| Heat Budget of the South-Central Equatorial Pacific in CMIP3 Models |
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| 作者姓名： | LIU Xiangcui and LIU Hailong |
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| 基金项目： | supported by the Global Change Research Great Scientific Research Plan Program: “Development and Evaluation of High Resolution Climate Models” (Grant No.2010CB951904);the National Natural Science Foundation of China (Grant Nos.41075059 and 41023002) |
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| 摘 要： | ABSTRACT Using data from 17 coupled models and nine sets of corresponding Atmospheric Model Intercomparison Project （AMIP） results, we investigated annual and seasonal variation biases in the upper 50 m of the south-central equatorial Pacific, with a focus on the double-ITCZ bias, and examined the causes for the amplitude biases by using heat budget analysis. The results showed that, in the research region, most of the models simulate SSTs that are higher than or similar to observed. The simulated seasonal phase is close to that observed, but the amplitudes of more than half of the model results are larger than or equal to observations. Heat budget analysis demonstrated that strong shortwave radiation in individual atmospheric models is the main factor that leads to high SST values and that weak southward cold advection is an important mechanism for maintaining a high SST. For seasonal circulation, large surface shortwave radiation amplitudes cause large SST amplitudes.
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| 关 键 词： | 赤道太平洋 模型模拟 中南部 预算 短波辐射 热带辐合带 大气模式 耦合模式 |
Heat budget of the south-central equatorial Pacific in CMIP3 models |
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| LIU Xiangcui,and,LIU Hailong.Heat Budget of the South-Central Equatorial Pacific in CMIP3 Models[J].Advances in Atmospheric Sciences,2014,31(3):669-680. |
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| Authors: | Xiangcui Liu Hailong Liu |
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| Institution: | 1. State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
2. Graduate University of the Chinese Academy of Sciences, Beijing, 100049, China
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| Abstract: | Using data from 17 coupled models and nine sets of corresponding Atmospheric Model Intercomparison Project (AMIP) results, we investigated annual and seasonal variation biases in the upper 50 m of the south-central equatorial Pacific, with a focus on the double-ITCZ bias, and examined the causes for the amplitude biases by using heat budget analysis. The results showed that, in the research region, most of the models simulate SSTs that are higher than or similar to observed. The simulated seasonal phase is close to that observed, but the amplitudes of more than half of the model results are larger than or equal to observations. Heat budget analysis demonstrated that strong shortwave radiation in individual atmospheric models is the main factor that leads to high SST values and that weak southward cold advection is an important mechanism for maintaining a high SST. For seasonal circulation, large surface shortwave radiation amplitudes cause large SST amplitudes. |
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| Keywords: | double ITCZ south-central equatorial Pacific heat budget annual mean seasonal variation |
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