行星尺度定常波经向波列波射线路径及截获带的季节特征

SEASONAL CHARACTERS OF RAY PATH OF MERIDIONAL WAVE TRAIN OF PLANETARY SCALE STATIONARY WAVE AND ITS TRAPPING ZONE

本文采用平均西风廓线的实际资料,对冬夏季节遥相关经向波列特征进行了研究,本文数值分析表明,由于冬夏平均西风廓线的季节差异,遥相关波列也呈显著的季节特征:波射线的传播、截获范围、波折射率随纬度变化状态、大地形与海洋热源因子引起经向波列共振特征均表现出明显的季节差异。本文还探讨了大地形、热源因子与遥相关经向波列特征的相关关系。

The characteristics of meridional wave train in teleconnection in winter and summer are investigated by using mean westerly profile data.The numerical analysis shows the distinct seasonalcharacteristics of teleconnection wave train due to seasonal differences between the mean westerlyprofile in winter and that in summer,ie.there are distinct seasonal differences in the propagationof rays,trapping zone,variation of wave refractive index with latitude,resonant features ofmeridional wave train forced by large scale topography and maritime heat source.In this paper,the correlations between large scale topography,heating source and characteristics of meridionalave train in teleconnection are also discussed.