大尺度大气运动年际变化的数值研究

A NUMERICAL STUDY ON THE LONG-TERM VARIABILITY OF LARGE-SCALE FLOW IN THE ATMOSPHERE

摘要: 大尺度大气运动的流型和区域性气象要素随时间的演变,均具有比较清楚的年际变化。流型和要素年际变化的若干统计规律,正在长期天气预报和气候预报的业务中被广泛运用。目前,关于年际变化形成机理的问题已日益受到重视,这将为相应的预报方法提供动力学的理论基础。

Abstract: A two-layer quasigeostrophic low-order model is integrated numerically for more than thirty model years. The evolution of the large-scale flow patterns can exhibit the periodicity with three year period, which is similar to some observational facts occurring in the atmosphere.