一个较高分辨率的基于通量订正的海-气耦合环流模式的设计和性能评估

采用日通量距平耦合方案,将中科院大气所最新发展的两个具有较高分辨率的大气和海洋环流模式耦合,并进行了10年以上的耦合积分。为了评估模式的基本性能,对比分析了耦合与未耦合的大气环流模式和海洋环流模式模拟结果,结果显示耦合模式比较成功地控制了"气候漂移",可以较好地模拟平均气候态和季节变化。     

ZONALLY SYMMETRICAL EKMAN-CISK MECHANISM AND 30—60-DAY LOW FREQUENCY OSCILLATION NEAR THE EQUATOR

Based on the baroclinic semi-geostrophic model,the effects of zonally symmetrical Ekman-CISK mechanism on the characteristics of 30—60-day low frequency oscillation(LFO)near theequator are investigated.It is found that the theoretical results are in good agreement with theobservational features of LFO.Besides,the planetary-scale LFO with the period of 30—60 d couldbe triggered by the Ekman-CISK mechanism,and the growth rate of perturbation with wavenumber 1 is in order of O (10~(-6)s~(-1)).The zonal propagation of LFO and the correspondinglongitudinal-height structure of physical quantities are also discussed in detail.