大尺度环流与中尺度对流的作用研究

气候系统是一个复杂的、开放的非线性系统，具有层次结构. 高层次系统控制着低层次系统的行为，并决定了气候变化的基本形态. 一般地，观测资料或器测资料往往直接记录的是低层次系统的输出结果，它包含了各层次相互作用的信息. 如何从观测资料中提取与分离高层次系统的尺度信息已成为观测资料的非线性时空分布理论和方法的研究热点之一. 目前对气候系统的具体的形式还没有统一的定论. 为了分析问题的方便，引用了一个由Logistic模型与Lorenz模型构建的两层系统模型，在不同的控制参数下，分别应用功率谱分析和小波变换对低层次系统的输出结果进行了分析，进而提取与分离高层次系统的尺度变化信息.

Analysis of the functional relationship between the large-scale circulations and meso-scale convective systems

The climate system is a chaotic, hierarchical open nonlinear system. The system of higher level dominates the behavior of the lower one and determines the basic configuration of climate change. Generally, what the observational data record is the output of lower layer system which necessarily contains the information of interaction between different levels. How to extract information of higher level system from observational data has been a hotspot in the research of nonlinear spatio-temporal distribution theory and methods of observational data processing. A unified form ulation of the climate system has not yet been established. For the convenience of study, in this paper we use a two-level model comprising the logistic model and lorenz model, and analyze the output of lower level system through power spectrum and wavelet analysis under different control parameter and obtain the scaling rules for extracting information of the higher level system.