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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >LONG-TERM CLIMATE VARIABILITY IN A SIMPLE, NONLINEAR ATMOSPHERIC MODEL
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LONG-TERM CLIMATE VARIABILITY IN A SIMPLE, NONLINEAR ATMOSPHERIC MODEL

机译：简单的非线性大气模型中的长期气候变化

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A nonlinear, baroclinic, hemispheric, low-order model of the atmosphere with nonzonal orographic and zonal thermal forcings has been constructed. The model is used to investigate the long-term climate variability by running it over 1100 years, The model runs show a chaotic behavior in a realistic parameter range. With and without a seasonal cycle in the thermal forcing, the model generates decadal climate variations which are of the same order as interannual variations, The maximum variability is found in a broad range of periods between 3 and 44 years, Empirical orthogonal function analysis reveals that these fluctuations are predominantly caused by the interaction between the orographically excited standing wave and the mean zonal flow. The computed power spectra of the principal component time series stress the importance of the high-frequency transients in long-term climate variability. [References: 24]
机译：建立了具有非区域性地形和区域性热强迫的非线性，斜压，半球，低层大气模型。该模型用于通过运行1100年来研究长期气候变异性。该模型运行显示了在实际参数范围内的混沌行为。无论是否存在热强迫的季节性周期，该模型都会产生年代际气候变化，该变化与年际变化具有相同的阶次。在3年至44年的宽泛范围内发现最大变化，经验正交函数分析表明：这些波动主要是由地形激发驻波与平均纬向流之间的相互作用引起的。主成分时间序列的计算功率谱强调了高频瞬变在长期气候变化中的重要性。 [参考：24]

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