The Intraseasonal Interaction Characteristics of the Tropical and Extratropical Circulations. Part I: Diagnostic Analysis Study
热带内外地区环流季内变化的相互作用特征 I. 诊断分析研究

Based on ECMWF objective analysis data, situated mainly in East Asia during winter years of 1983 / 1984 and 1986 / 1987, the intraseasonal interaction characterstics among the monsoon circulations of tropical and extratropical zones, the tropical convective activiities and the low frequency wave energy have been investigated in this paper. The main results emphasize that the East Asian winter monsoon is of importance in triggering the above--mentioned interaction process. Meanwhile, on intraseasonal time scale, the tropical convective effect can be of an important junction factor for the course of the 7tropical--extratropical interaction.