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| 南太平洋副热带偶极子模式模拟评估 |
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王卓越1,2,3,4, 郑建1,3,4, 杨宇星1,3,4, 王法明1,2,3,4
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1.中国科学院海洋研究所 青岛 266071;2.中国科学院大学 北京 100049;3.中国科学院海洋环流与波动重点实验室 青岛 266071;4.青岛海洋科学与技术国家实验室海洋动力过程与气候功能实验室 青岛 266071
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| 摘要: |
| 为研究模式模拟南太平洋副热带偶极子的能力，本文利用CMIP5（Coupled Model Intercomparison Project Phase 5）模式的模拟数据评估了15种模式模拟南太平洋副热带偶极子（South Pacific Subtropical Dipole，SPSD）时空分布的效果，并予以评分。结果表明：其中10种模式可以模拟出完整的SPSD生成发展过程，且SPSD的主要区域与观测较为接近，但其余5种模式在模拟强度、位置与观测有较大出入；所有模式在模拟SPSD生成阶段时比观测提前一个月出现偶极模态，1/4的模式海表面温度（sea surface temperature，SST）偶极异常可以追溯到6个月之前；潜热通量与SST的时空分布显示，潜热通量是影响偶极模态生成发展的主要因素。模态的变化主要受大气环流的调制，在模态发展最强时部分模式的正极上方有正潜热通量异常，即海洋向大气传递热量。分析显示模式模拟海气耦合过程中的SST模拟强度较观测偏强，气压方面与观测较为接近。 |
| 关键词: CMIP5(Coupled Model Intercomparison Project Phase 5)模式 南太平洋副热带偶极子 热力耦合 大气环流 |
| DOI：10.11693/hyhz20180700185 |
| 分类号:P47 |
| 基金项目:国家自然科学基金项目，41776035号，41606018号，41676007号，41421005号；国家自然科学基金委员会-山东省人民政府联合资助海洋科学研究中心项目，U1406402号。 |
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| PERFORMANCE OF FIFTEEN CMIP5 MODELS ON THE SOUTH PACIFIC DIPOLE:COMPARISON AND COMMENT |
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WANG Zhuo-Yue1,2,3,4, ZHENG Jian1,3,4, YANG Yu-Xing1,3,4, WANG Fa-Ming1,2,3,4
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1.Institute of Oceanology, Chinese Academy of Science, Qingdao 266071, China;2.University of Chinese Academy of Science, Beijing 100049, China;3.Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Qingdao 266071, China;4.Laboratory for Ocean and Climate Dynamics, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
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| Abstract: |
| We applied 15 CMIP5 (Coupled Model Intercomparison Project Phase 5) models to stimulate temporal and spatial distribution of the South Pacific Subtropical Dipole (SPSD), from which the performance of the 15 models were compared and scored. The results show that 10 of them could present a complete SPSD in development course, and the main areas of SPSD are similar to the observations. However, the rest 5 models showed large differences in the intensity and the position of observation of the SPSD. Most of the CMIP5 models showed a one-month lead to the observation result in the initial phase of SPSD, and about one third of the models could display the dipole anomaly of sea surface temperature 3-6 months in the past retroactively. As shown in the temporal and spatial distribution, latent heat flux is the main factor affecting the development of SPSD under an atmospheric circulation anomaly. For the SPSD mature phase, some models could show a positive latent heat flux anomaly over the positive pole, indicating that the ocean would feedback to the atmospheric circulation in latent heat flux and form a negative feedback circulation. Therefore, these CMIP5 models perform better in sea-surface-temperature simulation than sea-surface-pressure simulation. |
| Key words: CMIP5 Project SPSD(south pacific subtropical dipole) thermodynamic coupling atmospheric circulation |