摘要
利用自适应多分辨滤波器，对近百年来四川气温变化的突变性和持续性进行了多尺度的诊断分析。结果表明，四川盆地在３０年代前为偏冷期，３０年代至６０年代初为偏暖期，６０年代后期至今为偏冷期；４０年代末发生了明显的暖转冷的趋势突变；
Using the adaptive multiresolution data filter,the multihierarchical structure and jump features of climate changes in Sichuan province during last 100 years are studied.The results show that (1)the air temperature variations in Sichuan basin can be described as three hierarchies:cold period before 1932,warm period from 1933～1965 and cold period after 1966.(2)The year 1949 is the jump point of cooling,and the temperature warming after 1987 is unstable.
