Analysis of Climate Change Character for Last 50 Years in Binhai Count

Based on the analysis of mean daily,maximum and minimum temperature,precipitation and sunshine in Binhai county,the characteristics of interannual variation and seasonal variation was studied.The annual mean,maximum and minimum temperature was increased gradually,especially for the last 10 years,and the rank of the increased rate was winterspringautumnsummer.The annual precipitation decreaed gradully at a rate of about 16.6mm per 10 years.However the precipitation in summer and winter showed an increasing trend,and that of spring and autumn showed a decreasing trend.For the last 10 years,the increase rate of summer precipitation was obvious,and winter precipitation changed from increasing to decreasing,the spring and autumn precipitation changed from decreasing to increasing.The sunshine decreased obviously since 1990s.