Configuration and spin-up of ACCESS-CM2, the new generation Australian Community Climate and Earth System Simulator Coupled Model
Configuration and spin-up of ACCESS-CM2, the new generation Australian Community Climate and Earth System Simulator Coupled Model
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DOI：
10.1071/es19040
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发表时间：
2020-10-08
影响因子：
3.6
通讯作者：
Heerdegen, Aidan
中科院分区：
文献类型：
--
作者：
Bi, Daohua;Dix, Martin;Heerdegen, Aidan
澳大利亚社区气候和地球系统模拟器耦合模式的新版本ACCESS-CM2已被开发用于广泛的气候模拟研究和应用。特别是，ACCESS-CM2是澳大利亚对世界气候研究计划的耦合模式对比项目第六阶段(CMIP6)的贡献之一。与我们CMIP5提交使用的ACCESS1.3模型相比，所有模型组件都进行了升级，耦合框架(OASIS3-MCT)和实验控制系统(Rose/CyLC)也进行了升级。分量模式为：大气为UM10.6GA7.1，陆地为CABLE2.5，海洋为MOM5，海冰为CICE5.1.2。本文描述了Access-CM2的模型结构，记录了实验装置，并与(重建的)观测和ACCESS1.3结果进行了比较，评估了工业化前旋转模拟的模型性能。虽然两代ACCESS耦合模式的性能基本相当，但ACCESS-CM2模式表现出更好的全球水文平衡，更真实的海水性质(在空间分布方面)和南大洋经向翻转环流，但对南极海冰的模拟较差，大气顶部的能量不平衡更大。这种能量不平衡反映了全球海洋在自旋期内明显变暖的趋势。
A new version of the Australian Community Climate and Earth System Simulator coupled model, ACCESS-CM2, has been developed for a wide range of climate modelling research and applications. In particular, ACCESS-CM2 is one of Australia's contributions to the World Climate Research Programme's Coupled Model Intercomparison Project Phase 6 (CMIP6). Compared with the ACCESS1.3 model used for our CMIP5 submission, all model components have been upgraded as well as the coupling framework (OASIS3-MCT) and experiment control system (Rose/Cylc). The component models are: UM10.6 GA7.1 for the atmosphere, CABLE2.5 for the land surface, MOM5 for the ocean, and CICE5.1.2 for the sea ice. This paper describes the model configuration of ACCESS-CM2, documents the experimental set up, and assesses the model performance for the preindustrial spin-up simulation in comparison against (reconstructed) observations and ACCESS1.3 results. While the performance of the two generations of the ACCESS coupled model is largely comparable, ACCESS-CM2 shows better global hydrological balance, more realistic ocean water properties (in terms of spatial distribution) and meridional overturning circulation in the Southern Ocean but a poorer simulation of the Antarctic sea ice and a larger energy imbalance at the top of atmosphere. This energy imbalance reflects a noticeable warming trend of the global ocean over the spin-up period.