Frontiers of Data and Computing ›› 2020, Vol. 2 ›› Issue (1): 38-54.doi: 10.11871/jfdc.issn.2096-742X.2020.01.004

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Earth System Model: CAS-ESM

Zhou Guangqing1,*(),Zhang Yunquan2,Jiang Jinrong3,Zhang He1,Wu Baodong2,Cao Hang2,Wang Tianyi3,Hao Huiqun3,Zhu Jiawen1,Yuan Liang2,Zhang Minghua1,*()   

  1. 1. Institute of Atmospheric Physics, Chinese Academy of Sciences,Beijing 100029, China
    2. Institute of Computing Technology, Chinese Academy of Sciences,Beijing 100190, China
    3. Computer Network Information Center, Chinese Academy of Sciences,Beijing 100190, China
  • Received:2020-01-03 Online:2020-02-20 Published:2020-03-28
  • Contact: Zhou Guangqing,Zhang Minghua E-mail:zhgq@mail.iap.ac.cn;minghua.zhang2@yahoo.com

Abstract:

[Objective] The development and performance optimizations, especially on parallel computations, of the Earth System Model of Chinese Academy of Sciences (CAS-ESM) are introduced in this paper. [Methods] Based on CAS-ESM1.0, a series of computing optimizations are conducted such as three-dimensional parallel decomposition, leap finite-difference algorithm and communication-avoiding method in atmospheric and oceanic component models, showing obvious improvements in parallel computational speed and efficiency of the models. Also, a platform for coupling and application of Earth System Model is developed. In addition, CAS-ESM2.0 is set up after applying parameterization improvements to component models in many aspects. [Results] Compared with CAS-ESM1.0, CAS-ESM2.0 presents a distinct advance not only in computation efficiency but also in climate simulation results. Besides, it is able to reproduce the global surface CO2 distribution and its seasonal variation by this fully coupled model. CAS-ESM2.0 will take CMIP6 experiments and its simulation data will be opened and shared.

Key words: earth system, model, CAS-ESM, parallel computation, CMIP