Analysis on the Characteristics of Climate Change in Zigong in Recent 50 Years

Based on Zigong meteorological data from 1955 to 2006, tendency method, accumulated anomaly method and Mann-Kendall method are adopted to analyze the characteristic of climatic change.The research shows:In the background of global warming, Zigong climate has changed.In recent 52 years, the annual average temperature has a weak increasing trend.The annual precipitation has a weak decreasing trend.Autumn has a notable warming-dry trend.Spring has a notable wetting trend.In recent 10 years, Zigong has a clearly climate warming trend.