滨海县近50年气候变化特征分析

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

利用滨海县1959-2008年历年日平均气温、最高(低)气温、降水量、日照时数等资料,分析该县50a来不同时间尺度的气候变化特征。结果表明:年平均气温、年平均最高和最低气温在20世纪90年代以后逐渐上升,近10a上升较为明显;增温的程度为冬季>春季>秋季>夏季。年降水量总体呈下降趋势,减幅为16.6mm/10a;夏季和冬季呈增加趋势,春季和秋季呈减少趋势;近10a降水量夏季增加更加明显,冬季由增加转变为减少,春季和秋季由减少转变为增加的趋势。90年代以后日照时数明显减少。

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 winter>spring>autumn>summer.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.