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通过在中国科学院大气物理研究所热带太平洋环流模式与一个统计大气模式所建立的混合型海气耦合模式中引入次表层上卷海温非局地参数化方案,对比分析了次表层上卷海温对耦合模式模拟结果的影响,表明在引入次表层上卷海温非局地参数化方案前耦合模式模拟的SSTA最大变率中心位于日界线附近赤道南北狭窄范围内,而在赤道东太平洋及南美沿岸一带变率过低,周期呈准2年振荡。改进后,耦合模式模拟结果的分布不论在东西方向亦或南北方向与观测更为相近,振荡周期为4年左右,而且还能模拟出观测中ENSO振荡的季节依赖性特征。进一步分析改进的耦合模式中海气耦合特征,表明“延迟振子”理论、“西太平洋振子”理论、“充电-放电振子”理论及“平流-反射”理论所揭示的一些规律在该模式中都能被不同程度地描述出来,这说明在实际的ENSO循环过程中,可能有多种机制在同时起作用。
By introducing the non-local parameterization scheme of subsurface upper sea surface temperature in the hybrid model of sea-atmosphere coupling established by the tropical Pacific Ocean circulation model and a statistical atmospheric model of the Institute of Atmospheric Physics, Chinese Academy of Sciences, the sea surface temperature The results show that the maximum SSTA variability center simulated by the non-local parametric scheme of the sea surface temperature on the sub-surface is located within the narrow north-south equator near the daily boundary, while in the eastern equatorial Pacific and South America The rate of change along the coast is too low, with a period of 2 years oscillating. After the improvement, the distribution of the coupling model simulation results is more similar to the observation in the east-west direction or the north-south direction with an oscillation period of about 4 years, and can also simulate the season-dependent characteristics of ENSO oscillations in the observation. Further analysis of the coupled characteristics of the ocean-atmosphere coupling in the improved coupling model shows that the theory of “Delay Oscillator ”, “Western Pacific Oscillator ”, “Charged- Discharge Oscillator ” and "Advection- Some laws can be described in different degrees in this model, which shows that there are probably many mechanisms that can work simultaneously in the actual ENSO cycle.