high resolutions.