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基于“线性统计修正”同步耦合方案,把中国科学院大气物理研究所两层大气环流模式同具有较高分辨率的热带太平洋环流模式耦合起来.长期数值积分表明,模式不但能够模拟出真实合理的平均气候状态及其季节变化,还能模拟出与观测接近的年际气候变率.这种年际变率在热带太平洋表现为海温在次表层达到其最大值并且在赤道上沿斜温层自西向东传播而在赤道两侧则自东向西传播,从而构成了主周期为4a左右的循环过程.
Based on the “linear statistical correction” synchronous coupling scheme, the two-atmosphere general circulation model of the Institute of Atmospheric Physics of the Chinese Academy of Sciences is coupled with the higher-resolution tropical Pacific circulation model. The long-term numerical integration shows that the model can not only simulate a real and reasonable average Climate status and its seasonal variation, but also simulate the interannual climate variability close to the observation.The interannual variability in the tropical Pacific shows that the SST reaches its maximum in the subsurface and reaches the maximum along the equator Spreading west to east and spreading from east to west on both sides of the equator, thus forming a cycle with a main period of about 4a.