The Influence of Coupled Sea Surface Temperatures on the Madden–Julian Oscillation: A Model Perturbation Experiment
The Influence of Coupled Sea Surface Temperatures on the Madden–Julian Oscillation: A Model Perturbation Experiment
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DOI：
10.1175/1520-0469(1999)056
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发表时间：
1999-02
影响因子：
3.1
通讯作者：
D. Waliser;K. Lau;Jae-Hoon Kim
中科院分区：
文献类型：
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作者：
D. Waliser;K. Lau;Jae-Hoon Kim
摘要 在这项研究中，作者针对两种不同的海表温度（SST）边界条件，比较了戈达德大气实验室大气环流模式中的 Madden - Julian振荡（MJO）变率。在“控制”模拟中，该模式采用指定的年循环海表温度。在“耦合”模拟中，该模式采用相同的年循环海表温度，但还与一个平板海洋混合层相耦合，该混合层在赤道南北24°范围内提供海表温度异常的预报。结果表明，就Slingo等人在大气模式比较计划研究中近期所记录的与MJO相关的一些模式普遍缺陷而言，简化的海表温度相互作用有助于更好地模拟。这些改进包括：1）与MJO相关的变率增加；2）模拟的季节内变率的时间尺度更接近并集中在观测中发现的时间尺度的趋势；3）……（此处原文“reduce”不完整，可能影响准确翻译）
Abstract In this study, the authors compare the Madden–Julian oscillation (MJO) variability in the Goddard Laboratory for Atmospheres atmospheric general circulation model for two different sea surface temperature (SST) boundary conditions. In the “control” simulation, the model employs specified annual cycle SSTs. In the “coupled” simulation, the model employs the same annual cycle SSTs but in addition is coupled to a slab ocean mixed layer that provides prognostic SST anomalies equatorward of 24°. The results show that the simplified interactive SST facilitates a better simulation with respect to a number of general model shortcomings associated with the MJO that were recently documented by Slingo et al. in an Atmospheric Model Intercomparison Project study. These improvements include 1) increased variability associated with the MJO, 2) a tendency for the timescales of the modeled intraseasonal variability to more closely match and consolidate around the timescales found in the observations, 3) a reduce...