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首页> 外文期刊>SOLA: Scientific Online Letters on the Atmosphere >Improvement of Thermocline Structure that Affect ENSO Performance in a Coupled GCM
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Improvement of Thermocline Structure that Affect ENSO Performance in a Coupled GCM

机译：影响耦合GCM的ENC性能的温跃层结构的改进

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References(18) Cited-By(7) Supplementary materials(1) Many coupled atmosphere-ocean general circulation models (AOGCMs) have difficulty reproducing the El Niño/Southern Oscillation (ENSO) phenomenon. The AOGCM MIROC underestimates ENSO variability. This paper investigates the dependence of the simulated ENSO amplitude on the treatment of ocean subsurface processes.Excessive vertical diffusivity in the subsurface ocean interferes the reproduction of a tightly stratified thermocline because the MIROC model includes numerical instability in the vertical diffusion computation and uses a large background diffusivity. The introduction of a stable numerical scheme and small background diffusivity helped improve the stratification. The improved thermocline enhanced the ENSO amplitude because the vertical heat exchange between above and below the thermocline was enhanced during the El Niño phase.
机译：参考文献（18）被引用的参考文献（7）补充材料（1）许多耦合的大气-海洋总体循环模型（AOGCM）难以再现厄尔尼诺/南方涛动（ENSO）现象。 AOGCM MIROC低估了ENSO的可变性。本文研究了模拟ENSO振幅对海洋地下过程处理的依赖性。由于MIROC模型在垂直扩散计算中包含数值不稳定性并使用了较大的背景，因此地下海洋中垂直扩散率过高会干扰紧密分层的温跃层的繁殖。扩散性。引入稳定的数值方案和小的背景扩散有助于改善分层。改进的温跃层提高了ENSO振幅，因为在厄尔尼诺现象期间，温跃层上下之间的垂直热交换得到了增强。

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