Nearly 100 years, the global mean temperature experienced two waves as cold-warm-cold-warm, in a rising trend on the whole. In the late 1980's, global temperature rose significantly. The average global temperature during the period of 1981-1990 was 0.48℃ higher than that 100 years before. In recent years, the climate has a trend of getting worse. In this paper, a time series analysis was used to set up a non-stationary time series model for studying the dynamic change of average temperature in Hefei city du...
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