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The Southwest Indian Ocean Thermocline Dome in CMIP5 Models:Historical Simulation and Future Projection

查看全文 作　　者：Xiao-Tong [1,2]ZHENG;Lihui [1]GAO;Gen [3]LI;Yan [3]DU 高影响力作者 机构地区：[1]Key Laboratory of Physical Oceanography, Ministry of Education, and Key Laboratory of Ocean–Atmosphere Interaction and Climate in Universities of Shandong, Ocean University of China;[2]Qingdao Collaborative Innovation Center of Marine Science and Technology, Ocean University of China;[3]State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology,Chinese Academy of Sciences高影响力机构 出　　处：《Advances in Atmospheric Sciences》索引2016年第33卷第4期,共15页高影响力期刊 基　　金：supported by the National Basic Research Program of China (Grant Nos.2012CB955600 and 2015CB954300);the National Natural Science Foundation of China (Grant Nos. 41106010 and 41476003);the State Key Laboratory of Tropical Oceanography, Chinese Academy of Sciences (Grant Nos. LTO1206 and LTOZZ1202);a China Meteorological Public Welfare Science Research Project (Grant No. GYHY201306027) 摘　　要：Using 20 models of the Coupled Model Intercomparison Project Phase 5(CMIP5), the simulation of the Southwest Indian Ocean(SWIO) thermocline dome is evaluated and its role in shaping the Indian Ocean Basin(IOB) mode following El Ni ?no investigated. In most of the CMIP5 models, due to an easterly wind bias along the equator, the simulated SWIO thermocline is too deep, which could further influence the amplitude of the interannual IOB mode. A model with a shallow(deep)thermocline dome tends to simulate a strong(weak) IOB mode, including key attributes such as the SWIO SST warming,antisymmetric pattern during boreal spring, and second North Indian Ocean warming during boreal summer. Under global warming, the thermocline dome deepens with the easterly wind trend along the equator in most of the models. However, the IOB amplitude does not follow such a change of the SWIO thermocline among the models; rather, it follows future changes in both ENSO forcing and local convection feedback, suggesting a decreasing effect of the deepening SWIO thermocline dome on the change in the IOB mode in the future. 关 键 词：历史模拟 南印度洋 模拟模型 温跃层 圆顶 投影 全球变暖 反对称模式
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