CICE5.0与BCC_CSM2.0模式的耦合及对北极海冰的模拟评估

发布时间：2018-09-10 06:58

【摘要】：本文将美国Los Alamos国家实验室发展的最新海冰模式CICE5.0引入国家气候中心气候系统模式BCC_CSM2.0,替代原有的海冰模式SIS,形成一个新的耦合模式。在此基础上,评估新耦合模式对1985-2009年北极海冰的模拟性能,检验引入CICE5.0后对耦合模式中北极海冰、海洋和大气模拟结果的改进。结果表明,引入CICE5.0后,模式能较好地模拟出北极海冰的空间分布、季节以及年际变化特征。相比于旧版本耦合模式,新耦合模式模拟的北极多年冰增多、一年冰减少,同时,海冰增厚、海冰流速减慢,模拟效果得到显著改进,对波弗特涡流模拟的改善尤为明显。进一步分析发现,相比于SIS,CICE5.0对北极海冰特别是海冰厚度模拟性能的提升,在耦合进入BCC_CSM2.0后,会触发冰-温的正反馈机制,改进了模式对海平面气压场、表层气温和海表温度的模拟,由此进一步提高了模式对北极海冰的模拟能力。
[Abstract]:The latest sea ice model CICE 5.0 developed by Los Alamos National Laboratory of the United States was introduced into the climate system model BCC_CSM 2.0 of the National Climate Center to replace the original sea ice model SIS to form a new coupling model. The results show that CICE 5.0 can well simulate the spatial, seasonal and interannual variations of Arctic sea ice. Compared with the old coupled model, the new coupled model simulates more Arctic perennial ice, less annual ice, thickening sea ice and sea ice. Further analysis shows that, compared with SIS, CICE 5.0 improves the simulation performance of Arctic sea ice, especially sea ice thickness. When coupled into BCC_CSM 2.0, it triggers the positive feedback mechanism of ice-temperature, and improves the model's sea-level pressure field and surface layer. The simulation of temperature and sea surface temperature further enhances the model's ability to simulate Arctic sea ice.
【作者单位】：中国气象局国家气候中心;南京大学大气科学学院;
【基金】：国家重点研发计划“全球变化及应对”重点专项项目(2016YFA0602103) 国家重点基础研究计划973项目(2015CB953900) 公益行业(气象)科研专项(GYHY201506011)
【分类号】：P731.15

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