Description and climate simulation performance of CAS-ESM version 2
Description and climate simulation performance of CAS-ESM version 2
复制标题
CAS™ESM 第 2 版的描述和气候模拟性能
DOI：
10.1029/2020ms002210
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发表时间：
2020
影响因子：
6.8
通讯作者：
Li Shi
中科院分区：
文献类型：
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作者：
Zhang He;Zhang Minghua;Jin Jiangbo;Fei Kece;Ji Duoying;Wu Chenglai;Zhu Jiawen;He Juanxiong;Chai Zhaoyang;Xie Jinbo;Dong Xiao;Zhang Dongling;Bi Xunqiang;Cao Hang;Chen Huansheng;Chen Kangjun;Chen Xueshun;Gao Xin;Hao Huiqun;Jiang Jinrong;Kong Xianghui;Li Shi
介绍了中国科学院地球系统模式第二版（CAS-ESM 2）的发展过程、优缺点及在耦合模式比对计划（CMIP 6）DECK试验中的气候敏感性。CAS-ESM 2是一个数值模式，用于模拟物理气候系统以及大气化学和碳循环。它是国际模拟界的一个新人，可以提供与其他模式足够独立的气候模拟解决方案。本文介绍了模式在模拟大气和海洋辐射收支、降水、环流、变率和世纪气候变暖等基本状况方面的性能。模型偏差及其可能的原因进行了讨论。强度包括大气和海洋中的水平热量输送，大西洋经向翻转环流的垂直廓线;弱点包括双热带辐合带（ITCZ）和厄尔尼诺-南方涛动（ENSO）的较强振幅，这在许多其他模式中也很常见。模拟的20世纪世纪变暖与其他几个模型的观测结果存在类似的差异20世纪20年代的变暖程度较低，60年代的冷却程度较强，而当时人为气溶胶急剧增加。因此，尽管模型模拟的1980年后变暖趋势的斜率与观测结果相似，但20世纪世纪的变暖约为观测到的变暖的60%。该模式的平衡气候敏感性为3.4 K，具有短波辐射的正云反馈。
The second version of Chinese Academy of Sciences Earth System Model (CAS‐ESM 2) is described with emphasis on the development process, strength and weakness, and climate sensitivities in simulations of the Coupled Model Intercomparison Project (CMIP6) DECK experiments. CAS‐ESM 2 was built as a numerical model to simulate both the physical climate system as well as atmospheric chemistry and carbon cycle. It is a newcomer in the international modeling community to provide sufficiently independent solutions of climate simulations from those of other models. Performances of the model in simulating the basic states of the radiation budget of the atmosphere and ocean, precipitation, circulations, variabilities, and the twentieth century warming are presented. Model biases and their possible causes are discussed. Strength includes horizontal heat transport in the atmosphere and oceans, vertical profile of the Atlantic Meridional Overturning Circulation; weakness includes the double intertropical convergence zone (ITCZ) and stronger amplitude of the El Niño–Southern Oscillation (ENSO) that are also common in many other models. The simulated the twentieth century warming shares a similar discrepancy with observations as in several other models—less warming in the 1920s and stronger cooling in the 1960s than in observation—at the time when there was a steep increase of anthropogenic aerosols. As a result, the twentieth century warming is about 60% of the observed warming despite that the model simulated a similar slope of warming trend after 1980 to observation. The model has an equilibrium climate sensitivity of 3.4 K with a positive cloud feedback from the shortwave radiation.