1953～2008年辽宁本溪地区气候异常年分析

对1953～2008年本溪地区温度和降水资料进行统计分析。利用Mann-Kendall方法对年平均气温和年降水量进行突变年检测;应用气温降水异常指标,分析确定异常年。结果表明,本溪地区气候变化特点是温度上升,降水呈减少趋势。气温增加幅度各季差异较大,对气候变暖贡献最大的是冬季,平均最低气温升高幅度明显高于平均最高气温;年平均气温1988年为突变年。1953～2008年,本溪地区降水量呈减少趋势,阶段性较明显;1974年为突变年,之前为降水偏多时段,之后为降水偏少时段。

Analysis of Climate Anomalies Years in Benxi Region of Liaoning from 1953 to 2008

Based on the statistical analysis of temperature and precipitation data in Benxi from 1953 to 2008. Mann-Kendall method was used to make the mutation years detection of average temperature and annual precipitation. The temperature and precipitation anomaly indices were used to analyze and confirm the abnormal years. The results showed that the climate changes in Benxi region showed the trend of increased temperature and decreased precipitation. Warming increase extent of the air temperature differed greatly in various seasons. The biggest contribution to climate warming was in winter and the increasing extent of average minimum temperature was higher than that of average maximum temperature. The year of 1988 for the annual average temperature was variation year. The precipition in Benxi Region during 19532008 showed a decreasing trend with obvious stages. The year of 1974 was variation year,the period before 1974 had more precipitation and the period after 1974 had less precipitation.