Abstract: Based on the air temperature data of meteorological stations from 1961 to 2007,the characteristics of temperature change in Mengjin for recent 47 years were studied,by using linear-trend estimate,Mann-Kendall catastrophe test,wavelet analysis and accumulative anomaly.The results indicated that the year average temperature had an obviously increasing tendency during 47 years,and increased by 0.19℃ per 10 years,the main period oscillation of the annual average temperature was 21-27 years.The change features of seasonal temperature were most notable,warmer sharply in winter,cooler continually in summer,and warmer significantly in spring and fall.According to the main periods of seasonal temperature changes,it will be mainly in the warmer period for 3-6 years in the future.The active accumulative temperature of ≥0℃ and ≥10℃ had significant upward trends after 1993.

Key words: Temperature, Temperature, Wavelet analysis, Mann-Kendall test, Accumulative anomalies