CAS-ESM2.0 Model Datasets for the CMIP6 Flux-Anomaly-Forced Model Intercomparison Project (FAFMIP)

Abstract

The second version of the Chinese Academy of Sciences Earth System Model (CAS-ESM2.0) is participating in the Flux-Anomaly-Forced Model Intercomparison Project (FAFMIP) experiments in phase 6 of the Coupled Model Intercomparison Project (CMIP6). The purpose of FAFMIP is to understand and reduce the uncertainty of ocean climate changes in response to increased CO 2 forcing in atmosphere-ocean general circulation models (AOGCMs), including the simulations of ocean heat content (OHC) change, ocean circulation change, and sea level rise due to thermal expansion. FAFMIP experiments (including faf-heat, faf-stress, faf-water, faf-all, faf-passiveheat, faf-heat-NA50pct and faf-heat-NA0ct) have been conducted. All of the experiments were integrated over a 70-year period and the corresponding data have been uploaded to the Earth System Grid Federation data server for CMIP6 users to download. This paper describes the experimental design and model datasets and evaluates the preliminary results of CAS-ESM2.0 simulations of ocean climate changes in the FAFMIP experiments. The simulations of the changes in global ocean temperature, Atlantic Meridional Overturning Circulation (AMOC), OHC., and dynamic sea level (DSL), are all reasonably reproduced. 中国科学院地球系统模式2.0版(CAS-ESM2.0)参与了第六次国际耦合模式比较计划(CMIP6)并参加了通量距平强迫模式比较计划(FAFMIP)。FAFMIP试验的目的是理解海洋对二氧化碳增加的响应(包括海洋热含量、海洋环流和海表高度等的变化),从而减小海洋模式响应的不确定性。试验包括全球及北大西洋不同的通量异常强迫试验(faf-heat, faf-stress, faf-water, faf-all, faf-passiveheat, faf-heat-NA50pct and faf-heat-NA0pct),模式积分70年。本文介绍了CAS-ESM2.0参加FAFMIP的试验设计并初步评估了模拟结果,包括全球平均的海温、大西洋经圈翻转环流、海洋热含量、动力海表高度等的变化。结果表明,CAS-ESM2.0能够较为合理地模拟出不同通量异常强迫试验下海洋基本变量的变化。该数据集已发布在CMIP6的ESG数据服务器上,可供从事相关研究的科学家下载使用。