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首页> 外文期刊>Journal of Physical Oceanography >Representation of the Equatorial Undercurrent in CMIP5 Models
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Representation of the Equatorial Undercurrent in CMIP5 Models

机译:CMIP5模型中赤道欠电流的表示

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摘要

The Equatorial Undercurrent (EUC) is a vital component of tropical Pacific circulation, helping to modulate the state of the equatorial Pacific Ocean. Here we compare the representation of the EUC in models from phase 5 of the Coupled Model Intercomparison Project (CMIP5) with observations of the undercurrent. We find that the CMIP5 models consistently underestimate both the magnitude and variability of the EUC. Insufficient resolution as well as diffusivity parameterizations both contribute to a representation of the EUC that is too weak and too diffuse. Given the strong influence of theEUCon the evolution of tropical Pacific sea surface temperatures, model deficiencies in theEUCcontribute to shortcomings in capturing ENSO dynamics and Pacific decadal variability. Further evaluation of the impact of EUC simulation on the climatology and variability in the tropical Pacific is necessary.
机译:赤道暗流(EUC)是热带太平洋循环的重要组成部分,有助于调制赤道太平洋的状态。在这里,我们将EUC的表示与耦合型号相互比较项目(CMIP5)的阶段5的模型的表示与暗流的观察结果进行比较。我们发现CMIP5模型一致地低估了EUC的幅度和可变性。分辨率不足以及扩散性参数化都有助于表示太弱和太散散的EUC的表示。鉴于Theeucon对热带太平洋海面温度的演变,捕获Enso动力学和太平洋近代变异性的缺点,遗传缺陷的强劲影响。进一步评估EUC模拟对热带太平洋气候学和变异性的影响是必要的。

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