The tropical Pacific cold tongue mode and its associated main ocean dynamical process in CMIP5 models
The tropical Pacific cold tongue mode and its associated main ocean dynamical process in CMIP5 models
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CMIP5模式中热带太平洋冷舌模及其相关的主要海洋动力过程
DOI：
10.26464/epp2019041
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发表时间：
2019-09
影响因子：
2.9
通讯作者：
Wu Xiaofei
中科院分区：
文献类型：
--
作者：
Li Yang;Chen Quanliang;Li Jianping;Zhang Wenjun;Song Minhong;Hua Wei;Cai Hongke;Wu Xiaofei
冷舌模态（CTM）反映了赤道东太平洋冷舌区与热带太平洋其它地区海温距平（SSTA）变率的异相关系，表明赤道东太平洋存在长期变冷趋势。在这项研究中，我们调查如何以及CTM是再现在历史模拟中所产生的20个模型考虑在第5阶段的耦合模型相互比较项目（CMIP 5）。从定性上看，所有20个模型都大致捕获了与CTM相关的冷却SSTA。然而，定量评估（即，泰勒图和模拟与观察之间的趋势比率）显示，这20个模型中只有5个（即，CESM 1-CAM 5、CMCC-CM、FGOALS-g2、IPSL-CM 5 B-LR和NorESM 1-M）能够以有用的精度再现CTM的空间格局和长期趋势。我们发现，这五个模式一般模拟的主要海洋动力过程与CTM。也就是说，这些模式充分捕捉到了长期冷却趋势的垂直平流异常温度的平均上升流。我们的结论是，这些CMIP 5模型的性能，相对于模拟的长期冷却趋势与垂直平流，相关的长期下降趋势的海洋温度异常的垂直梯度，可以发挥重要作用，在成功再现的CTM。
The cold tongue mode (CTM), which represents the out-of-phase relationship in sea surface temperature anomaly (SSTA) variability between the Pacific cold tongue region and elsewhere in the tropical Pacific, shows a long-term cooling trend in the eastern equatorial Pacific. In this study, we investigate how well the CTM is reproduced in historical simulations generated by the 20 models considered in Phase 5 of the Coupled Model Intercomparison Project (CMIP5). Qualitatively, all 20 models roughly capture the cooling SSTA associated with the CTM. However, a quantitative assessment (i.e., Taylor diagrams and the ratio of the trend between the simulations and observations) shows that only five of these 20 models (i.e., CESM1-CAM5, CMCC-CM, FGOALS-g2, IPSL-CM5B-LR, and NorESM1-M) can reproduce with useful accuracy the spatial pattern and long-term trend of the CTM. We find that these five models generally simulate the main ocean dynamical process associated with the CTM. That is, these models adequately capture the long-term cooling trend in the vertical advection of the anomalous temperature by the mean upwelling. We conclude that the performance of these CMIP5 models, with respect to simulations of the long-term cooling trend associated with the vertical advection, and the related long-term decreasing trend of the vertical gradient of the oceanic temperature anomaly, can play an important role in successful reproduction of the CTM.
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影响因子：
5.2
作者：
Wenjun Zhang;F. Jin;A. Turner
通讯作者：
Wenjun Zhang;F. Jin;A. Turner
影响因子：
--
作者：
Zhang, Wenjun;Li, Jianping;Zhao, Xia
通讯作者：
Zhao, Xia
观测中的 ENSO 频率不对称性和太平洋年代际振荡以及 19 个 CMIP5 模型
影响因子：
5.8
作者：
Lin Renping;Zheng Fei;Dong Xiao
通讯作者：
Dong Xiao
影响因子：
6.7
作者：
J. Kug;Y. Ham;June‐Yi Lee;F. Jin
通讯作者：
J. Kug;Y. Ham;June‐Yi Lee;F. Jin
影响因子：
8
作者：
Capotondi, Antonietta;Wittenberg, Andrew T.;Yeh, Sang-Wook
通讯作者：
Yeh, Sang-Wook