地球系统模式CAS-ESM  

Earth System Model:CAS-ESM

作　　者：周广庆[1] 张云泉[2] 姜金荣[3] 张贺[1] 吴保东 曹杭 王天一[3] 郝卉群 朱家文[1] 袁良[2] 张明华[1] Zhou Guangqing;Zhang Yunquan;Jiang Jinrong;Zhang He;Wu Baodong;Cao Hang;Wang Tianyi;Hao Huiqun;Zhu Jiawen;Yuan Liang;Zhang Minghua(Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China;Institute of Computing Technology,Chinese Academy of Sciences,Beijing 100190,China;Computer Network Information Center,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中国科学院大气物理研究所,北京100029 [2]中国科学院计算技术研究所,北京100190 [3]中国科学院计算机网络信息中心,北京100190

出　　处：《数据与计算发展前沿》2020年第1期38-54,共17页Frontiers of Data & Computing

基　　金：国家重点研发计划(2016YFB0200800);中国科学院战略科技先导专项(XDA19020202)。

摘　　要：【目的】本文介绍了中国科学院地球系统模式CAS-ESM的发展、构成及性能优化,着重介绍了在并行计算优化方面的工作。【方法】基于CAS-ESM1.0,在大气和海洋模式上,就并行剖分、跳点差分算法、并行计算通信开展了一系列的优化研究,显著提升模式的并行加速比和并行效率。开发了用于耦合集成的软件平台,并通过一系列的物理参数化方案的改进,提高了各分量模式的模拟性能,以此形成了CAS-ESM2.0。【结果】新系统在运行效率和模拟精度上都较CAS-ESM1.0有显著提升,实现了我国境内首个全球地表CO2浓度分布及其季节变化的全耦合模拟。CAS-ESM2.0将参加国际耦合模式比较计划CMIP6的有关试验,并提供有关模拟结果的数据共享。[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 threedimensional 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-ESM 2.0 is set up after applying parameterization improvements to component models in many aspects.[Results]Compared with CAS-ESM 1.0,CAS-ESM 2.0 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.

关 键 词：地球系统 模式 CAS-ESM 并行计算 CMIP 

分 类 号：P3[天文地球—地球物理学]